TSK-1596: Automatic TraceLogging (#1577)

.github/workflows/continuous-integration.yml

@@ -230,6 +230,7 @@ jobs:
           - taskana-common
           - taskana-common-security
           - taskana-common-data
+          - taskana-common-logging
           - taskana-common-test
           - taskana-core
           - taskana-cdi
@@ -367,7 +368,8 @@ jobs:
           ./mvnw -B deploy -P $([[ "$GITHUB_REF" =~ ^refs/tags/v[0-9]+\.[0-9]+\.[0-9]+$ ]] && echo "release" || echo "snapshot") \
           --settings ci/mvnsettings.xml -DskipTests -Dcheckstyle.skip -Dasciidoctor.skip -Djacoco.skip \
           -pl :taskana-parent,\
-          :taskana-common-parent,:taskana-common,:taskana-common-security,:taskana-common-data,:taskana-common-test,\
+          :taskana-common-parent,:taskana-common-logging,:taskana-common,:taskana-common-security,\
+          :taskana-common-data,:taskana-common-test,\
           :taskana-lib-parent,:taskana-core,:taskana-cdi,:taskana-spring,\
           :taskana-rest-parent,:taskana-web,:taskana-rest-spring,\
           :taskana-history-parent,:taskana-simplehistory-provider,:taskana-simplehistory-rest-spring,:taskana-loghistory-provider,\

ci/taskana-sonar-test-coverage/pom.xml

@@ -17,6 +17,11 @@
 
   <dependencies>
     <!-- all common dependencies -->
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-common</artifactId>

common/pom.xml

@@ -21,5 +21,6 @@
     <module>taskana-common-security</module>
     <module>taskana-common-data</module>
     <module>taskana-common-test</module>
+    <module>taskana-common-logging</module>
   </modules>
 </project>

common/taskana-common-data/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.mybatis</groupId>
       <artifactId>mybatis</artifactId>
@@ -52,4 +57,4 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
-</project>
+</project>

common/taskana-common-data/src/main/java/pro/taskana/sampledata/SampleDataGenerator.java

@@ -51,43 +51,29 @@ public class SampleDataGenerator {
   }
 
   public void generateSampleData() {
-    LOGGER.debug("entry to generateSampleData()");
     clearDb();
     Stream<String> scripts = SampleDataProvider.getSampleDataCreationScripts();
     executeAndCacheScripts(scripts, CACHED_SAMPLE);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("exit from generateSampleData()");
-    }
   }
 
   public void generateTestData() {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to generateTestData()");
-    }
     Stream<String> scripts = SampleDataProvider.getTestDataScripts();
     executeAndCacheScripts(scripts, CACHED_TEST);
-    LOGGER.debug("exit from generateTestData()");
   }
 
   public void generateMonitorData() {
-    LOGGER.debug("entry to generateMonitorData()");
     Stream<String> scripts = SampleDataProvider.getMonitorDataScripts();
     executeAndCacheScripts(scripts, CACHED_MONITOR);
-    LOGGER.debug("exit from generateMonitorData()");
   }
 
   public void clearDb() {
-    LOGGER.debug("entry to clearDb()");
     Stream<String> scripts = SampleDataProvider.getScriptsToClearDatabase();
     executeAndCacheScripts(scripts, CACHED_CLEAR_DB);
-    LOGGER.debug("exit from clearDb()");
   }
 
   public void dropDb() {
-    LOGGER.debug("entry to dropDb()");
     Stream<String> scripts = SampleDataProvider.getScriptsToDropDatabase();
     executeAndCacheScripts(scripts, CACHED_DROP_DB);
-    LOGGER.debug("exit from dropDb()");
   }
 
   private List<String> parseScripts(Stream<String> scripts) {
@@ -127,7 +113,6 @@ public class SampleDataGenerator {
   }
 
   private void executeAndCacheScripts(Stream<String> scripts, String cacheKey) {
-    LOGGER.debug("entry to executeAndCacheScripts(scripts = {}, cacheKey = {})", scripts, cacheKey);
     runScripts(
         runner ->
             CACHED_SCRIPTS.computeIfAbsent(cacheKey, key -> parseScripts(scripts)).stream()
@@ -135,7 +120,6 @@ public class SampleDataGenerator {
                 .map(ByteArrayInputStream::new)
                 .map(s -> new InputStreamReader(s, StandardCharsets.UTF_8))
                 .forEach(runner::runScript));
-    LOGGER.debug("exit from executeAndCacheScripts()");
   }
 
   private ScriptRunner getScriptRunner(

common/taskana-common-logging/pom.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>taskana-common-logging</artifactId>
+
+  <name>${project.groupId}:${project.artifactId}</name>
+  <description>The global trace logging implementation</description>
+
+  <parent>
+    <artifactId>taskana-common-parent</artifactId>
+    <groupId>pro.taskana</groupId>
+    <version>4.6.1-SNAPSHOT</version>
+  </parent>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.aspectj</groupId>
+      <artifactId>aspectjrt</artifactId>
+      <version>${version.aspectj}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
+
+    <!-- test dependencies -->
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>uk.org.lidalia</groupId>
+      <artifactId>slf4j-test</artifactId>
+      <version>${version.slf4j-test}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>com.nickwongdev</groupId>
+        <artifactId>aspectj-maven-plugin</artifactId>
+        <version>${version.aspectj-maven-plugin}</version>
+        <configuration>
+          <aspectLibraries combine.self="override"/>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

common/taskana-common-logging/src/main/java/pro/taskana/common/internal/logging/LoggingAspect.java

@@ -0,0 +1,85 @@
+package pro.taskana.common.internal.logging;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import org.aspectj.lang.JoinPoint;
+import org.aspectj.lang.annotation.AfterReturning;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Before;
+import org.aspectj.lang.annotation.Pointcut;
+import org.aspectj.lang.reflect.MethodSignature;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Aspect
+public class LoggingAspect {
+
+  private static final Map<String, Logger> CLASS_TO_LOGGER = new ConcurrentHashMap<>();
+
+  @Pointcut(
+      "!@annotation(pro.taskana.common.internal.logging.NoLogging)"
+          + " && execution(* *(..))"
+          + " && !execution(* lambda*(..))"
+          + " && !execution(String *.toString())"
+          + " && !execution(int *.hashCode())"
+          + " && !execution(boolean *.canEqual(Object))"
+          + " && !execution(boolean *.equals(Object))")
+  public void traceLogging() {}
+
+  @Before("traceLogging()")
+  public void beforeMethodExecuted(JoinPoint joinPoint) {
+    MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
+    String declaringTypeName = methodSignature.getDeclaringTypeName();
+    Logger currentLogger =
+        CLASS_TO_LOGGER.computeIfAbsent(declaringTypeName, LoggerFactory::getLogger);
+
+    if (currentLogger.isTraceEnabled()) {
+      String methodName = methodSignature.getName();
+      Object[] values = joinPoint.getArgs();
+      String[] parameterNames = methodSignature.getParameterNames();
+      String parametersValues = mapParametersNameValue(parameterNames, values);
+
+      currentLogger.trace("entry to {}({})", methodName, parametersValues);
+    }
+  }
+
+  @AfterReturning(pointcut = "traceLogging()", returning = "returnedObject")
+  public void afterMethodExecuted(JoinPoint joinPoint, Object returnedObject) {
+    MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
+    String declaringTypeName = methodSignature.getDeclaringTypeName();
+    Logger currentLogger =
+        CLASS_TO_LOGGER.computeIfAbsent(declaringTypeName, LoggerFactory::getLogger);
+
+    if (currentLogger.isTraceEnabled()) {
+      String methodName = methodSignature.getName();
+      // unfortunately necessary, because this method returns a raw type
+      Class<?> returnType = methodSignature.getReturnType();
+      if (returnType.isAssignableFrom(void.class)) {
+        currentLogger.trace("exit from {}.", methodName);
+      } else {
+        currentLogger.trace(
+            "exit from {}. Returning: '{}'", methodName, Objects.toString(returnedObject, "null"));
+      }
+    }
+  }
+
+  @NoLogging
+  private static String mapParametersNameValue(String[] parameterNames, Object[] values) {
+    Map<String, Object> parametersNameToValue = new HashMap<>();
+
+    if (parameterNames.length > 0) {
+      for (int i = 0; i < parameterNames.length; i++) {
+        parametersNameToValue.put(parameterNames[i], values[i]);
+      }
+    }
+
+    StringBuilder stringBuilder = new StringBuilder();
+    for (Entry<String, Object> parameter : parametersNameToValue.entrySet()) {
+      stringBuilder.append(parameter.getKey()).append(" = ").append(parameter.getValue());
+    }
+    return stringBuilder.toString();
+  }
+}

common/taskana-common-logging/src/main/java/pro/taskana/common/internal/logging/NoLogging.java

@@ -0,0 +1,10 @@
+package pro.taskana.common.internal.logging;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.TYPE})
+public @interface NoLogging {}

common/taskana-common-logging/src/test/java/pro/taskana/common/internal/logging/LoggingAspectTest.java

@@ -0,0 +1,177 @@
+package pro.taskana.common.internal.logging;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.assertj.core.api.Condition;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import uk.org.lidalia.slf4jext.Level;
+import uk.org.lidalia.slf4jtest.LoggingEvent;
+import uk.org.lidalia.slf4jtest.TestLogger;
+import uk.org.lidalia.slf4jtest.TestLoggerFactory;
+
+class LoggingAspectTest {
+
+  TestLogger logger = TestLoggerFactory.getTestLogger(LoggingTestClass.class);
+
+  @BeforeEach
+  public void clearLoggers() {
+    TestLoggerFactory.clear();
+  }
+
+  @Test
+  void should_Log_For_InternalMethod() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.logInternalMethod();
+
+    verifyLoggingStatement("logInternalMethod", "", null);
+  }
+
+  @Test
+  void should_Log_For_InternalMethodWithReturnValue() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.logInternalMethodWithReturnValue();
+
+    verifyLoggingStatement("logInternalMethodWithReturnValue", "", "test string");
+  }
+
+  @Test
+  void should_Log_For_InternalMethodWithReturnValueNull() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.logInternalMethodWithReturnValueNull();
+
+    verifyLoggingStatement("logInternalMethodWithReturnValueNull", "", "null");
+  }
+
+  @Test
+  void should_Log_For_InternalMethodWithArguments() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.logInternalMethodWithArguments("message");
+
+    verifyLoggingStatement("logInternalMethodWithArguments", "param = message", null);
+  }
+
+  @Test
+  void should_Log_For_InternalMethodWithReturnValueAndArguments() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.logInternalMethodWithReturnValueAndArguments("message");
+
+    verifyLoggingStatement(
+        "logInternalMethodWithReturnValueAndArguments", "param = message", "return value");
+  }
+
+  @Test
+  void should_NotLog_For_ExternalMethod() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.callsExternalMethod();
+
+    verifyLoggingStatement("callsExternalMethod", "", null);
+  }
+
+  @Test
+  void should_LogMultipleMethods_When_SubMethodIsCalled() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.logInternalMethodWrapper();
+    assertThat(logger.getLoggingEvents())
+        .extracting(LoggingEvent::getMessage)
+        .areExactly(2, new Condition<>(message -> message.startsWith("entry to"), "entry log"))
+        .areExactly(2, new Condition<>(message -> message.startsWith("exit from"), "exit log"));
+  }
+
+  @Test
+  void should_NotLogInternalMethod_When_MethodIsAnnotatedWithNoLogging() {
+    LoggingTestClass loggingTestClass = new LoggingTestClass();
+
+    loggingTestClass.doNotLogInternalMethod();
+
+    assertThat(logger.getLoggingEvents()).isEmpty();
+  }
+
+  @Test
+  void should_NotLogInternalMethod_When_ClassIsAnnotatedWithNoLogging() {
+    NoLoggingTestClass noLoggingTestClass = new NoLoggingTestClass();
+
+    noLoggingTestClass.doNotLogInternalMethod();
+
+    assertThat(logger.getLoggingEvents()).isEmpty();
+  }
+
+  @Test
+  void should_NotLogInternalMethod_When_SuperClassIsAnnotatedWithNoLogging() {
+    NoLoggingTestSubClass noLoggingTestSubClass = new NoLoggingTestSubClass();
+
+    noLoggingTestSubClass.doNotLogInternalMethod();
+
+    assertThat(logger.getLoggingEvents()).isEmpty();
+  }
+
+  private void verifyLoggingStatement(String methodName, String arguments, Object returnValue) {
+    assertThat(logger.getLoggingEvents()).hasSize(2);
+    LoggingEvent entryLoggingEvent = logger.getLoggingEvents().get(0);
+    assertThat(entryLoggingEvent.getLevel()).isEqualTo(Level.TRACE);
+    assertThat(entryLoggingEvent.getMessage()).startsWith("entry to");
+    assertThat(entryLoggingEvent.getArguments()).containsExactly(methodName, arguments);
+
+    LoggingEvent exitLoggingEvent = logger.getLoggingEvents().get(1);
+
+    assertThat(exitLoggingEvent.getLevel()).isEqualTo(Level.TRACE);
+    assertThat(exitLoggingEvent.getMessage()).startsWith("exit from");
+
+    if (returnValue == null) {
+      assertThat(exitLoggingEvent.getArguments()).containsExactly(methodName);
+    } else {
+      assertThat(exitLoggingEvent.getMessage()).contains("Returning: ");
+      assertThat(exitLoggingEvent.getArguments()).containsExactly(methodName, returnValue);
+    }
+  }
+
+  static class LoggingTestClass {
+    public void logInternalMethod() {}
+
+    @SuppressWarnings("UnusedReturnValue")
+    String logInternalMethodWithReturnValue() {
+      return "test string";
+    }
+
+    @SuppressWarnings("UnusedReturnValue")
+    public String logInternalMethodWithReturnValueNull() {
+      return null;
+    }
+
+    @SuppressWarnings("unused")
+    public void logInternalMethodWithArguments(String param) {}
+
+    @SuppressWarnings({"UnusedReturnValue", "unused"})
+    public String logInternalMethodWithReturnValueAndArguments(String param) {
+      return "return value";
+    }
+
+    public void logInternalMethodWrapper() {
+      logInternalMethodPrivate();
+    }
+
+    @SuppressWarnings("unused")
+    public void callsExternalMethod() {
+      String sum = String.valueOf(5);
+    }
+
+    @NoLogging
+    public void doNotLogInternalMethod() {}
+
+    private void logInternalMethodPrivate() {}
+  }
+
+  @NoLogging
+  static class NoLoggingTestClass {
+    public void doNotLogInternalMethod() {}
+  }
+
+  static class NoLoggingTestSubClass extends NoLoggingTestClass {}
+}

common/taskana-common-logging/src/test/resources/log4j2-test.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="info">
+  <Appenders>
+
+    <Console name="Console" target="SYSTEM_OUT">
+      <PatternLayout
+        pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
+    </Console>
+
+  </Appenders>
+ 
+  <Loggers>
+    <Root level="TRACE">
+      <AppenderRef ref="Console" />
+    </Root>
+
+  </Loggers>
+</Configuration>

common/taskana-common-security/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>

common/taskana-common-security/src/main/java/pro/taskana/common/internal/security/CurrentUserContextImpl.java

@@ -30,10 +30,14 @@ public class CurrentUserContextImpl implements CurrentUserContext {
     this.shouldUseLowerCaseForAccessIds = shouldUseLowerCaseForAccessIds;
     try {
       Class.forName(WSSUBJECT_CLASSNAME);
-      LOGGER.debug("WSSubject detected. Assuming that Taskana runs on IBM WebSphere.");
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("WSSubject detected. Assuming that Taskana runs on IBM WebSphere.");
+      }
       runningOnWebSphere = true;
     } catch (ClassNotFoundException e) {
-      LOGGER.debug("No WSSubject detected. Using JAAS subject further on.");
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("No WSSubject detected. Using JAAS subject further on.");
+      }
       runningOnWebSphere = false;
     }
   }
@@ -79,10 +83,14 @@ public class CurrentUserContextImpl implements CurrentUserContext {
       Method getCallerSubjectMethod =
           wsSubjectClass.getMethod(GET_CALLER_SUBJECT_METHOD, (Class<?>[]) null);
       Subject callerSubject = (Subject) getCallerSubjectMethod.invoke(null, (Object[]) null);
-      LOGGER.debug("Subject of caller: {}", callerSubject);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Subject of caller: {}", callerSubject);
+      }
       if (callerSubject != null) {
         Set<Object> publicCredentials = callerSubject.getPublicCredentials();
-        LOGGER.debug("Public credentials of caller: {}", publicCredentials);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("Public credentials of caller: {}", publicCredentials);
+        }
         return publicCredentials.stream()
             .map(
                 // we could use CheckedFunction#wrap here, but this either requires a dependency

common/taskana-common-test/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-common</artifactId>
@@ -110,4 +115,4 @@
     </dependency>
   </dependencies>
 
-</project>
+</project>

common/taskana-common/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-common-security</artifactId>
@@ -36,6 +41,11 @@
     </dependency>
 
     <!-- test dependencies -->
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-simple</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter</artifactId>

common/taskana-common/src/main/java/pro/taskana/common/internal/configuration/DbSchemaCreator.java

@@ -56,10 +56,12 @@ public class DbSchemaCreator {
    */
   public void run() throws SQLException {
     try (Connection connection = dataSource.getConnection()) {
-      LOGGER.debug(
-          "Using database of type {} with url '{}'",
-          connection.getMetaData().getDatabaseProductName(),
-          connection.getMetaData().getURL());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Using database of type {} with url '{}'",
+            connection.getMetaData().getDatabaseProductName(),
+            connection.getMetaData().getURL());
+      }
       ScriptRunner runner = getScriptRunnerInstance(connection);
       String dbProductId =
           DB.getDatabaseProductId(connection.getMetaData().getDatabaseProductName());
@@ -72,7 +74,9 @@ public class DbSchemaCreator {
         runner.runScript(getSqlSchemaNameParsed(reader));
       }
     }
-    LOGGER.debug(outWriter.toString());
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(outWriter.toString());
+    }
     if (!errorWriter.toString().trim().isEmpty()) {
       LOGGER.error(errorWriter.toString());
     }
@@ -82,7 +86,9 @@ public class DbSchemaCreator {
     try (Connection connection = dataSource.getConnection()) {
       connection.setSchema(this.schemaName);
       SqlRunner runner = new SqlRunner(connection);
-      LOGGER.debug(connection.getMetaData().toString());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(connection.getMetaData().toString());
+      }
 
       String query =
           "select VERSION from TASKANA_SCHEMA_VERSION where "
@@ -100,7 +106,9 @@ public class DbSchemaCreator {
             expectedMinVersion);
         return false;
       } else {
-        LOGGER.debug("Schema version is valid.");
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("Schema version is valid.");
+        }
         return true;
       }
 
@@ -164,13 +172,17 @@ public class DbSchemaCreator {
         BufferedReader reader = new BufferedReader(inputReader)) {
       runner.runScript(getSqlSchemaNameParsed(reader));
     } catch (RuntimeSqlException | IOException e) {
-      LOGGER.debug("Schema does not exist.");
-      if (!errorWriter.toString().trim().isEmpty()) {
-        LOGGER.debug(errorWriter.toString());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Schema does not exist.");
+        if (!errorWriter.toString().trim().isEmpty()) {
+          LOGGER.debug(errorWriter.toString());
+        }
       }
       return false;
     }
-    LOGGER.debug("Schema does exist.");
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Schema does exist.");
+    }
     return true;
   }
 

common/taskana-common/src/main/java/pro/taskana/common/internal/configuration/SecurityVerifier.java

@@ -26,13 +26,6 @@ public class SecurityVerifier {
   }
 
   public void checkSecureAccess(boolean securityEnabled) {
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          String.format(
-              "Entering checkSecureAccess with securityEnabled set to %b", securityEnabled));
-    }
-
     try (Connection connection = dataSource.getConnection()) {
 
       if (LOGGER.isDebugEnabled()) {
@@ -54,14 +47,18 @@ public class SecurityVerifier {
       }
     } catch (SQLException ex) {
 
-      LOGGER.debug(
-          String.format(
-              "Security-mode is not yet set. Setting security flag to %b", securityEnabled));
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            String.format(
+                "Security-mode is not yet set. Setting security flag to %b", securityEnabled));
+      }
 
       setInitialSecurityMode(securityEnabled);
     }
 
-    LOGGER.debug("Security-mode is enabled");
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Security-mode is enabled");
+    }
   }
 
   private void setInitialSecurityMode(boolean securityEnabled) {

common/taskana-common/src/main/java/pro/taskana/common/internal/persistence/MapTypeHandler.java

@@ -22,7 +22,9 @@ public class MapTypeHandler extends BaseTypeHandler<Map<String, Object>> {
       PreparedStatement ps, int i, Map<String, Object> parameter, JdbcType jdbcType)
       throws SQLException {
     if (parameter != null && parameter.size() > 0) {
-      LOGGER.debug("Input-Map before serializing: {}", parameter);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Input-Map before serializing: {}", parameter);
+      }
       // Convert Map to JSON string
       JSONObject jsonObj = new JSONObject(parameter);
       ps.setString(i, jsonObj.toString());

common/taskana-common/src/main/java/pro/taskana/common/internal/util/ObjectAttributeChangeDetector.java

@@ -9,15 +9,11 @@ import java.util.Optional;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
 import org.json.JSONObject;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.exceptions.SystemException;
 
 public class ObjectAttributeChangeDetector {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(ObjectAttributeChangeDetector.class);
-
   private ObjectAttributeChangeDetector() {}
 
   /**
@@ -30,11 +26,6 @@ public class ObjectAttributeChangeDetector {
    * @throws SystemException when any parameter is null
    */
   public static <T> String determineChangesInAttributes(T oldObject, T newObject) {
-    LOGGER.debug(
-        "Entry to determineChangesInAttributes (oldObject = {}, newObject = {}",
-        oldObject,
-        newObject);
-
     List<Field> fields = new ArrayList<>();
 
     if (Objects.isNull(oldObject) || Objects.isNull(newObject)) {
@@ -85,10 +76,6 @@ public class ObjectAttributeChangeDetector {
     JSONObject changes = new JSONObject();
     changes.put("changes", changedAttributes);
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from determineChangesInAttributes(), returning {}", changes);
-    }
-
     return changes.toString();
   }
 
@@ -100,12 +87,6 @@ public class ObjectAttributeChangeDetector {
   }
 
   private static <T> String compareLists(T oldObject, T newObject) {
-
-    LOGGER.debug(
-        "Entry to determineChangesInAttributes (oldObject = {}, newObject = {}",
-        oldObject,
-        newObject);
-
     if (!oldObject.equals(newObject)) {
       JSONObject changedAttribute = new JSONObject();
 
@@ -116,16 +97,8 @@ public class ObjectAttributeChangeDetector {
 
       changes.put("changes", changedAttribute);
 
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug("Exit from determineChangesInAttributes(), returning {}", changes);
-      }
       return changes.toString();
     }
-
-    LOGGER.debug(
-        "Exit from determineChangesInAttributes(), "
-            + "returning empty String because there are no changed attributes");
-
     return "";
   }
 }

history/taskana-loghistory-provider/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-core</artifactId>
@@ -59,4 +64,4 @@
   </dependencies>
 
 
-</project>
+</project>

history/taskana-loghistory-provider/src/main/java/pro/taskana/loghistory/impl/LogfileHistoryServiceImpl.java

@@ -105,13 +105,17 @@ public class LogfileHistoryServiceImpl implements TaskanaHistory {
           LOGGER.error("taskana properties file {} was not found on classpath.", propertiesFile);
         } else {
           props.load(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
-          LOGGER.debug("properties were loaded from file {} from classpath.", propertiesFile);
+          if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug("properties were loaded from file {} from classpath.", propertiesFile);
+          }
         }
       } else {
         try (FileInputStream stream = new FileInputStream(propertiesFile)) {
           props.load(stream);
         }
-        LOGGER.debug("properties were loaded from file {}.", propertiesFile);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("properties were loaded from file {}.", propertiesFile);
+        }
       }
     } catch (IOException e) {
       LOGGER.error("caught IOException when processing properties file {}.", propertiesFile);

history/taskana-simplehistory-provider/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-core</artifactId>

history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/ClassificationHistoryQueryImpl.java

@@ -414,7 +414,6 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
 
   @Override
   public List<ClassificationHistoryEvent> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<ClassificationHistoryEvent> result = new ArrayList<>();
     try {
       taskanaHistoryEngine.openConnection();
@@ -425,16 +424,11 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<ClassificationHistoryEvent> list(int offset, int limit) {
-    LOGGER.debug("entry to list({},{}), this = {}", offset, limit, this);
     List<ClassificationHistoryEvent> result = new ArrayList<>();
     try {
       taskanaHistoryEngine.openConnection();
@@ -446,23 +440,12 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       ClassificationHistoryQueryColumnName dbColumnName, SortDirection sortDirection) {
-    LOGGER.debug(
-        "entry to listValues() of column {} with sortDirection {}, this {}",
-        dbColumnName,
-        sortDirection,
-        this);
     List<String> result = new ArrayList<>();
     this.columnName = dbColumnName;
     List<String> cacheOrderBy = new ArrayList<>(this.orderBy);
@@ -481,16 +464,11 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       this.columnName = null;
       this.orderColumns.remove(orderColumns.size() - 1);
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public ClassificationHistoryEvent single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     ClassificationHistoryEvent result = null;
     try {
 
@@ -503,13 +481,11 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", result);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaHistoryEngine.openConnection();
@@ -520,7 +496,6 @@ public class ClassificationHistoryQueryImpl implements ClassificationHistoryQuer
       return -1;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/SimpleHistoryServiceImpl.java

@@ -62,7 +62,6 @@ public class SimpleHistoryServiceImpl implements TaskanaHistory {
       LOGGER.error("Error while inserting task history event into database", e);
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("Exit from create(TaskHistoryEvent event). Returning object = {}.", event);
     }
   }
 
@@ -79,7 +78,6 @@ public class SimpleHistoryServiceImpl implements TaskanaHistory {
       LOGGER.error("Error while inserting workbasket history event into database", e);
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("Exit from create(WorkbasketHistoryEvent event). Returning object = {}.", event);
     }
   }
 
@@ -96,19 +94,12 @@ public class SimpleHistoryServiceImpl implements TaskanaHistory {
       LOGGER.error("Error while inserting classification history event into database", e);
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug(
-          "Exit from create(ClassificationHistoryEvent event). Returning object = {}.", event);
     }
   }
 
   @Override
   public void deleteHistoryEventsByTaskIds(List<String> taskIds)
       throws InvalidArgumentException, NotAuthorizedException {
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to deleteHistoryEventsByTaskIds(taskIds = {})", taskIds);
-    }
-
     taskanaHistoryEngine.checkRoleMembership(TaskanaRole.ADMIN);
 
     if (taskIds == null) {
@@ -123,14 +114,12 @@ public class SimpleHistoryServiceImpl implements TaskanaHistory {
     } catch (SQLException e) {
       LOGGER.error("Caught exception while trying to delete history events", e);
     } finally {
-      LOGGER.debug("exit from deleteHistoryEventsByTaskIds()");
       taskanaHistoryEngine.returnConnection();
     }
   }
 
   public TaskHistoryEvent getTaskHistoryEvent(String historyEventId)
       throws TaskanaHistoryEventNotFoundException {
-    LOGGER.debug("entry to getTaskHistoryEvent (id = {})", historyEventId);
     TaskHistoryEvent resultEvent = null;
     try {
       taskanaHistoryEngine.openConnection();
@@ -149,7 +138,6 @@ public class SimpleHistoryServiceImpl implements TaskanaHistory {
       return resultEvent;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from getHistoryEvent(). Returning result {} ", resultEvent);
     }
   }
 

history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/TaskHistoryQueryImpl.java

@@ -625,7 +625,6 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
 
   @Override
   public List<TaskHistoryEvent> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<TaskHistoryEvent> result = new ArrayList<>();
     try {
       taskanaHistoryEngine.openConnection();
@@ -636,16 +635,11 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<TaskHistoryEvent> list(int offset, int limit) {
-    LOGGER.debug("entry to list({},{}), this = {}", offset, limit, this);
     List<TaskHistoryEvent> result = new ArrayList<>();
     try {
       taskanaHistoryEngine.openConnection();
@@ -657,23 +651,12 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       TaskHistoryQueryColumnName dbColumnName, SortDirection sortDirection) {
-    LOGGER.debug(
-        "entry to listValues() of column {} with sortDirection {}, this {}",
-        dbColumnName,
-        sortDirection,
-        this);
     List<String> result = new ArrayList<>();
     this.columnName = dbColumnName;
     this.orderBy.clear();
@@ -689,16 +672,11 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
     } finally {
       this.orderColumns.remove(orderColumns.size() - 1);
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public TaskHistoryEvent single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     TaskHistoryEvent result = null;
     try {
       taskanaHistoryEngine.openConnection();
@@ -711,13 +689,11 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", result);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaHistoryEngine.openConnection();
@@ -728,7 +704,6 @@ public class TaskHistoryQueryImpl implements TaskHistoryQuery {
       return -1;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/WorkbasketHistoryQueryImpl.java

@@ -466,7 +466,6 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
 
   @Override
   public List<WorkbasketHistoryEvent> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<WorkbasketHistoryEvent> result = new ArrayList<>();
     try {
       taskanaHistoryEngine.openConnection();
@@ -477,16 +476,11 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<WorkbasketHistoryEvent> list(int offset, int limit) {
-    LOGGER.debug("entry to list({},{}), this = {}", offset, limit, this);
     List<WorkbasketHistoryEvent> result = new ArrayList<>();
     try {
       taskanaHistoryEngine.openConnection();
@@ -498,23 +492,12 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       WorkbasketHistoryQueryColumnName dbColumnName, SortDirection sortDirection) {
-    LOGGER.debug(
-        "entry to listValues() of column {} with sortDirection {}, this {}",
-        dbColumnName,
-        sortDirection,
-        this);
     List<String> result = new ArrayList<>();
     this.columnName = dbColumnName;
     List<String> cacheOrderBy = this.orderBy;
@@ -533,16 +516,11 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       this.columnName = null;
       this.orderColumns.remove(orderColumns.size() - 1);
       taskanaHistoryEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public WorkbasketHistoryEvent single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     WorkbasketHistoryEvent result = null;
     try {
       taskanaHistoryEngine.openConnection();
@@ -554,13 +532,11 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       return result;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", result);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaHistoryEngine.openConnection();
@@ -571,7 +547,6 @@ public class WorkbasketHistoryQueryImpl implements WorkbasketHistoryQuery {
       return -1;
     } finally {
       taskanaHistoryEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

history/taskana-simplehistory-provider/src/main/java/pro/taskana/simplehistory/impl/jobs/HistoryCleanupJob.java

@@ -196,12 +196,6 @@ public class HistoryCleanupJob extends AbstractTaskanaJob {
   }
 
   private int deleteHistoryEventsTransactionally(List<String> taskIdsToDeleteHistoryEventsFor) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to deleteHistoryEventsTransactionally(taskIdsToDeleteHistoryEventsFor = {})",
-          taskIdsToDeleteHistoryEventsFor);
-    }
-
     int deletedEventsCount = 0;
     if (txProvider != null) {
       int count =
@@ -215,7 +209,6 @@ public class HistoryCleanupJob extends AbstractTaskanaJob {
                       return 0;
                     }
                   });
-      LOGGER.debug("exit from deleteHistoryEventsTransactionally(), returning {}", count);
       return count;
     } else {
       try {
@@ -224,19 +217,11 @@ public class HistoryCleanupJob extends AbstractTaskanaJob {
         LOGGER.warn("Could not delete history events.", e);
       }
     }
-    LOGGER.debug(
-        "exit from deleteHistoryEventsTransactionally()(), returning {}", deletedEventsCount);
     return deletedEventsCount;
   }
 
   private int deleteEvents(List<String> taskIdsToDeleteHistoryEventsFor)
       throws InvalidArgumentException, NotAuthorizedException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to deleteEvents(taskIdsToDeleteHistoryEventsFor = {})",
-          taskIdsToDeleteHistoryEventsFor);
-    }
-
     SimpleHistoryServiceImpl simpleHistoryService =
         (SimpleHistoryServiceImpl) taskanaHistoryEngine.getTaskanaHistoryService();
 
@@ -250,19 +235,18 @@ public class HistoryCleanupJob extends AbstractTaskanaJob {
 
     simpleHistoryService.deleteHistoryEventsByTaskIds(taskIdsToDeleteHistoryEventsFor);
 
-    LOGGER.debug("{} events deleted.", deletedTasksCount);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("{} events deleted.", deletedTasksCount);
+    }
 
-    LOGGER.debug("exit from deleteEvents(), returning {}", taskIdsToDeleteHistoryEventsFor.size());
     return deletedTasksCount;
   }
 
   private void scheduleNextCleanupJob() {
-    LOGGER.debug("Entry to scheduleNextCleanupJob.");
     ScheduledJob job = new ScheduledJob();
     job.setType(Type.HISTORYCLEANUPJOB);
     job.setDue(getNextDueForCleanupJob());
     taskanaEngineImpl.getJobService().createJob(job);
-    LOGGER.debug("Exit from scheduleNextCleanupJob.");
   }
 
   private void initJobParameters(Properties props) {
@@ -294,11 +278,13 @@ public class HistoryCleanupJob extends AbstractTaskanaJob {
       }
     }
 
-    LOGGER.debug("Configured number of history events per transaction: {}", batchSize);
-    LOGGER.debug("HistoryCleanupJob configuration: runs every {}", runEvery);
-    LOGGER.debug(
-        "HistoryCleanupJob configuration: minimum age of history events to be cleanup up is {}",
-        minimumAge);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Configured number of history events per transaction: {}", batchSize);
+      LOGGER.debug("HistoryCleanupJob configuration: runs every {}", runEvery);
+      LOGGER.debug(
+          "HistoryCleanupJob configuration: minimum age of history events to be cleanup up is {}",
+          minimumAge);
+    }
   }
 
   private Properties readPropertiesFromFile(String propertiesFile) {
@@ -312,13 +298,17 @@ public class HistoryCleanupJob extends AbstractTaskanaJob {
           LOGGER.error("taskana properties file {} was not found on classpath.", propertiesFile);
         } else {
           props.load(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
-          LOGGER.debug(
-              "taskana properties were loaded from file {} from classpath.", propertiesFile);
+          if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug(
+                "taskana properties were loaded from file {} from classpath.", propertiesFile);
+          }
         }
       } else {
         try (FileInputStream fileInputStream = new FileInputStream(propertiesFile)) {
           props.load(fileInputStream);
-          LOGGER.debug("taskana properties were loaded from file {}.", propertiesFile);
+          if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug("taskana properties were loaded from file {}.", propertiesFile);
+          }
         }
       }
     } catch (IOException e) {

history/taskana-simplehistory-provider/src/test/java/acceptance/events/task/DeleteHistoryEventsOnTaskDeletionAccTest.java

@@ -26,8 +26,7 @@ class DeleteHistoryEventsOnTaskDeletionAccTest extends AbstractAccTest {
 
   @Test
   @WithAccessId(user = "admin")
-  void should_DeleteHistoryEvents_When_TaskIsDeleted_With_HistoryDeletionEnabled()
-      throws Exception {
+  void should_DeleteHistoryEvents_When_TaskIsDeletedWithHistoryDeletionEnabled() throws Exception {
 
     final String taskid = "TKI:000000000000000000000000000000000036";
     taskanaEngineConfiguration.setDeleteHistoryOnTaskDeletionEnabled(true);
@@ -57,7 +56,7 @@ class DeleteHistoryEventsOnTaskDeletionAccTest extends AbstractAccTest {
 
   @Test
   @WithAccessId(user = "admin")
-  void should_DeleteHistoryEvents_When_TasksAreDeleted_With_HistoryDeletionEnabled()
+  void should_DeleteHistoryEvents_When_TasksAreDeletedWithHistoryDeletionEnabled()
       throws Exception {
 
     final String taskId_1 = "TKI:000000000000000000000000000000000037";
@@ -97,7 +96,7 @@ class DeleteHistoryEventsOnTaskDeletionAccTest extends AbstractAccTest {
 
   @Test
   @WithAccessId(user = "admin")
-  void should_NotDeleteHistoryEvents_When_TaskIsDeleted_With_HistoryDeletionDisabled()
+  void should_NotDeleteHistoryEvents_When_TaskIsDeletedWithHistoryDeletionDisabled()
       throws Exception {
 
     final String taskId = "TKI:000000000000000000000000000000000039";
@@ -129,7 +128,7 @@ class DeleteHistoryEventsOnTaskDeletionAccTest extends AbstractAccTest {
 
   @Test
   @WithAccessId(user = "admin")
-  void should_NotDeleteHistoryEvents_When_TasksAreDeleted_With_HistoryDeletionDisabled()
+  void should_NotDeleteHistoryEvents_When_TasksAreDeletedWithHistoryDeletionDisabled()
       throws Exception {
     final String taskId_1 = "TKI:000000000000000000000000000000000040";
     final String taskId_2 = "TKI:000000000000000000000000000000000068";

history/taskana-simplehistory-rest-spring/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana.history</groupId>
       <artifactId>taskana-simplehistory-provider</artifactId>

history/taskana-simplehistory-rest-spring/src/main/java/pro/taskana/simplehistory/rest/TaskHistoryEventController.java

@@ -5,8 +5,6 @@ import java.sql.SQLException;
 import java.util.List;
 import java.util.function.BiConsumer;
 import javax.servlet.http.HttpServletRequest;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.MediaTypes;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
@@ -38,8 +36,6 @@ import pro.taskana.spi.history.api.exceptions.TaskanaHistoryEventNotFoundExcepti
 @EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
 public class TaskHistoryEventController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TaskHistoryEventController.class);
-
   private final SimpleHistoryServiceImpl simpleHistoryService;
   private final TaskHistoryEventRepresentationModelAssembler assembler;
 
@@ -91,10 +87,6 @@ public class TaskHistoryEventController {
     ResponseEntity<TaskHistoryEventPagedRepresentationModel> response =
         ResponseEntity.ok(pagedResources);
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTaskHistoryEvents(), returning {}", response);
-    }
-
     return response;
   }
 
@@ -111,21 +103,9 @@ public class TaskHistoryEventController {
   @Transactional(readOnly = true, rollbackFor = Exception.class)
   public ResponseEntity<TaskHistoryEventRepresentationModel> getTaskHistoryEvent(
       @PathVariable String historyEventId) throws TaskanaHistoryEventNotFoundException {
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to getTaskHistoryEvent(historyEventId= {})", historyEventId);
-    }
-
     TaskHistoryEvent resultEvent = simpleHistoryService.getTaskHistoryEvent(historyEventId);
 
     TaskHistoryEventRepresentationModel taskEventResource = assembler.toModel(resultEvent);
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "Exit from getTaskHistoryEvent, returning {}",
-          new ResponseEntity<>(taskEventResource, HttpStatus.OK));
-    }
-
     return new ResponseEntity<>(taskEventResource, HttpStatus.OK);
   }
 

lib/taskana-cdi-example/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>javax</groupId>
       <artifactId>javaee-api</artifactId>

lib/taskana-cdi/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>javax</groupId>
       <artifactId>javaee-api</artifactId>
@@ -112,4 +117,4 @@
       <url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
     </repository>
   </repositories>
-</project>
+</project>

lib/taskana-cdi/src/main/java/pro/taskana/common/internal/TaskanaProducers.java

@@ -49,7 +49,9 @@ public class TaskanaProducers {
       dataSource = (DataSource) ctx.lookup(properties.getProperty("datasource.jndi"));
       try (Connection connection = dataSource.getConnection()) {
         DatabaseMetaData metaData = connection.getMetaData();
-        LOGGER.debug("---------------> {}", metaData);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("---------------> {}", metaData);
+        }
       }
       this.taskanaEngineConfiguration =
           new TaskanaEngineConfiguration(dataSource, true, false, "TASKANA");

lib/taskana-core/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-common</artifactId>

lib/taskana-core/src/main/java/pro/taskana/TaskanaEngineConfiguration.java

@@ -147,8 +147,10 @@ public class TaskanaEngineConfiguration {
   }
 
   public void initTaskanaProperties(String propertiesFile, String separator) {
-    LOGGER.debug(
-        "Reading taskana configuration from {} with separator {}", propertiesFile, separator);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "Reading taskana configuration from {} with separator {}", propertiesFile, separator);
+    }
     Properties props = readPropertiesFromFile(propertiesFile);
     initTaskanaRoles(props, separator);
     initJobParameters(props);
@@ -409,18 +411,20 @@ public class TaskanaEngineConfiguration {
             Boolean::parseBoolean)
         .ifPresent(this::setTaskCleanupJobAllCompletedSameParentBusiness);
 
-    LOGGER.debug(
-        "Configured number of task and workbasket updates per transaction: {}", jobBatchSize);
-    LOGGER.debug("Number of retries of failed task updates: {}", maxNumberOfJobRetries);
-    LOGGER.debug("CleanupJob configuration: first run at {}", cleanupJobFirstRun);
-    LOGGER.debug("CleanupJob configuration: runs every {}", cleanupJobRunEvery);
-    LOGGER.debug(
-        "CleanupJob configuration: minimum age of tasks to be cleanup up is {}",
-        cleanupJobMinimumAge);
-    LOGGER.debug(
-        "TaskCleanupJob configuration: all completed task with the "
-            + "same parent business property id {}",
-        taskCleanupJobAllCompletedSameParentBusiness);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "Configured number of task and workbasket updates per transaction: {}", jobBatchSize);
+      LOGGER.debug("Number of retries of failed task updates: {}", maxNumberOfJobRetries);
+      LOGGER.debug("CleanupJob configuration: first run at {}", cleanupJobFirstRun);
+      LOGGER.debug("CleanupJob configuration: runs every {}", cleanupJobRunEvery);
+      LOGGER.debug(
+          "CleanupJob configuration: minimum age of tasks to be cleanup up is {}",
+          cleanupJobMinimumAge);
+      LOGGER.debug(
+          "TaskCleanupJob configuration: all completed task with the "
+              + "same parent business property id {}",
+          taskCleanupJobAllCompletedSameParentBusiness);
+    }
   }
 
   private void initDomains(Properties props) {
@@ -428,7 +432,9 @@ public class TaskanaEngineConfiguration {
         p -> splitStringAndTrimElements(p, ",", String::toUpperCase);
     parseProperty(props, TASKANA_DOMAINS_PROPERTY, parseFunction).ifPresent(this::setDomains);
 
-    LOGGER.debug("Configured domains: {}", domains);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Configured domains: {}", domains);
+    }
   }
 
   private void initClassificationTypes(Properties props) {
@@ -437,7 +443,9 @@ public class TaskanaEngineConfiguration {
     parseProperty(props, TASKANA_CLASSIFICATION_TYPES_PROPERTY, parseFunction)
         .ifPresent(this::setClassificationTypes);
 
-    LOGGER.debug("Configured classificationTypes: {}", classificationTypes);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Configured classificationTypes: {}", classificationTypes);
+    }
   }
 
   private void initClassificationCategories(Properties props) {
@@ -457,7 +465,9 @@ public class TaskanaEngineConfiguration {
             .map(type -> Pair.of(type, getClassificationCategoriesForType.apply(type)))
             .collect(Collectors.toMap(Pair::getLeft, Pair::getRight));
 
-    LOGGER.debug("Configured classification categories : {}", classificationCategoriesByTypeMap);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Configured classification categories : {}", classificationCategoriesByTypeMap);
+    }
   }
 
   private void initBooleanProperty(
@@ -484,7 +494,9 @@ public class TaskanaEngineConfiguration {
       LOGGER.error("Caught exception when attempting to initialize the schema name", ex);
     }
 
-    LOGGER.debug("Using schema name {}", this.getSchemaName());
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Using schema name {}", this.getSchemaName());
+    }
   }
 
   private void initTaskanaRoles(Properties props, String rolesSeparator) {
@@ -527,7 +539,9 @@ public class TaskanaEngineConfiguration {
                 .collect(Collectors.toList());
     parseProperty(props, TASKANA_CUSTOM_HOLIDAY, parseFunction).ifPresent(this::addCustomHolidays);
 
-    LOGGER.debug("Configured custom Holidays : {}", customHolidays);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Configured custom Holidays : {}", customHolidays);
+    }
   }
 
   private CustomHoliday createCustomHolidayFromPropsEntry(String customHolidayEntry)
@@ -559,11 +573,9 @@ public class TaskanaEngineConfiguration {
 
   private Properties readPropertiesFromFile(String propertiesFile) {
     Properties props = new Properties();
-    try {
-      try (InputStream stream =
-          FileLoaderUtil.openFileFromClasspathOrSystem(propertiesFile, getClass())) {
-        props.load(stream);
-      }
+    try (InputStream stream =
+        FileLoaderUtil.openFileFromClasspathOrSystem(propertiesFile, getClass())) {
+      props.load(stream);
     } catch (IOException e) {
       LOGGER.error("caught IOException when processing properties file {}.", propertiesFile);
       throw new SystemException(

lib/taskana-core/src/main/java/pro/taskana/classification/api/ClassificationService.java

@@ -66,7 +66,7 @@ public interface ClassificationService {
       throws ClassificationInUseException, ClassificationNotFoundException, NotAuthorizedException;
 
   /**
-   * Inserts  a new Classification after adding default values. <br>
+   * Inserts a new Classification after adding default values. <br>
    * The Classification will be added to master-domain, too - if not already existing. <br>
    * The default values are:
    *

lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationQueryImpl.java

@@ -5,8 +5,6 @@ import java.util.Arrays;
 import java.util.List;
 import org.apache.ibatis.exceptions.PersistenceException;
 import org.apache.ibatis.session.RowBounds;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.classification.api.ClassificationCustomField;
 import pro.taskana.classification.api.ClassificationQuery;
@@ -28,7 +26,7 @@ public class ClassificationQueryImpl implements ClassificationQuery {
   private static final String LINK_TO_VALUEMAPPER =
       "pro.taskana.classification.internal.ClassificationQueryMapper."
           + "queryClassificationColumnValues";
-  private static final Logger LOGGER = LoggerFactory.getLogger(ClassificationQueryImpl.class);
+
   private final InternalTaskanaEngine taskanaEngine;
   private final List<String> orderBy;
   private final List<String> orderColumns;
@@ -325,7 +323,6 @@ public class ClassificationQueryImpl implements ClassificationQuery {
 
   @Override
   public List<ClassificationSummary> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<ClassificationSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -333,16 +330,11 @@ public class ClassificationQueryImpl implements ClassificationQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<ClassificationSummary> list(int offset, int limit) {
-    LOGGER.debug("entry to list(offset = {}, limit = {}), this = {}", offset, limit, this);
     List<ClassificationSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -360,19 +352,12 @@ public class ClassificationQueryImpl implements ClassificationQuery {
       throw e;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       ClassificationQueryColumnName columnName, SortDirection sortDirection) {
-    LOGGER.debug("Entry to listValues(dbColumnName={}) this = {}", columnName, this);
     List<String> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -383,16 +368,11 @@ public class ClassificationQueryImpl implements ClassificationQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public ClassificationSummary single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     ClassificationSummary result = null;
     try {
       taskanaEngine.openConnection();
@@ -400,13 +380,11 @@ public class ClassificationQueryImpl implements ClassificationQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", result);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaEngine.openConnection();
@@ -414,7 +392,6 @@ public class ClassificationQueryImpl implements ClassificationQuery {
       return (rowCount == null) ? 0L : rowCount;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/classification/internal/ClassificationServiceImpl.java

@@ -61,7 +61,6 @@ public class ClassificationServiceImpl implements ClassificationService {
   @Override
   public Classification getClassification(String key, String domain)
       throws ClassificationNotFoundException {
-    LOGGER.debug("entry to getClassification(key = {}, domain = {})", key, domain);
     if (key == null) {
       throw new ClassificationNotFoundException(
           null, domain, "Classification for null key and domain " + domain + " was not found.");
@@ -81,7 +80,6 @@ public class ClassificationServiceImpl implements ClassificationService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from getClassification(). Returning result {} ", result);
     }
   }
 
@@ -90,7 +88,6 @@ public class ClassificationServiceImpl implements ClassificationService {
     if (id == null) {
       throw new ClassificationNotFoundException(null, "Classification for null id is invalid.");
     }
-    LOGGER.debug("entry to getClassification(id = {})", id);
     Classification result = null;
     try {
       taskanaEngine.openConnection();
@@ -102,14 +99,12 @@ public class ClassificationServiceImpl implements ClassificationService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from getClassification(). Returning result {} ", result);
     }
   }
 
   @Override
   public void deleteClassification(String classificationId)
       throws ClassificationInUseException, ClassificationNotFoundException, NotAuthorizedException {
-    LOGGER.debug("entry to deleteClassification(id = {})", classificationId);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -166,14 +161,12 @@ public class ClassificationServiceImpl implements ClassificationService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteClassification()");
     }
   }
 
   @Override
   public void deleteClassification(String classificationKey, String domain)
       throws ClassificationInUseException, ClassificationNotFoundException, NotAuthorizedException {
-    LOGGER.debug("entry to deleteClassification(key = {}, domain = {})", classificationKey, domain);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -191,7 +184,6 @@ public class ClassificationServiceImpl implements ClassificationService {
       deleteClassification(classification.getId());
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteClassification(key,domain)");
     }
   }
 
@@ -199,7 +191,6 @@ public class ClassificationServiceImpl implements ClassificationService {
   public Classification createClassification(Classification classification)
       throws ClassificationAlreadyExistException, NotAuthorizedException, DomainNotFoundException,
           InvalidArgumentException {
-    LOGGER.debug("entry to createClassification(classification = {})", classification);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     if (!taskanaEngine.domainExists(classification.getDomain())
         && !"".equals(classification.getDomain())) {
@@ -239,14 +230,15 @@ public class ClassificationServiceImpl implements ClassificationService {
                 details));
       }
 
-      LOGGER.debug("Method createClassification created classification {}.", classificationImpl);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Method createClassification created classification {}.", classificationImpl);
+      }
 
       if (!classification.getDomain().isEmpty()) {
         addClassificationToMasterDomain(classificationImpl);
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from createClassification()");
     }
     return classificationImpl;
   }
@@ -255,7 +247,6 @@ public class ClassificationServiceImpl implements ClassificationService {
   public Classification updateClassification(Classification classification)
       throws NotAuthorizedException, ConcurrencyException, ClassificationNotFoundException,
           InvalidArgumentException {
-    LOGGER.debug("entry to updateClassification(Classification = {})", classification);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     ClassificationImpl classificationImpl;
     try {
@@ -291,12 +282,13 @@ public class ClassificationServiceImpl implements ClassificationService {
                 taskanaEngine.getEngine().getCurrentUserContext().getUserid(),
                 details));
       }
-      LOGGER.debug(
-          "Method updateClassification() updated the classification {}.", classificationImpl);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Method updateClassification() updated the classification {}.", classificationImpl);
+      }
       return classification;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from updateClassification().");
     }
   }
 
@@ -402,10 +394,12 @@ public class ClassificationServiceImpl implements ClassificationService {
         throw new ClassificationAlreadyExistException(masterClassification);
       } catch (ClassificationNotFoundException e) {
         doesExist = false;
-        LOGGER.debug(
-            "Method createClassification: Classification does not "
-                + "exist in master domain. Classification {}.",
-            masterClassification);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "Method createClassification: Classification does not "
+                  + "exist in master domain. Classification {}.",
+              masterClassification);
+        }
       } catch (ClassificationAlreadyExistException ex) {
         LOGGER.warn(
             "Method createClassification: Classification does already exist "
@@ -414,10 +408,12 @@ public class ClassificationServiceImpl implements ClassificationService {
       } finally {
         if (!doesExist) {
           classificationMapper.insert(masterClassification);
-          LOGGER.debug(
-              "Method createClassification: Classification created in "
-                  + "master-domain, too. Classification {}.",
-              masterClassification);
+          if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug(
+                "Method createClassification: Classification created in "
+                    + "master-domain, too. Classification {}.",
+                masterClassification);
+          }
         }
       }
     }

lib/taskana-core/src/main/java/pro/taskana/classification/internal/jobs/ClassificationChangedJob.java

@@ -53,12 +53,14 @@ public class ClassificationChangedJob extends AbstractTaskanaJob {
   private void scheduleTaskRefreshJobs(List<String> affectedTaskIds) {
     int batchSize = taskanaEngineImpl.getConfiguration().getMaxNumberOfUpdatesPerTransaction();
     List<List<String>> affectedTaskBatches = partition(affectedTaskIds, batchSize);
-    LOGGER.debug(
-        "Creating {} TaskRefreshJobs out of {} affected tasks "
-            + "with a maximum number of {} tasks each. ",
-        affectedTaskBatches.size(),
-        affectedTaskIds.size(),
-        batchSize);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "Creating {} TaskRefreshJobs out of {} affected tasks "
+              + "with a maximum number of {} tasks each. ",
+          affectedTaskBatches.size(),
+          affectedTaskIds.size(),
+          batchSize);
+    }
     for (List<String> taskIdBatch : affectedTaskBatches) {
       Map<String, String> args = new HashMap<>();
       if (!taskIdBatch.isEmpty()) {

lib/taskana-core/src/main/java/pro/taskana/common/internal/JobServiceImpl.java

@@ -26,76 +26,75 @@ public class JobServiceImpl implements JobService {
 
   @Override
   public ScheduledJob createJob(ScheduledJob job) {
-    LOGGER.debug("Entry to createJob({})", job);
     try {
       taskanaEngineImpl.openConnection();
       job = initializeJobDefault(job);
       Integer jobId = jobMapper.insertJob(job);
       job.setJobId(jobId);
-      LOGGER.debug("Created job {}", job);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Created job {}", job);
+      }
     } finally {
       taskanaEngineImpl.returnConnection();
     }
-    LOGGER.debug("Exit from createJob");
     return job;
   }
 
   public void deleteJobs(Type jobType) {
-    LOGGER.debug("entry to deleteJobs(jobType = {})", jobType);
     try {
       taskanaEngineImpl.openConnection();
       jobMapper.deleteMultiple(jobType);
-      LOGGER.debug("Deleted jobs of type: {}", jobType);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Deleted jobs of type: {}", jobType);
+      }
     } finally {
       taskanaEngineImpl.returnConnection();
-      LOGGER.debug("exit from deleteJobs()");
     }
   }
 
   public ScheduledJob lockJob(ScheduledJob job, String owner) {
-    LOGGER.debug("entry to lockJob(jobId = {}, owner = {})", job.getJobId(), owner);
     try {
       taskanaEngineImpl.openConnection();
       job.setLockedBy(owner);
       job.setLockExpires(Instant.now().plusMillis(DEFAULT_LOCK_EXPIRATION_PERIOD));
       job.setRetryCount(job.getRetryCount() - 1);
       jobMapper.update(job);
-      LOGGER.debug("Job {} locked. Remaining retries: {}", job.getJobId(), job.getRetryCount());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Job {} locked. Remaining retries: {}", job.getJobId(), job.getRetryCount());
+      }
     } finally {
       taskanaEngineImpl.returnConnection();
-      LOGGER.debug("exit from lockJob()");
     }
     return job;
   }
 
   public List<ScheduledJob> findJobsToRun() {
-    LOGGER.debug("entry to findJobsToRun");
     List<ScheduledJob> availableJobs;
     try {
       taskanaEngineImpl.openConnection();
       availableJobs = jobMapper.findJobsToRun(Instant.now());
-      LOGGER.debug("Found available jobs: {}", availableJobs);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Found available jobs: {}", availableJobs);
+      }
     } finally {
       taskanaEngineImpl.returnConnection();
-      LOGGER.debug("exit from findJobsToRun()");
     }
     return availableJobs;
   }
 
   public void deleteJob(ScheduledJob job) {
-    LOGGER.debug("entry to deleteJob(jobId = {})", job.getJobId());
     try {
       taskanaEngineImpl.openConnection();
       jobMapper.delete(job);
-      LOGGER.debug("Deleted job: {}", job);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Deleted job: {}", job);
+      }
     } finally {
       taskanaEngineImpl.returnConnection();
-      LOGGER.debug("exit from deleteJob()");
     }
   }
 
   private ScheduledJob initializeJobDefault(ScheduledJob job) {
-    LOGGER.debug("entry to initializeJobDefault(job = {})", job);
     job.setCreated(Instant.now());
     job.setState(ScheduledJob.State.READY);
     job.setPriority(JOB_DEFAULT_PRIORITY);
@@ -103,7 +102,9 @@ public class JobServiceImpl implements JobService {
       job.setDue(Instant.now());
     }
     job.setRetryCount(taskanaEngineImpl.getEngine().getConfiguration().getMaxNumberOfJobRetries());
-    LOGGER.debug("Job after initialization: {}", job);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Job after initialization: {}", job);
+    }
     return job;
   }
 }

lib/taskana-core/src/main/java/pro/taskana/common/internal/jobs/JobRunner.java

@@ -37,7 +37,6 @@ public class JobRunner {
   }
 
   public void runJobs() {
-    LOGGER.info("entry to runJobs()");
     try {
       List<ScheduledJob> jobsToRun = findAndLockJobsToRun();
       for (ScheduledJob scheduledJob : jobsToRun) {
@@ -45,8 +44,6 @@ public class JobRunner {
       }
     } catch (Exception e) {
       LOGGER.error("Error occurred while running jobs: ", e);
-    } finally {
-      LOGGER.info("exit from runJobs().");
     }
   }
 
@@ -66,7 +63,9 @@ public class JobRunner {
     } else {
       lockedJob = lockJob(job);
     }
-    LOGGER.debug("Locked job: {}", lockedJob);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Locked job: {}", lockedJob);
+    }
     return lockedJob;
   }
 
@@ -103,7 +102,6 @@ public class JobRunner {
   }
 
   private void runScheduledJob(ScheduledJob scheduledJob) {
-    LOGGER.debug("entry to runScheduledJob(job = {})", scheduledJob);
 
     if (taskanaEngine.isUserInRole(TaskanaRole.ADMIN)) {
       // we run already as admin
@@ -125,7 +123,6 @@ public class JobRunner {
         LOGGER.warn("Attempt to run job {} failed.", scheduledJob, e);
       }
     }
-    LOGGER.debug("exit from runScheduledJob");
   }
 
   private void runScheduledJobImpl(ScheduledJob scheduledJob) {

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/ClassificationCategoryReportBuilderImpl.java

@@ -2,8 +2,6 @@ package pro.taskana.monitor.internal.reports;
 
 import java.time.Instant;
 import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.TaskanaRole;
 import pro.taskana.common.api.exceptions.InvalidArgumentException;
@@ -22,9 +20,6 @@ public class ClassificationCategoryReportBuilderImpl
     extends TimeIntervalReportBuilderImpl<Builder, MonitorQueryItem, TimeIntervalColumnHeader>
     implements ClassificationCategoryReport.Builder {
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(ClassificationCategoryReportBuilderImpl.class);
-
   public ClassificationCategoryReportBuilderImpl(
       InternalTaskanaEngine taskanaEngine, MonitorMapper monitorMapper) {
     super(taskanaEngine, monitorMapper);
@@ -39,7 +34,6 @@ public class ClassificationCategoryReportBuilderImpl
   @Override
   public ClassificationCategoryReport buildReport(TaskTimestamp timestamp)
       throws InvalidArgumentException, NotAuthorizedException {
-    LOGGER.debug("entry to buildReport(), this = {}", this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR);
     try {
       this.taskanaEngine.openConnection();
@@ -62,7 +56,6 @@ public class ClassificationCategoryReportBuilderImpl
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildReport().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/ClassificationReportBuilderImpl.java

@@ -5,8 +5,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.classification.api.ClassificationService;
 import pro.taskana.classification.api.models.ClassificationSummary;
@@ -30,8 +28,6 @@ public class ClassificationReportBuilderImpl
     extends TimeIntervalReportBuilderImpl<Builder, MonitorQueryItem, TimeIntervalColumnHeader>
     implements ClassificationReport.Builder {
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(ClassificationReportBuilderImpl.class);
   private final ClassificationService classificationService;
 
   public ClassificationReportBuilderImpl(
@@ -49,7 +45,6 @@ public class ClassificationReportBuilderImpl
   @Override
   public ClassificationReport buildReport(TaskTimestamp timestamp)
       throws InvalidArgumentException, NotAuthorizedException {
-    LOGGER.debug("entry to buildReport(), this = {}", this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR, TaskanaRole.ADMIN);
     try {
       this.taskanaEngine.openConnection();
@@ -86,7 +81,6 @@ public class ClassificationReportBuilderImpl
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildReport().");
     }
   }
 
@@ -99,7 +93,6 @@ public class ClassificationReportBuilderImpl
   @Override
   public DetailedClassificationReport buildDetailedReport(TaskTimestamp timestamp)
       throws InvalidArgumentException, NotAuthorizedException {
-    LOGGER.debug("entry to buildDetailedReport(), this = {}", this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR, TaskanaRole.ADMIN);
     try {
       this.taskanaEngine.openConnection();
@@ -141,7 +134,6 @@ public class ClassificationReportBuilderImpl
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildDetailedReport().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TaskCustomFieldValueReportBuilderImpl.java

@@ -2,8 +2,6 @@ package pro.taskana.monitor.internal.reports;
 
 import java.time.Instant;
 import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.TaskanaRole;
 import pro.taskana.common.api.exceptions.InvalidArgumentException;
@@ -23,9 +21,6 @@ public class TaskCustomFieldValueReportBuilderImpl
     extends TimeIntervalReportBuilderImpl<Builder, MonitorQueryItem, TimeIntervalColumnHeader>
     implements TaskCustomFieldValueReport.Builder {
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(TaskCustomFieldValueReportBuilderImpl.class);
-
   private final TaskCustomField taskCustomField;
 
   public TaskCustomFieldValueReportBuilderImpl(
@@ -45,7 +40,6 @@ public class TaskCustomFieldValueReportBuilderImpl
   @Override
   public TaskCustomFieldValueReport buildReport(TaskTimestamp timestamp)
       throws InvalidArgumentException, NotAuthorizedException {
-    LOGGER.debug("entry to buildReport(taskCustomField = {}), this = {}", taskCustomField, this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR);
     try {
       this.taskanaEngine.openConnection();
@@ -70,7 +64,6 @@ public class TaskCustomFieldValueReportBuilderImpl
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildReport().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TaskStatusReportBuilderImpl.java

@@ -3,8 +3,6 @@ package pro.taskana.monitor.internal.reports;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.TaskanaRole;
 import pro.taskana.common.api.exceptions.NotAuthorizedException;
@@ -20,7 +18,6 @@ import pro.taskana.workbasket.api.models.WorkbasketSummary;
 /** The implementation of TaskStatusReportBuilder. */
 public class TaskStatusReportBuilderImpl implements TaskStatusReport.Builder {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TaskStatusReportBuilderImpl.class);
   private final InternalTaskanaEngine taskanaEngine;
   private final MonitorMapper monitorMapper;
   private final WorkbasketService workbasketService;
@@ -38,7 +35,6 @@ public class TaskStatusReportBuilderImpl implements TaskStatusReport.Builder {
 
   @Override
   public TaskStatusReport buildReport() throws NotAuthorizedException {
-    LOGGER.debug("entry to buildReport(), this = {}", this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR, TaskanaRole.ADMIN);
     try {
       this.taskanaEngine.openConnection();
@@ -48,20 +44,25 @@ public class TaskStatusReportBuilderImpl implements TaskStatusReport.Builder {
       TaskStatusReport report = new TaskStatusReport(this.states);
       report.addItems(tasks);
       Map<String, String> displayMap =
-          taskanaEngine.getEngine().runAsAdmin(
-              () ->
-                  workbasketService.createWorkbasketQuery()
-                      .keyIn(report.getRows().keySet().toArray(new String[0]))
-                      .domainIn(domains != null ? domains.toArray(new String[0]) : null).list()
-                      .stream()
-                      .collect(
-                          Collectors.toMap(
-                              WorkbasketSummary::getKey, WorkbasketSummary::getName, (a, b) -> a)));
+          taskanaEngine
+              .getEngine()
+              .runAsAdmin(
+                  () ->
+                      workbasketService
+                          .createWorkbasketQuery()
+                          .keyIn(report.getRows().keySet().toArray(new String[0]))
+                          .domainIn(domains != null ? domains.toArray(new String[0]) : null)
+                          .list()
+                          .stream()
+                          .collect(
+                              Collectors.toMap(
+                                  WorkbasketSummary::getKey,
+                                  WorkbasketSummary::getName,
+                                  (a, b) -> a)));
       report.augmentDisplayNames(displayMap);
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildReport().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TimeIntervalReportBuilderImpl.java

@@ -7,8 +7,6 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.TaskanaRole;
 import pro.taskana.common.api.WorkingDaysToDaysConverter;
@@ -40,8 +38,6 @@ abstract class TimeIntervalReportBuilderImpl<
         H extends TimeIntervalColumnHeader>
     implements TimeIntervalReportBuilder<B, I, H> {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TimeIntervalReportBuilder.class);
-
   protected InternalTaskanaEngine taskanaEngine;
   protected MonitorMapper monitorMapper;
   protected List<H> columnHeaders;
@@ -120,12 +116,6 @@ abstract class TimeIntervalReportBuilderImpl<
   public List<String> listTaskIdsForSelectedItems(
       List<SelectedItem> selectedItems, TaskTimestamp timestamp)
       throws NotAuthorizedException, InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to listTaskIdsForSelectedItems(selectedItems = {}), this = {}",
-          selectedItems,
-          this);
-    }
 
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR);
     try {
@@ -162,17 +152,12 @@ abstract class TimeIntervalReportBuilderImpl<
           joinWithAttachments);
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from listTaskIdsForSelectedItems().");
     }
   }
 
   @Override
   public List<String> listCustomAttributeValuesForCustomAttributeName(
       TaskCustomField taskCustomField) throws NotAuthorizedException {
-    LOGGER.debug(
-        "entry to listCustomAttributeValuesForCustomAttributeName(customField = {}), this = {}",
-        taskCustomField,
-        this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR);
     try {
       this.taskanaEngine.openConnection();
@@ -188,7 +173,6 @@ abstract class TimeIntervalReportBuilderImpl<
           taskCustomField);
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from listCustomAttributeValuesForCustomAttributeName().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/TimestampReportBuilderImpl.java

@@ -6,8 +6,6 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.TaskanaRole;
 import pro.taskana.common.api.exceptions.InvalidArgumentException;
@@ -29,7 +27,6 @@ public class TimestampReportBuilderImpl
     extends TimeIntervalReportBuilderImpl<Builder, TimestampQueryItem, TimeIntervalColumnHeader>
     implements TimestampReport.Builder {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TimestampReportBuilderImpl.class);
   private List<TaskTimestamp> status =
       Arrays.asList(TaskTimestamp.CREATED, TaskTimestamp.COMPLETED);
 
@@ -64,7 +61,6 @@ public class TimestampReportBuilderImpl
 
   @Override
   public TimestampReport buildReport() throws NotAuthorizedException, InvalidArgumentException {
-    LOGGER.debug("entry to buildDetailedReport(), this = {}", this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR, TaskanaRole.ADMIN);
     try {
       this.taskanaEngine.openConnection();
@@ -84,7 +80,6 @@ public class TimestampReportBuilderImpl
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildDetailedReport().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/monitor/internal/reports/WorkbasketReportBuilderImpl.java

@@ -4,8 +4,6 @@ import java.time.Instant;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.TaskanaRole;
 import pro.taskana.common.api.exceptions.InvalidArgumentException;
@@ -27,7 +25,6 @@ public class WorkbasketReportBuilderImpl
     extends TimeIntervalReportBuilderImpl<Builder, MonitorQueryItem, TimeIntervalColumnHeader>
     implements WorkbasketReport.Builder {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(WorkbasketReportBuilderImpl.class);
   private final WorkbasketService workbasketService;
   private List<CombinedClassificationFilter> combinedClassificationFilter;
 
@@ -45,7 +42,6 @@ public class WorkbasketReportBuilderImpl
   @Override
   public WorkbasketReport buildReport(TaskTimestamp timestamp)
       throws InvalidArgumentException, NotAuthorizedException {
-    LOGGER.debug("entry to buildReport(), this = {}", this);
     this.taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.MONITOR, TaskanaRole.ADMIN);
     try {
       this.taskanaEngine.openConnection();
@@ -68,22 +64,25 @@ public class WorkbasketReportBuilderImpl
               this.columnHeaders, converter, this.inWorkingDays));
 
       Map<String, String> displayMap =
-          taskanaEngine.getEngine().runAsAdmin(
-              () ->
-                  workbasketService
-                      .createWorkbasketQuery()
-                      .keyIn(report.getRows().keySet().toArray(new String[0]))
-                      .domainIn(domains != null ? domains.toArray(new String[0]) : null)
-                      .list()
-                      .stream()
-                      .collect(
-                          Collectors.toMap(
-                              WorkbasketSummary::getKey, WorkbasketSummary::getName, (a, b) -> a)));
+          taskanaEngine
+              .getEngine()
+              .runAsAdmin(
+                  () ->
+                      workbasketService
+                          .createWorkbasketQuery()
+                          .keyIn(report.getRows().keySet().toArray(new String[0]))
+                          .domainIn(domains != null ? domains.toArray(new String[0]) : null)
+                          .list()
+                          .stream()
+                          .collect(
+                              Collectors.toMap(
+                                  WorkbasketSummary::getKey,
+                                  WorkbasketSummary::getName,
+                                  (a, b) -> a)));
       report.augmentDisplayNames(displayMap);
       return report;
     } finally {
       this.taskanaEngine.returnConnection();
-      LOGGER.debug("exit from buildReport().");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/spi/history/internal/HistoryEventManager.java

@@ -45,7 +45,9 @@ public final class HistoryEventManager {
   }
 
   public void createEvent(TaskHistoryEvent event) {
-    LOGGER.debug("Sending event to history service providers: {}", event);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Sending event to history service providers: {}", event);
+    }
     serviceLoader.forEach(
         historyProvider -> {
           try {
@@ -62,7 +64,9 @@ public final class HistoryEventManager {
   }
 
   public void createEvent(WorkbasketHistoryEvent event) {
-    LOGGER.debug("Sending event to history service providers: {}", event);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Sending event to history service providers: {}", event);
+    }
     serviceLoader.forEach(
         historyProvider -> {
           try {
@@ -79,7 +83,9 @@ public final class HistoryEventManager {
   }
 
   public void createEvent(ClassificationHistoryEvent event) {
-    LOGGER.debug("Sending event to history service providers: {}", event);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Sending event to history service providers: {}", event);
+    }
     serviceLoader.forEach(
         historyProvider -> {
           try {
@@ -97,7 +103,9 @@ public final class HistoryEventManager {
   }
 
   public void deleteEvents(List<String> taskIds) {
-    LOGGER.debug("Sending taskIds to history service providers: {}", taskIds);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Sending taskIds to history service providers: {}", taskIds);
+    }
     serviceLoader.forEach(
         historyProvider -> {
           try {

lib/taskana-core/src/main/java/pro/taskana/spi/routing/internal/TaskRoutingManager.java

@@ -63,10 +63,6 @@ public final class TaskRoutingManager {
    * @return the id of the workbasket in which the task is to be created.
    */
   public String determineWorkbasketId(Task task) {
-    LOGGER.debug(
-        "entry to routeToWorkbasket. TaskRouterr is enabled {}, task = {}",
-        isTaskRoutingEnabled(),
-        task);
     String workbasketId = null;
     if (isTaskRoutingEnabled()) {
       // route to all TaskRoutingProviders
@@ -104,7 +100,6 @@ public final class TaskRoutingManager {
         workbasketId = workbasketIds.stream().findFirst().orElse(null);
       }
     }
-    LOGGER.debug("exit from routeToWorkbasketId. Destination WorkbasketId = {}", workbasketId);
     return workbasketId;
   }
 }

lib/taskana-core/src/main/java/pro/taskana/spi/task/internal/CreateTaskPreprocessorManager.java

@@ -40,7 +40,9 @@ public class CreateTaskPreprocessorManager {
   }
 
   public Task processTaskBeforeCreation(Task taskToProcess) {
-    LOGGER.debug("Sending task to CreateTaskPreprocessor providers: {}", taskToProcess);
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Sending task to CreateTaskPreprocessor providers: {}", taskToProcess);
+    }
     serviceLoader.forEach(
         createTaskPreprocessorProvider -> {
           try {

lib/taskana-core/src/main/java/pro/taskana/task/api/models/ObjectReference.java

@@ -1,14 +1,11 @@
 package pro.taskana.task.api.models;
 
 import java.util.Objects;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.exceptions.InvalidArgumentException;
 
 /** ObjectReference entity. */
 public class ObjectReference {
-  private static final Logger LOGGER = LoggerFactory.getLogger(ObjectReference.class);
   private String id;
   private String company;
   private String system;
@@ -28,7 +25,6 @@ public class ObjectReference {
 
   public static void validate(ObjectReference objectReference, String objRefType, String objName)
       throws InvalidArgumentException {
-    LOGGER.debug("entry to validateObjectReference()");
     // check that all values in the ObjectReference are set correctly
     if (objectReference == null) {
       throw new InvalidArgumentException(
@@ -43,7 +39,6 @@ public class ObjectReference {
       throw new InvalidArgumentException(
           String.format("Value of %s of %s must not be empty", objRefType, objName));
     }
-    LOGGER.debug("exit from validateObjectReference()");
   }
 
   public String getId() {

lib/taskana-core/src/main/java/pro/taskana/task/internal/AttachmentHandler.java

@@ -37,7 +37,6 @@ public class AttachmentHandler {
 
   List<Attachment> augmentAttachmentsByClassification(
       List<AttachmentImpl> attachmentImpls, BulkOperationResults<String, Exception> bulkLog) {
-    LOGGER.debug("entry to augmentAttachmentsByClassification()");
     List<Attachment> result = new ArrayList<>();
     if (attachmentImpls == null || attachmentImpls.isEmpty()) {
       return result;
@@ -73,18 +72,12 @@ public class AttachmentHandler {
       }
     }
 
-    LOGGER.debug("exit from augmentAttachmentsByClassification()");
     return result;
   }
 
   void insertAndDeleteAttachmentsOnTaskUpdate(TaskImpl newTaskImpl, TaskImpl oldTaskImpl)
       throws AttachmentPersistenceException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to insertAndDeleteAttachmentsOnTaskUpdate(oldTaskImpl = {}, newTaskImpl = {})",
-          oldTaskImpl,
-          newTaskImpl);
-    }
+
     List<Attachment> newAttachments =
         newTaskImpl.getAttachments().stream().filter(Objects::nonNull).collect(Collectors.toList());
     newTaskImpl.setAttachments(newAttachments);
@@ -92,12 +85,6 @@ public class AttachmentHandler {
     deleteRemovedAttachmentsOnTaskUpdate(newTaskImpl, oldTaskImpl);
     insertNewAttachmentsOnTaskUpdate(newTaskImpl, oldTaskImpl);
     updateModifiedAttachmentsOnTaskUpdate(newTaskImpl, oldTaskImpl);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "exit from insertAndDeleteAttachmentsOnTaskUpdate(oldTaskImpl = {}, newTaskImpl = {})",
-          oldTaskImpl,
-          newTaskImpl);
-    }
   }
 
   void updateModifiedAttachmentsOnTaskUpdate(TaskImpl newTaskImpl, TaskImpl oldTaskImpl) {
@@ -157,12 +144,6 @@ public class AttachmentHandler {
   }
 
   void deleteRemovedAttachmentsOnTaskUpdate(TaskImpl newTaskImpl, TaskImpl oldTaskImpl) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to deleteRemovedAttachmentsOnTaskUpdate(oldTaskImpl = {}, newTaskImpl = {})",
-          oldTaskImpl,
-          newTaskImpl);
-    }
 
     final List<Attachment> newAttachments = newTaskImpl.getAttachments();
     List<String> newAttachmentIds = new ArrayList<>();
@@ -177,28 +158,30 @@ public class AttachmentHandler {
           a -> {
             if (!newAttIds.contains(a.getId())) {
               attachmentMapper.delete(a.getId());
-              LOGGER.debug(
-                  "TaskService.updateTask() for TaskId={} DELETED an Attachment={}.",
-                  newTaskImpl.getId(),
-                  a);
+              if (LOGGER.isDebugEnabled()) {
+                LOGGER.debug(
+                    "TaskService.updateTask() for TaskId={} DELETED an Attachment={}.",
+                    newTaskImpl.getId(),
+                    a);
+              }
             }
           });
     }
-    LOGGER.debug("exit from deleteRemovedAttachmentsOnTaskUpdate()");
   }
 
   void insertNewAttachmentOnTaskUpdate(TaskImpl newTaskImpl, Attachment attachment)
       throws AttachmentPersistenceException {
-    LOGGER.debug("entry to insertNewAttachmentOnTaskUpdate()");
     AttachmentImpl attachmentImpl = (AttachmentImpl) attachment;
     initAttachment(attachmentImpl, newTaskImpl);
 
     try {
       attachmentMapper.insert(attachmentImpl);
-      LOGGER.debug(
-          "TaskService.updateTask() for TaskId={} INSERTED an Attachment={}.",
-          newTaskImpl.getId(),
-          attachmentImpl);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "TaskService.updateTask() for TaskId={} INSERTED an Attachment={}.",
+            newTaskImpl.getId(),
+            attachmentImpl);
+      }
     } catch (PersistenceException e) {
       throw new AttachmentPersistenceException(
           String.format(
@@ -206,11 +189,9 @@ public class AttachmentHandler {
               attachmentImpl.getId(), newTaskImpl.getId()),
           e.getCause());
     }
-    LOGGER.debug("exit from insertNewAttachmentOnTaskUpdate(), returning");
   }
 
   void initAttachment(AttachmentImpl attachment, Task newTask) {
-    LOGGER.debug("entry to initAttachment()");
     if (attachment.getId() == null) {
       attachment.setId(IdGenerator.generateWithPrefix(IdGenerator.ID_PREFIX_ATTACHMENT));
     }
@@ -223,21 +204,21 @@ public class AttachmentHandler {
     if (attachment.getTaskId() == null) {
       attachment.setTaskId(newTask.getId());
     }
-    LOGGER.debug("exit from initAttachment()");
   }
 
   private void initializeAndInsertAttachment(TaskImpl task, AttachmentImpl attachmentImpl)
       throws AttachmentPersistenceException, InvalidArgumentException {
-    LOGGER.debug("entry to initializeAndInsertAttachment()");
     initAttachment(attachmentImpl, task);
     ObjectReference objRef = attachmentImpl.getObjectReference();
     ObjectReference.validate(objRef, "ObjectReference", "Attachment");
     try {
       attachmentMapper.insert(attachmentImpl);
-      LOGGER.debug(
-          "TaskService.updateTask() for TaskId={} INSERTED an Attachment={}.",
-          task.getId(),
-          attachmentImpl);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "TaskService.updateTask() for TaskId={} INSERTED an Attachment={}.",
+            task.getId(),
+            attachmentImpl);
+      }
     } catch (PersistenceException e) {
       throw new AttachmentPersistenceException(
           String.format(
@@ -245,6 +226,5 @@ public class AttachmentHandler {
               attachmentImpl.getId(), task.getId()),
           e.getCause());
     }
-    LOGGER.debug("exit from initializeAndInsertAttachment()");
   }
 }

lib/taskana-core/src/main/java/pro/taskana/task/internal/ObjectReferenceQueryImpl.java

@@ -5,8 +5,6 @@ import java.util.Arrays;
 import java.util.List;
 import org.apache.ibatis.exceptions.PersistenceException;
 import org.apache.ibatis.session.RowBounds;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.exceptions.TaskanaRuntimeException;
 import pro.taskana.common.internal.InternalTaskanaEngine;
@@ -23,7 +21,6 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
       "pro.taskana.task.internal.TaskQueryMapper.countQueryObjectReferences";
   private static final String LINK_TO_VALUEMAPPER =
       "pro.taskana.task.internal.TaskQueryMapper.queryObjectReferenceColumnValues";
-  private static final Logger LOGGER = LoggerFactory.getLogger(ObjectReferenceQueryImpl.class);
   private final InternalTaskanaEngine taskanaEngine;
   private final List<String> orderBy;
   private ObjectReferenceQueryColumnName columnName;
@@ -70,7 +67,6 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
 
   @Override
   public List<ObjectReference> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<ObjectReference> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -78,16 +74,11 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<ObjectReference> list(int offset, int limit) {
-    LOGGER.debug("entry to list(offset = {}, limit = {}), this = {}", offset, limit, this);
     List<ObjectReference> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -105,19 +96,12 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
       throw e;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       ObjectReferenceQueryColumnName columnName, SortDirection sortDirection) {
-    LOGGER.debug("Entry to listValues(dbColumnName={}) this = {}", columnName, this);
     List<String> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -128,16 +112,11 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public ObjectReference single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     ObjectReference result = null;
     try {
       taskanaEngine.openConnection();
@@ -145,13 +124,11 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", result);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaEngine.openConnection();
@@ -159,7 +136,6 @@ public class ObjectReferenceQueryImpl implements ObjectReferenceQuery {
       return (rowCount == null) ? 0L : rowCount;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskCommentServiceImpl.java

@@ -37,13 +37,9 @@ class TaskCommentServiceImpl {
 
   TaskComment newTaskComment(String taskId) {
 
-    LOGGER.debug("entry to newTaskComment (taskId = {})", taskId);
-
     TaskCommentImpl taskComment = new TaskCommentImpl();
     taskComment.setTaskId(taskId);
 
-    LOGGER.debug("exit from newTaskComment(), returning {}", taskComment);
-
     return taskComment;
   }
 
@@ -51,8 +47,6 @@ class TaskCommentServiceImpl {
       throws NotAuthorizedException, ConcurrencyException, TaskCommentNotFoundException,
           TaskNotFoundException, InvalidArgumentException {
 
-    LOGGER.debug("entry to updateTaskComment (taskComment = {})", taskCommentToUpdate);
-
     String userId = taskanaEngine.getEngine().getCurrentUserContext().getUserid();
 
     TaskCommentImpl taskCommentImplToUpdate = (TaskCommentImpl) taskCommentToUpdate;
@@ -73,10 +67,12 @@ class TaskCommentServiceImpl {
 
         taskCommentMapper.update(taskCommentImplToUpdate);
 
-        LOGGER.debug(
-            "Method updateTaskComment() updated taskComment '{}' for user '{}'.",
-            taskCommentImplToUpdate.getId(),
-            userId);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "Method updateTaskComment() updated taskComment '{}' for user '{}'.",
+              taskCommentImplToUpdate.getId(),
+              userId);
+        }
 
       } else {
         throw new NotAuthorizedException(
@@ -88,7 +84,6 @@ class TaskCommentServiceImpl {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from updateTaskComment()");
     }
 
     return taskCommentImplToUpdate;
@@ -97,8 +92,6 @@ class TaskCommentServiceImpl {
   TaskComment createTaskComment(TaskComment taskCommentToCreate)
       throws NotAuthorizedException, TaskNotFoundException, InvalidArgumentException {
 
-    LOGGER.debug("entry to setTaskComment (taskCommentToCreate = {})", taskCommentToCreate);
-
     TaskCommentImpl taskCommentImplToCreate = (TaskCommentImpl) taskCommentToCreate;
 
     try {
@@ -114,10 +107,7 @@ class TaskCommentServiceImpl {
       taskCommentMapper.insert(taskCommentImplToCreate);
 
     } finally {
-
       taskanaEngine.returnConnection();
-
-      LOGGER.debug("exit from setTaskComment()");
     }
 
     return taskCommentImplToCreate;
@@ -127,8 +117,6 @@ class TaskCommentServiceImpl {
       throws NotAuthorizedException, TaskCommentNotFoundException, TaskNotFoundException,
           InvalidArgumentException {
 
-    LOGGER.debug("entry to deleteTaskComment (taskComment = {}", taskCommentId);
-
     String userId = taskanaEngine.getEngine().getCurrentUserContext().getUserid();
 
     try {
@@ -143,7 +131,9 @@ class TaskCommentServiceImpl {
 
         taskCommentMapper.delete(taskCommentId);
 
-        LOGGER.debug("taskComment {} deleted", taskCommentToDelete.getId());
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("taskComment {} deleted", taskCommentToDelete.getId());
+        }
 
       } else {
         throw new NotAuthorizedException(
@@ -156,15 +146,12 @@ class TaskCommentServiceImpl {
 
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteTaskComment()");
     }
   }
 
   List<TaskComment> getTaskComments(String taskId)
       throws NotAuthorizedException, TaskNotFoundException {
 
-    LOGGER.debug("entry to getTaskComments (taskId = {})", taskId);
-
     try {
 
       taskanaEngine.openConnection();
@@ -173,17 +160,14 @@ class TaskCommentServiceImpl {
 
       List<TaskComment> taskComments = new ArrayList<>(taskCommentMapper.findByTaskId(taskId));
 
-      if (taskComments.isEmpty()) {
+      if (taskComments.isEmpty() && LOGGER.isDebugEnabled()) {
         LOGGER.debug("getTaskComments() found no comments for the provided taskId");
       }
 
       return taskComments;
 
     } finally {
-
       taskanaEngine.returnConnection();
-
-      LOGGER.debug("exit from getTaskComments()");
     }
   }
 
@@ -191,8 +175,6 @@ class TaskCommentServiceImpl {
       throws TaskCommentNotFoundException, NotAuthorizedException, TaskNotFoundException,
           InvalidArgumentException {
 
-    LOGGER.debug("entry to getTaskComment (taskCommentId = {})", taskCommentId);
-
     TaskCommentImpl result;
 
     verifyTaskCommentIdIsNotNullOrEmpty(taskCommentId);
@@ -214,10 +196,7 @@ class TaskCommentServiceImpl {
       return result;
 
     } finally {
-
       taskanaEngine.returnConnection();
-
-      LOGGER.debug("exit from getTaskComment()");
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskQueryImpl.java

@@ -919,7 +919,6 @@ public class TaskQueryImpl implements TaskQuery {
   public List<TaskSummary> list() {
     List<TaskSummary> result = new ArrayList<>();
     try {
-      LOGGER.debug("entry to list(), this = {}", this);
       taskanaEngine.openConnection();
       checkForIllegalParamCombinations();
       checkOpenAndReadPermissionForSpecifiedWorkbaskets();
@@ -927,23 +926,16 @@ public class TaskQueryImpl implements TaskQuery {
       setupAccessIds();
       List<TaskSummaryImpl> tasks =
           taskanaEngine.getSqlSession().selectList(getLinkToMapperScript(), this);
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug("mapper returned {} resulting Objects: {} ", tasks.size(), tasks);
-      }
+
       result = taskService.augmentTaskSummariesByContainedSummariesWithPartitioning(tasks);
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<TaskSummary> list(int offset, int limit) {
-    LOGGER.debug("entry to list(offset = {}, limit = {}), this = {}", offset, limit, this);
     List<TaskSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -967,18 +959,11 @@ public class TaskQueryImpl implements TaskQuery {
       throw e;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(TaskQueryColumnName columnName, SortDirection sortDirection) {
-    LOGGER.debug("Entry to listValues(dbColumnName={}) this = {}", columnName, this);
     List<String> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -1006,16 +991,11 @@ public class TaskQueryImpl implements TaskQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public TaskSummary single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     TaskSummary result = null;
     try {
       taskanaEngine.openConnection();
@@ -1036,13 +1016,11 @@ public class TaskQueryImpl implements TaskQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", result);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaEngine.openConnection();
@@ -1053,7 +1031,6 @@ public class TaskQueryImpl implements TaskQuery {
       return (rowCount == null) ? 0L : rowCount;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 
@@ -1627,7 +1604,9 @@ public class TaskQueryImpl implements TaskQuery {
 
   private void checkOpenAndReadPermissionForSpecifiedWorkbaskets() {
     if (taskanaEngine.getEngine().isUserInRole(TaskanaRole.ADMIN, TaskanaRole.TASK_ADMIN)) {
-      LOGGER.debug("Skipping permissions check since user is in role ADMIN or TASK_ADMIN.");
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Skipping permissions check since user is in role ADMIN or TASK_ADMIN.");
+      }
       return;
     }
     try {

lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskServiceImpl.java

@@ -159,7 +159,6 @@ public class TaskServiceImpl implements TaskService {
   public Task createTask(Task taskToCreate)
       throws NotAuthorizedException, WorkbasketNotFoundException, ClassificationNotFoundException,
           TaskAlreadyExistException, InvalidArgumentException {
-    LOGGER.debug("entry to createTask(task = {})", taskToCreate);
 
     if (CreateTaskPreprocessorManager.isCreateTaskPreprocessorEnabled()) {
       taskToCreate = createTaskPreprocessorManager.processTaskBeforeCreation(taskToCreate);
@@ -174,7 +173,9 @@ public class TaskServiceImpl implements TaskService {
         throw new InvalidArgumentException("taskId must be empty when creating a task");
       }
 
-      LOGGER.debug("Task {} cannot be found, so it can be created.", task.getId());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Task {} cannot be found, so it can be created.", task.getId());
+      }
       Workbasket workbasket;
 
       if (task.getWorkbasketSummary().getId() != null) {
@@ -219,7 +220,9 @@ public class TaskServiceImpl implements TaskService {
       setCallbackStateOnTaskCreation(task);
       try {
         this.taskMapper.insert(task);
-        LOGGER.debug("Method createTask() created Task '{}'.", task.getId());
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("Method createTask() created Task '{}'.", task.getId());
+        }
         if (HistoryEventManager.isHistoryEnabled()) {
 
           String details =
@@ -266,13 +269,11 @@ public class TaskServiceImpl implements TaskService {
       return task;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from createTask(task = {})", task);
     }
   }
 
   @Override
   public Task getTask(String id) throws NotAuthorizedException, TaskNotFoundException {
-    LOGGER.debug("entry to getTaskById(id = {})", id);
     TaskImpl resultTask = null;
     try {
       taskanaEngine.openConnection();
@@ -325,7 +326,6 @@ public class TaskServiceImpl implements TaskService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from getTaskById(). Returning result {} ", resultTask);
     }
   }
 
@@ -346,7 +346,6 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public Task setTaskRead(String taskId, boolean isRead)
       throws TaskNotFoundException, NotAuthorizedException {
-    LOGGER.debug("entry to setTaskRead(taskId = {}, isRead = {})", taskId, isRead);
     TaskImpl task = null;
     try {
       taskanaEngine.openConnection();
@@ -354,11 +353,12 @@ public class TaskServiceImpl implements TaskService {
       task.setRead(isRead);
       task.setModified(Instant.now());
       taskMapper.update(task);
-      LOGGER.debug("Method setTaskRead() set read property of Task '{}' to {} ", task, isRead);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Method setTaskRead() set read property of Task '{}' to {} ", task, isRead);
+      }
       return task;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from setTaskRead(taskId, isRead). Returning result {} ", task);
     }
   }
 
@@ -384,13 +384,11 @@ public class TaskServiceImpl implements TaskService {
 
   @Override
   public Task newTask(String workbasketKey, String domain) {
-    LOGGER.debug("entry to newTask(workbasketKey = {}, domain = {})", workbasketKey, domain);
     TaskImpl task = new TaskImpl();
     WorkbasketSummaryImpl wb = new WorkbasketSummaryImpl();
     wb.setKey(workbasketKey);
     wb.setDomain(domain);
     task.setWorkbasketSummary(wb);
-    LOGGER.debug("exit from newTask(), returning {}", task);
     return task;
   }
 
@@ -410,7 +408,6 @@ public class TaskServiceImpl implements TaskService {
           NotAuthorizedException, AttachmentPersistenceException, InvalidStateException,
           ClassificationNotFoundException {
     String userId = taskanaEngine.getEngine().getCurrentUserContext().getUserid();
-    LOGGER.debug("entry to updateTask(task = {}, userId = {})", task, userId);
     TaskImpl newTaskImpl = (TaskImpl) task;
     TaskImpl oldTaskImpl;
     try {
@@ -426,7 +423,9 @@ public class TaskServiceImpl implements TaskService {
 
       taskMapper.update(newTaskImpl);
 
-      LOGGER.debug("Method updateTask() updated task '{}' for user '{}'.", task.getId(), userId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Method updateTask() updated task '{}' for user '{}'.", task.getId(), userId);
+      }
 
       if (HistoryEventManager.isHistoryEnabled()) {
 
@@ -443,7 +442,6 @@ public class TaskServiceImpl implements TaskService {
 
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from claim()");
     }
     return task;
   }
@@ -482,10 +480,6 @@ public class TaskServiceImpl implements TaskService {
   public Task selectAndClaim(TaskQuery taskQuery)
       throws NotAuthorizedException, InvalidOwnerException {
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to selectAndClaim(taskQuery = {})", taskQuery);
-    }
-
     try {
 
       taskanaEngine.openConnection();
@@ -505,7 +499,6 @@ public class TaskServiceImpl implements TaskService {
     } catch (InvalidStateException | TaskNotFoundException e) {
       throw new SystemException("Caught exception ", e);
     } finally {
-      LOGGER.debug("exit from selectAndClaim()");
       taskanaEngine.returnConnection();
     }
   }
@@ -513,9 +506,6 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public BulkOperationResults<String, TaskanaException> deleteTasks(List<String> taskIds)
       throws InvalidArgumentException, NotAuthorizedException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to deleteTasks(tasks = {})", taskIds);
-    }
 
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.ADMIN);
 
@@ -553,7 +543,6 @@ public class TaskServiceImpl implements TaskService {
       }
       return bulkLog;
     } finally {
-      LOGGER.debug("exit from deleteTasks()");
       taskanaEngine.returnConnection();
     }
   }
@@ -574,12 +563,7 @@ public class TaskServiceImpl implements TaskService {
   public List<String> updateTasks(
       ObjectReference selectionCriteria, Map<TaskCustomField, String> customFieldsToUpdate)
       throws InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to updateTasks(selectionCriteria = {}, customFieldsToUpdate = {})",
-          selectionCriteria,
-          customFieldsToUpdate);
-    }
+
     ObjectReference.validate(selectionCriteria, "ObjectReference", "updateTasks call");
     validateCustomFields(customFieldsToUpdate);
     TaskCustomPropertySelector fieldSelector = new TaskCustomPropertySelector();
@@ -600,11 +584,12 @@ public class TaskServiceImpl implements TaskService {
         }
 
       } else {
-        LOGGER.debug("updateTasks() found no tasks for update ");
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("updateTasks() found no tasks for update ");
+        }
       }
       return changedTasks;
     } finally {
-      LOGGER.debug("exit from updateTasks().");
       taskanaEngine.returnConnection();
     }
   }
@@ -613,12 +598,6 @@ public class TaskServiceImpl implements TaskService {
   public List<String> updateTasks(
       List<String> taskIds, Map<TaskCustomField, String> customFieldsToUpdate)
       throws InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to updateTasks(taskIds = {}, customFieldsToUpdate = {})",
-          taskIds,
-          customFieldsToUpdate);
-    }
 
     validateCustomFields(customFieldsToUpdate);
     TaskCustomPropertySelector fieldSelector = new TaskCustomPropertySelector();
@@ -639,11 +618,12 @@ public class TaskServiceImpl implements TaskService {
         }
 
       } else {
-        LOGGER.debug("updateTasks() found no tasks for update ");
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("updateTasks() found no tasks for update ");
+        }
       }
       return changedTasks;
     } finally {
-      LOGGER.debug("exit from updateTasks().");
       taskanaEngine.returnConnection();
     }
   }
@@ -685,9 +665,7 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public BulkOperationResults<String, TaskanaException> setCallbackStateForTasks(
       List<String> externalIds, CallbackState state) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to setCallbackStateForTasks(externalIds = {})", externalIds);
-    }
+
     try {
       taskanaEngine.openConnection();
 
@@ -708,7 +686,6 @@ public class TaskServiceImpl implements TaskService {
       }
       return bulkLog;
     } finally {
-      LOGGER.debug("exit from setCallbckStateForTasks()");
       taskanaEngine.returnConnection();
     }
   }
@@ -716,9 +693,7 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public BulkOperationResults<String, TaskanaException> setOwnerOfTasks(
       String owner, List<String> argTaskIds) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to setOwnerOfTasks(owner = {}, tasks = {})", owner, argTaskIds);
-    }
+
     BulkOperationResults<String, TaskanaException> bulkLog = new BulkOperationResults<>();
     if (argTaskIds == null || argTaskIds.isEmpty()) {
       return bulkLog;
@@ -756,7 +731,6 @@ public class TaskServiceImpl implements TaskService {
       }
       return bulkLog;
     } finally {
-      LOGGER.debug("exit from setOwnerOfTasks()");
       taskanaEngine.returnConnection();
     }
   }
@@ -764,10 +738,6 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public BulkOperationResults<String, TaskanaException> setPlannedPropertyOfTasks(
       Instant planned, List<String> argTaskIds) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to setPlannedPropertyOfTasks(planned = {}, tasks = {})", planned, argTaskIds);
-    }
 
     BulkLog bulkLog = new BulkLog();
     if (argTaskIds == null || argTaskIds.isEmpty()) {
@@ -783,7 +753,6 @@ public class TaskServiceImpl implements TaskService {
       bulkLog.addAllErrors(errorsFromProcessing);
       return bulkLog;
     } finally {
-      LOGGER.debug("exit from setPlannedPropertyOfTasks");
       taskanaEngine.returnConnection();
     }
   }
@@ -791,7 +760,6 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public Task cancelTask(String taskId)
       throws TaskNotFoundException, InvalidStateException, NotAuthorizedException {
-    LOGGER.debug("entry to cancelTask(task = {})", taskId);
 
     Task cancelledTask;
 
@@ -808,7 +776,6 @@ public class TaskServiceImpl implements TaskService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from cancelTask()");
     }
 
     return cancelledTask;
@@ -817,7 +784,6 @@ public class TaskServiceImpl implements TaskService {
   @Override
   public Task terminateTask(String taskId)
       throws TaskNotFoundException, InvalidStateException, NotAuthorizedException {
-    LOGGER.debug("entry to terminateTask(task = {})", taskId);
 
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.ADMIN, TaskanaRole.TASK_ADMIN);
 
@@ -837,15 +803,11 @@ public class TaskServiceImpl implements TaskService {
 
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from terminateTask()");
     }
     return terminatedTask;
   }
 
   public List<String> findTasksIdsAffectedByClassificationChange(String classificationId) {
-    LOGGER.debug(
-        "entry to findTasksIdsAffectedByClassificationChange(classificationId = {})",
-        classificationId);
     // tasks directly affected
     List<TaskSummary> tasksAffectedDirectly =
         createTaskQuery()
@@ -883,15 +845,11 @@ public class TaskServiceImpl implements TaskService {
           classificationId,
           affectedTaskIds);
     }
-    LOGGER.debug("exit from findTasksIdsAffectedByClassificationChange(). ");
     return affectedTaskIds;
   }
 
   public void refreshPriorityAndDueDatesOfTasksOnClassificationUpdate(
       List<String> taskIds, boolean serviceLevelChanged, boolean priorityChanged) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to refreshPriorityAndDueDateOfTasks(tasks = {})", taskIds);
-    }
     Pair<List<MinimalTaskSummary>, BulkLog> resultsPair = getMinimalTaskSummaries(taskIds);
     List<MinimalTaskSummary> tasks = resultsPair.getLeft();
     try {
@@ -912,7 +870,6 @@ public class TaskServiceImpl implements TaskService {
                 });
       }
     } finally {
-      LOGGER.debug("exit from refreshPriorityAndDueDateOfTasks");
       taskanaEngine.returnConnection();
     }
   }
@@ -975,12 +932,6 @@ public class TaskServiceImpl implements TaskService {
 
   void removeNonExistingTasksFromTaskIdList(
       List<String> taskIds, BulkOperationResults<String, TaskanaException> bulkLog) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to removeNonExistingTasksFromTaskIdList(targetWbId = {}, taskIds = {})",
-          taskIds,
-          bulkLog);
-    }
 
     Iterator<String> taskIdIterator = taskIds.iterator();
     while (taskIdIterator.hasNext()) {
@@ -991,16 +942,11 @@ public class TaskServiceImpl implements TaskService {
         taskIdIterator.remove();
       }
     }
-    LOGGER.debug("exit from removeNonExistingTasksFromTaskIdList()");
   }
 
   List<TaskSummary> augmentTaskSummariesByContainedSummariesWithPartitioning(
       List<TaskSummaryImpl> taskSummaries) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to augmentTaskSummariesByContainedSummariesWithPartitioning(taskSummaries= {})",
-          taskSummaries);
-    }
+
     // splitting Augmentation into steps of maximal 32000 tasks
     // reason: DB2 has a maximum for parameters in a query
     List<TaskSummary> result =
@@ -1009,7 +955,6 @@ public class TaskServiceImpl implements TaskService {
             .flatMap(Collection::stream)
             .collect(Collectors.toList());
 
-    LOGGER.debug("exit from to augmentTaskSummariesByContainedSummariesWithPartitioning()");
     return result;
   }
 
@@ -1044,7 +989,6 @@ public class TaskServiceImpl implements TaskService {
   private BulkOperationResults<String, TaskanaException> completeTasks(
       List<String> taskIds, boolean forced) throws InvalidArgumentException {
     try {
-      LOGGER.debug("entry to completeTasks(taskIds = {})", taskIds);
       taskanaEngine.openConnection();
       if (taskIds == null) {
         throw new InvalidArgumentException("TaskIds can't be used as NULL-Parameter.");
@@ -1080,7 +1024,6 @@ public class TaskServiceImpl implements TaskService {
       return bulkLog;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from to completeTasks(taskIds = {})", taskIds);
     }
   }
 
@@ -1154,10 +1097,12 @@ public class TaskServiceImpl implements TaskService {
     task.setCompleted(now);
     task.setState(targetState);
     taskMapper.update(task);
-    LOGGER.debug(
-        "Task '{}' cancelled by user '{}'.",
-        taskId,
-        taskanaEngine.getEngine().getCurrentUserContext().getUserid());
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "Task '{}' cancelled by user '{}'.",
+          taskId,
+          taskanaEngine.getEngine().getCurrentUserContext().getUserid());
+    }
     return task;
   }
 
@@ -1189,8 +1134,6 @@ public class TaskServiceImpl implements TaskService {
       throws TaskNotFoundException, InvalidStateException, InvalidOwnerException,
           NotAuthorizedException {
     String userId = taskanaEngine.getEngine().getCurrentUserContext().getUserid();
-    LOGGER.debug(
-        "entry to claim(id = {}, userId = {}, forceClaim = {})", taskId, userId, forceClaim);
     TaskImpl task;
     try {
       taskanaEngine.openConnection();
@@ -1200,7 +1143,9 @@ public class TaskServiceImpl implements TaskService {
       checkPreconditionsForClaimTask(task, forceClaim);
       claimActionsOnTask(task, userId, now);
       taskMapper.update(task);
-      LOGGER.debug("Task '{}' claimed by user '{}'.", taskId, userId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Task '{}' claimed by user '{}'.", taskId, userId);
+      }
       if (HistoryEventManager.isHistoryEnabled()) {
         historyEventManager.createEvent(
             new TaskClaimedEvent(
@@ -1210,7 +1155,6 @@ public class TaskServiceImpl implements TaskService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from claim()");
     }
     return task;
   }
@@ -1283,11 +1227,6 @@ public class TaskServiceImpl implements TaskService {
       throws TaskNotFoundException, InvalidStateException, InvalidOwnerException,
           NotAuthorizedException {
     String userId = taskanaEngine.getEngine().getCurrentUserContext().getUserid();
-    LOGGER.debug(
-        "entry to cancelClaim(taskId = {}), userId = {}, forceUnclaim = {})",
-        taskId,
-        userId,
-        forceUnclaim);
     TaskImpl task;
     try {
       taskanaEngine.openConnection();
@@ -1308,7 +1247,9 @@ public class TaskServiceImpl implements TaskService {
       task.setRead(true);
       task.setState(TaskState.READY);
       taskMapper.update(task);
-      LOGGER.debug("Task '{}' unclaimed by user '{}'.", taskId, userId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Task '{}' unclaimed by user '{}'.", taskId, userId);
+      }
       if (HistoryEventManager.isHistoryEnabled()) {
         historyEventManager.createEvent(
             new TaskClaimCancelledEvent(
@@ -1318,7 +1259,6 @@ public class TaskServiceImpl implements TaskService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from cancelClaim()");
     }
     return task;
   }
@@ -1327,8 +1267,6 @@ public class TaskServiceImpl implements TaskService {
       throws TaskNotFoundException, InvalidOwnerException, InvalidStateException,
           NotAuthorizedException {
     String userId = taskanaEngine.getEngine().getCurrentUserContext().getUserid();
-    LOGGER.debug(
-        "entry to completeTask(id = {}, userId = {}, isForced = {})", taskId, userId, isForced);
     TaskImpl task;
     try {
       taskanaEngine.openConnection();
@@ -1349,7 +1287,9 @@ public class TaskServiceImpl implements TaskService {
       Instant now = Instant.now();
       completeActionsOnTask(task, userId, now);
       taskMapper.update(task);
-      LOGGER.debug("Task '{}' completed by user '{}'.", taskId, userId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Task '{}' completed by user '{}'.", taskId, userId);
+      }
       if (HistoryEventManager.isHistoryEnabled()) {
         historyEventManager.createEvent(
             new TaskCompletedEvent(
@@ -1359,14 +1299,12 @@ public class TaskServiceImpl implements TaskService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from completeTask()");
     }
     return task;
   }
 
   private void deleteTask(String taskId, boolean forceDelete)
       throws TaskNotFoundException, InvalidStateException, NotAuthorizedException {
-    LOGGER.debug("entry to deleteTask(taskId = {} , forceDelete = {})", taskId, forceDelete);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.ADMIN);
     TaskImpl task;
     try {
@@ -1393,10 +1331,11 @@ public class TaskServiceImpl implements TaskService {
         historyEventManager.deleteEvents(Collections.singletonList(taskId));
       }
 
-      LOGGER.debug("Task {} deleted.", taskId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Task {} deleted.", taskId);
+      }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteTask().");
     }
   }
 
@@ -1404,7 +1343,6 @@ public class TaskServiceImpl implements TaskService {
       BulkOperationResults<String, TaskanaException> bulkLog,
       List<MinimalTaskSummary> taskSummaries,
       Iterator<String> taskIdIterator) {
-    LOGGER.debug("entry to removeSingleTask()");
     String currentTaskId = taskIdIterator.next();
     if (currentTaskId == null || currentTaskId.equals("")) {
       bulkLog.addError(
@@ -1438,7 +1376,6 @@ public class TaskServiceImpl implements TaskService {
         }
       }
     }
-    LOGGER.debug("exit from removeSingleTask()");
   }
 
   private void removeSingleTaskForCallbackStateByExternalId(
@@ -1446,7 +1383,6 @@ public class TaskServiceImpl implements TaskService {
       List<MinimalTaskSummary> taskSummaries,
       Iterator<String> externalIdIterator,
       CallbackState desiredCallbackState) {
-    LOGGER.debug("entry to removeSingleTask()");
     String currentExternalId = externalIdIterator.next();
     if (currentExternalId == null || currentExternalId.equals("")) {
       bulkLog.addError(
@@ -1472,7 +1408,6 @@ public class TaskServiceImpl implements TaskService {
         externalIdIterator.remove();
       }
     }
-    LOGGER.debug("exit from removeSingleTask()");
   }
 
   private boolean desiredCallbackStateCanBeSetForFoundSummary(
@@ -1503,7 +1438,6 @@ public class TaskServiceImpl implements TaskService {
   private void standardSettings(TaskImpl task, Classification classification)
       throws InvalidArgumentException {
     TaskImpl task1 = task;
-    LOGGER.debug("entry to standardSettings()");
     final Instant now = Instant.now();
     task1.setId(IdGenerator.generateWithPrefix(IdGenerator.ID_PREFIX_TASK));
     if (task1.getExternalId() == null) {
@@ -1549,7 +1483,6 @@ public class TaskServiceImpl implements TaskService {
       throw new SystemException(
           "Internal error when trying to insert new Attachments on Task Creation.", e);
     }
-    LOGGER.debug("exit from standardSettings()");
   }
 
   private void setCallbackStateOnTaskCreation(TaskImpl task) throws InvalidArgumentException {
@@ -1571,9 +1504,7 @@ public class TaskServiceImpl implements TaskService {
   }
 
   private void updateTasksToBeCompleted(Stream<TaskSummaryImpl> taskSummaries, Instant now) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to updateTasksToBeCompleted()");
-    }
+
     List<String> taskIds = new ArrayList<>();
     List<String> updateClaimedTaskIds = new ArrayList<>();
     List<TaskSummary> taskSummaryList =
@@ -1607,20 +1538,12 @@ public class TaskServiceImpl implements TaskService {
         createTasksCompletedEvents(taskSummaryList);
       }
     }
-    LOGGER.debug("exit from updateTasksToBeCompleted()");
   }
 
   private void addClassificationSummariesToTaskSummaries(
       List<TaskSummaryImpl> tasks, List<ClassificationSummary> classifications) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to addClassificationSummariesToTaskSummaries(tasks = {}, classifications = {})",
-          tasks,
-          classifications);
-    }
 
     if (tasks == null || tasks.isEmpty()) {
-      LOGGER.debug("exit from addClassificationSummariesToTaskSummaries()");
       return;
     }
     // assign query results to appropriate tasks.
@@ -1642,12 +1565,10 @@ public class TaskServiceImpl implements TaskService {
       // set the classification on the task object
       task.setClassificationSummary(classificationSummary);
     }
-    LOGGER.debug("exit from addClassificationSummariesToTaskSummaries()");
   }
 
   private List<ClassificationSummary> findClassificationsForTasksAndAttachments(
       List<TaskSummaryImpl> taskSummaries, List<AttachmentSummaryImpl> attachmentSummaries) {
-    LOGGER.debug("entry to findClassificationsForTasksAndAttachments()");
     if (taskSummaries == null || taskSummaries.isEmpty()) {
       return new ArrayList<>();
     }
@@ -1662,13 +1583,11 @@ public class TaskServiceImpl implements TaskService {
         classificationIdSet.add(att.getClassificationSummary().getId());
       }
     }
-    LOGGER.debug("exit from findClassificationsForTasksAndAttachments()");
     return queryClassificationsForTasksAndAttachments(classificationIdSet);
   }
 
   private List<ClassificationSummary> findClassificationForTaskImplAndAttachments(
       TaskImpl task, List<AttachmentImpl> attachmentImpls) {
-    LOGGER.debug("entry to transferBulk()");
     Set<String> classificationIdSet =
         new HashSet<>(Collections.singletonList(task.getClassificationSummary().getId()));
     if (attachmentImpls != null && !attachmentImpls.isEmpty()) {
@@ -1676,7 +1595,6 @@ public class TaskServiceImpl implements TaskService {
         classificationIdSet.add(att.getClassificationSummary().getId());
       }
     }
-    LOGGER.debug("exit from findClassificationForTaskImplAndAttachments()");
     return queryClassificationsForTasksAndAttachments(classificationIdSet);
   }
 
@@ -1685,8 +1603,10 @@ public class TaskServiceImpl implements TaskService {
 
     String[] classificationIdArray = classificationIdSet.toArray(new String[0]);
 
-    LOGGER.debug(
-        "getClassificationsForTasksAndAttachments() about to query classifications and exit");
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "getClassificationsForTasksAndAttachments() about to query classifications and exit");
+    }
     // perform classification query
     return this.classificationService
         .createClassificationQuery()
@@ -1695,7 +1615,6 @@ public class TaskServiceImpl implements TaskService {
   }
 
   private void addWorkbasketSummariesToTaskSummaries(List<TaskSummaryImpl> taskSummaries) {
-    LOGGER.debug("entry to addWorkbasketSummariesToTaskSummaries()");
     if (taskSummaries == null || taskSummaries.isEmpty()) {
       return;
     }
@@ -1705,7 +1624,9 @@ public class TaskServiceImpl implements TaskService {
             .map(t -> t.getWorkbasketSummary().getId())
             .distinct()
             .toArray(String[]::new);
-    LOGGER.debug("addWorkbasketSummariesToTaskSummaries() about to query workbaskets");
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("addWorkbasketSummariesToTaskSummaries() about to query workbaskets");
+    }
     WorkbasketQueryImpl query = (WorkbasketQueryImpl) workbasketService.createWorkbasketQuery();
     query.setUsedToAugmentTasks(true);
 
@@ -1728,21 +1649,12 @@ public class TaskServiceImpl implements TaskService {
 
       task.setWorkbasketSummary(workbasketSummary);
     }
-    LOGGER.debug("exit from addWorkbasketSummariesToTaskSummaries()");
   }
 
   private void addAttachmentSummariesToTaskSummaries(
       List<TaskSummaryImpl> taskSummaries,
       List<AttachmentSummaryImpl> attachmentSummaries,
       List<ClassificationSummary> classifications) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to addAttachmentSummariesToTaskSummaries(taskSummaries = {}, "
-              + "attachmentSummaries = {}, classifications = {})",
-          taskSummaries,
-          attachmentSummaries,
-          classifications);
-    }
 
     if (taskSummaries == null || taskSummaries.isEmpty()) {
       return;
@@ -1762,21 +1674,17 @@ public class TaskServiceImpl implements TaskService {
         }
       }
     }
-
-    LOGGER.debug("exit from addAttachmentSummariesToTaskSummaries()");
   }
 
   private void addClassificationSummariesToAttachmentSummaries(
       List<AttachmentSummaryImpl> attachmentSummaries,
       List<TaskSummaryImpl> taskSummaries,
       List<ClassificationSummary> classifications) {
-    LOGGER.debug("entry to addClassificationSummariesToAttachmentSummaries()");
     // prereq: in each attachmentSummary, the classificationSummary.key property is set.
     if (attachmentSummaries == null
         || attachmentSummaries.isEmpty()
         || taskSummaries == null
         || taskSummaries.isEmpty()) {
-      LOGGER.debug("exit from addClassificationSummariesToAttachmentSummaries()");
       return;
     }
     // iterate over all attachment summaries an add the appropriate classification summary to each
@@ -1792,20 +1700,12 @@ public class TaskServiceImpl implements TaskService {
       }
       att.setClassificationSummary(classificationSummary);
     }
-    LOGGER.debug("exit from addClassificationSummariesToAttachmentSummaries()");
   }
 
   private List<Attachment> addClassificationSummariesToAttachments(
       List<AttachmentImpl> attachmentImpls, List<ClassificationSummary> classifications) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to addClassificationSummariesToAttachments(targetWbId = {}, taskIds = {})",
-          attachmentImpls,
-          classifications);
-    }
 
     if (attachmentImpls == null || attachmentImpls.isEmpty()) {
-      LOGGER.debug("exit from addClassificationSummariesToAttachments()");
       return new ArrayList<>();
     }
 
@@ -1824,21 +1724,12 @@ public class TaskServiceImpl implements TaskService {
       att.setClassificationSummary(classificationSummary);
       result.add(att);
     }
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("exit from addClassificationSummariesToAttachments(), returning {}", result);
-    }
 
     return result;
   }
 
   private TaskImpl initUpdatedTask(
       Map<TaskCustomField, String> customFieldsToUpdate, TaskCustomPropertySelector fieldSelector) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to initUpdatedTask(customFieldsToUpdate = {}, fieldSelector = {})",
-          customFieldsToUpdate,
-          fieldSelector);
-    }
 
     TaskImpl newTask = new TaskImpl();
     newTask.setModified(Instant.now());
@@ -1848,25 +1739,16 @@ public class TaskServiceImpl implements TaskService {
       fieldSelector.setCustomProperty(key, true);
       newTask.setCustomAttribute(key, entry.getValue());
     }
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("exit from initUpdatedTask(), returning {}", newTask);
-    }
-
     return newTask;
   }
 
   private void validateCustomFields(Map<TaskCustomField, String> customFieldsToUpdate)
       throws InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to validateCustomFields(customFieldsToUpdate = {})", customFieldsToUpdate);
-    }
 
     if (customFieldsToUpdate == null || customFieldsToUpdate.isEmpty()) {
       throw new InvalidArgumentException(
           "The customFieldsToUpdate argument to updateTasks must not be empty.");
     }
-    LOGGER.debug("exit from validateCustomFields()");
   }
 
   private List<TaskSummary> getTasksToChange(List<String> taskIds) {

lib/taskana-core/src/main/java/pro/taskana/task/internal/TaskTransferrer.java

@@ -61,11 +61,6 @@ class TaskTransferrer {
       String taskId, String destinationWorkbasketKey, String domain, boolean setTransferFlag)
       throws TaskNotFoundException, WorkbasketNotFoundException, NotAuthorizedException,
           InvalidStateException {
-    LOGGER.debug(
-        "entry to transfer(taskId = {}, destinationWorkbasketKey = {}, domain = {})",
-        taskId,
-        destinationWorkbasketKey,
-        domain);
     TaskImpl task = null;
     WorkbasketSummary oldWorkbasketSummary = null;
     try {
@@ -105,10 +100,12 @@ class TaskTransferrer {
       task.setState(TaskState.READY);
       task.setOwner(null);
       taskMapper.update(task);
-      LOGGER.debug(
-          "Method transfer() transferred Task '{}' to destination workbasket {}",
-          taskId,
-          destinationWorkbasket.getId());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Method transfer() transferred Task '{}' to destination workbasket {}",
+            taskId,
+            destinationWorkbasket.getId());
+      }
       if (HistoryEventManager.isHistoryEnabled()) {
         createTaskTransferredEvent(
             task, oldWorkbasketSummary.getId(), destinationWorkbasket.asSummary().getId());
@@ -116,17 +113,13 @@ class TaskTransferrer {
       return task;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from transfer(). Returning result {} ", task);
     }
   }
 
   Task transfer(String taskId, String destinationWorkbasketId, boolean setTransferFlag)
       throws TaskNotFoundException, WorkbasketNotFoundException, NotAuthorizedException,
           InvalidStateException {
-    LOGGER.debug(
-        "entry to transfer(taskId = {}, destinationWorkbasketId = {})",
-        taskId,
-        destinationWorkbasketId);
+
     TaskImpl task = null;
     WorkbasketSummary oldWorkbasketSummary = null;
     try {
@@ -162,17 +155,18 @@ class TaskTransferrer {
       task.setState(TaskState.READY);
       task.setOwner(null);
       taskMapper.update(task);
-      LOGGER.debug(
-          "Method transfer() transferred Task '{}' to destination workbasket {}",
-          taskId,
-          destinationWorkbasketId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Method transfer() transferred Task '{}' to destination workbasket {}",
+            taskId,
+            destinationWorkbasketId);
+      }
       if (HistoryEventManager.isHistoryEnabled()) {
         createTaskTransferredEvent(task, oldWorkbasketSummary.getId(), destinationWorkbasketId);
       }
       return task;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from transfer(). Returning result {} ", task);
     }
   }
 
@@ -184,13 +178,6 @@ class TaskTransferrer {
       throws NotAuthorizedException, InvalidArgumentException, WorkbasketNotFoundException {
     try {
       taskanaEngine.openConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "entry to transferTasks(targetWbKey = {}, domain = {}, taskIds = {})",
-            destinationWorkbasketKey,
-            destinationWorkbasketDomain,
-            taskIds);
-      }
 
       // Check pre-conditions with trowing Exceptions
       if (destinationWorkbasketKey == null || destinationWorkbasketDomain == null) {
@@ -202,15 +189,6 @@ class TaskTransferrer {
 
       return transferTasks(taskIds, destinationWorkbasket, setTransferFlag);
     } finally {
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from transferTasks(targetWbKey = {}, targetWbDomain = {}, "
-                + "destination taskIds = {})",
-            destinationWorkbasketKey,
-            destinationWorkbasketDomain,
-            taskIds);
-      }
-
       taskanaEngine.returnConnection();
     }
   }
@@ -220,12 +198,6 @@ class TaskTransferrer {
       throws NotAuthorizedException, InvalidArgumentException, WorkbasketNotFoundException {
     try {
       taskanaEngine.openConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "entry to transferTasks(targetWbId = {}, taskIds = {})",
-            destinationWorkbasketId,
-            taskIds);
-      }
 
       // Check pre-conditions with trowing Exceptions
       if (destinationWorkbasketId == null || destinationWorkbasketId.isEmpty()) {
@@ -235,13 +207,6 @@ class TaskTransferrer {
 
       return transferTasks(taskIds, destinationWorkbasket, setTransferFlag);
     } finally {
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from transferTasks(targetWbKey = {}, taskIds = {})",
-            destinationWorkbasketId,
-            taskIds);
-      }
-
       taskanaEngine.returnConnection();
     }
   }
@@ -251,12 +216,6 @@ class TaskTransferrer {
       Workbasket destinationWorkbasket,
       boolean setTransferFlag)
       throws InvalidArgumentException, WorkbasketNotFoundException, NotAuthorizedException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to transferTasks(taskIdsToBeTransferred = {}, destinationWorkbasket = {})",
-          taskIdsToBeTransferred,
-          destinationWorkbasket);
-    }
 
     workbasketService.checkAuthorization(
         destinationWorkbasket.getId(), WorkbasketPermission.APPEND);
@@ -276,10 +235,6 @@ class TaskTransferrer {
     taskSummaries = taskMapper.findExistingTasks(taskIds, null);
     checkIfTransferConditionsAreFulfilled(taskIds, taskSummaries, bulkLog);
     updateTasksToBeTransferred(taskIds, taskSummaries, destinationWorkbasket, setTransferFlag);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("exit from transferTasks(), returning {}", bulkLog);
-    }
-
     return bulkLog;
   }
 
@@ -287,14 +242,6 @@ class TaskTransferrer {
       List<String> taskIds,
       List<MinimalTaskSummary> taskSummaries,
       BulkOperationResults<String, TaskanaException> bulkLog) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to checkIfTransferConditionsAreFulfilled(taskIds = {}, "
-              + "taskSummaries = {}, bulkLog = {})",
-          taskIds,
-          taskSummaries,
-          bulkLog);
-    }
 
     Set<String> workbasketIds = new HashSet<>();
     taskSummaries.forEach(t -> workbasketIds.add(t.getWorkbasketId()));
@@ -311,7 +258,6 @@ class TaskTransferrer {
               .list();
     }
     checkIfTasksMatchTransferCriteria(taskIds, taskSummaries, sourceWorkbaskets, bulkLog);
-    LOGGER.debug("exit from checkIfTransferConditionsAreFulfilled()");
   }
 
   private void checkIfTasksMatchTransferCriteria(
@@ -319,15 +265,6 @@ class TaskTransferrer {
       List<MinimalTaskSummary> taskSummaries,
       List<WorkbasketSummary> sourceWorkbaskets,
       BulkOperationResults<String, TaskanaException> bulkLog) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to checkIfTasksMatchTransferCriteria(taskIds = {}, taskSummaries = {}, "
-              + "sourceWorkbaskets = {}, bulkLog = {})",
-          taskIds,
-          taskSummaries,
-          sourceWorkbaskets,
-          bulkLog);
-    }
 
     Iterator<String> taskIdIterator = taskIds.iterator();
     while (taskIdIterator.hasNext()) {
@@ -359,7 +296,6 @@ class TaskTransferrer {
         taskIdIterator.remove();
       }
     }
-    LOGGER.debug("exit from checkIfTasksMatchTransferCriteria()");
   }
 
   private void createTaskTransferredEvent(
@@ -378,14 +314,6 @@ class TaskTransferrer {
       List<MinimalTaskSummary> taskSummaries,
       Workbasket destinationWorkbasket,
       boolean setTransferFlag) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to updateTasksToBeTransferred(taskIds = {}, taskSummaries = {}, "
-              + "destinationWorkbasket = {})",
-          taskIds,
-          taskSummaries,
-          destinationWorkbasket.getId());
-    }
 
     taskSummaries =
         taskSummaries.stream()
@@ -406,7 +334,6 @@ class TaskTransferrer {
         createTasksTransferredEvents(taskSummaries, updateObject);
       }
     }
-    LOGGER.debug("exit from updateTasksToBeTransferred()");
   }
 
   private void createTasksTransferredEvents(

lib/taskana-core/src/main/java/pro/taskana/task/internal/jobs/TaskCleanupJob.java

@@ -82,7 +82,6 @@ public class TaskCleanupJob extends AbstractTaskanaJob {
   }
 
   private List<TaskSummary> getTasksCompletedBefore(Instant untilDate) {
-    LOGGER.debug("entry to getTasksCompletedBefore(untilDate = {})", untilDate);
 
     List<TaskSummary> tasksToDelete =
         taskanaEngineImpl
@@ -127,17 +126,10 @@ public class TaskCleanupJob extends AbstractTaskanaJob {
               .collect(Collectors.toList());
     }
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("exit from getTasksCompletedBefore(), returning {}", tasksToDelete);
-    }
-
     return tasksToDelete;
   }
 
   private int deleteTasksTransactionally(List<TaskSummary> tasksToBeDeleted) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to deleteTasksTransactionally(tasksToBeDeleted = {})", tasksToBeDeleted);
-    }
 
     int deletedTaskCount = 0;
     if (txProvider != null) {
@@ -152,7 +144,6 @@ public class TaskCleanupJob extends AbstractTaskanaJob {
                       return 0;
                     }
                   });
-      LOGGER.debug("exit from deleteTasksTransactionally(), returning {}", count);
       return count;
     } else {
       try {
@@ -161,21 +152,19 @@ public class TaskCleanupJob extends AbstractTaskanaJob {
         LOGGER.warn("Could not delete tasks.", e);
       }
     }
-    LOGGER.debug("exit from deleteTasksTransactionally(), returning {}", deletedTaskCount);
     return deletedTaskCount;
   }
 
   private int deleteTasks(List<TaskSummary> tasksToBeDeleted)
       throws InvalidArgumentException, NotAuthorizedException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to deleteTasks(tasksToBeDeleted = {})", tasksToBeDeleted);
-    }
 
     List<String> tasksIdsToBeDeleted =
         tasksToBeDeleted.stream().map(TaskSummary::getId).collect(Collectors.toList());
     BulkOperationResults<String, TaskanaException> results =
         taskanaEngineImpl.getTaskService().deleteTasks(tasksIdsToBeDeleted);
-    LOGGER.debug("{} tasks deleted.", tasksIdsToBeDeleted.size() - results.getFailedIds().size());
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("{} tasks deleted.", tasksIdsToBeDeleted.size() - results.getFailedIds().size());
+    }
     for (String failedId : results.getFailedIds()) {
       if (LOGGER.isWarnEnabled()) {
         LOGGER.warn(
@@ -184,18 +173,13 @@ public class TaskCleanupJob extends AbstractTaskanaJob {
             LogSanitizer.stripLineBreakingChars(results.getErrorForId(failedId)));
       }
     }
-    LOGGER.debug(
-        "exit from deleteTasks(), returning {}",
-        tasksIdsToBeDeleted.size() - results.getFailedIds().size());
     return tasksIdsToBeDeleted.size() - results.getFailedIds().size();
   }
 
   private void scheduleNextCleanupJob() {
-    LOGGER.debug("Entry to scheduleNextCleanupJob.");
     ScheduledJob job = new ScheduledJob();
     job.setType(ScheduledJob.Type.TASKCLEANUPJOB);
     job.setDue(getNextDueForCleanupJob());
     taskanaEngineImpl.getJobService().createJob(job);
-    LOGGER.debug("Exit from scheduleNextCleanupJob.");
   }
 }

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/AbstractWorkbasketAccessItemQueryImpl.java

@@ -5,8 +5,6 @@ import java.util.Arrays;
 import java.util.List;
 import org.apache.ibatis.exceptions.PersistenceException;
 import org.apache.ibatis.session.RowBounds;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.exceptions.TaskanaRuntimeException;
 import pro.taskana.common.internal.InternalTaskanaEngine;
@@ -27,8 +25,6 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
   private static final String LINK_TO_COUNTER =
       "pro.taskana.workbasket.internal.WorkbasketQueryMapper.countQueryWorkbasketAccessItems";
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(AbstractWorkbasketAccessItemQueryImpl.class);
   private AccessItemQueryColumnName columnName;
   private String[] accessIdIn;
   private String[] workbasketIdIn;
@@ -80,7 +76,6 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
 
   @Override
   public List<T> list() {
-    LOGGER.debug("entry to list(), this = {}", _this());
     List<T> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -90,16 +85,11 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public List<T> list(int offset, int limit) {
-    LOGGER.debug("entry to list(offset = {}, limit = {}), this = {}", offset, limit, _this());
     List<T> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -119,19 +109,12 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
       throw e;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       AccessItemQueryColumnName columnName, SortDirection sortDirection) {
-    LOGGER.debug("Entry to listValues(dbColumnName={}) this = {}", columnName, _this());
     List<String> result = null;
     try {
       taskanaEngine.openConnection();
@@ -142,19 +125,11 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = result == null ? 0 : result.size();
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            result);
-      }
     }
   }
 
   @Override
   public T single() {
-    LOGGER.debug("entry to single(), this = {}", _this());
     T accessItem = null;
     try {
       taskanaEngine.openConnection();
@@ -162,13 +137,11 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
       return accessItem;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", accessItem);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", _this());
     Long rowCount = null;
     try {
       taskanaEngine.openConnection();
@@ -176,7 +149,6 @@ abstract class AbstractWorkbasketAccessItemQueryImpl<
       return (rowCount == null) ? 0L : rowCount;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketAccessItemQueryImpl.java

@@ -5,8 +5,6 @@ import java.util.Arrays;
 import java.util.List;
 import org.apache.ibatis.exceptions.PersistenceException;
 import org.apache.ibatis.session.RowBounds;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.common.api.exceptions.TaskanaRuntimeException;
 import pro.taskana.common.internal.InternalTaskanaEngine;
@@ -24,7 +22,6 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
       "pro.taskana.workbasket.internal.WorkbasketQueryMapper.countQueryWorkbasketAccessItems";
   private static final String LINK_TO_VALUEMAPPER =
       "pro.taskana.workbasket.internal.WorkbasketQueryMapper.queryWorkbasketAccessItemColumnValues";
-  private static final Logger LOGGER = LoggerFactory.getLogger(WorkbasketQueryImpl.class);
   private AccessItemQueryColumnName columnName;
   private String[] accessIdIn;
   private String[] accessIdLike;
@@ -102,19 +99,14 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
 
   @Override
   public List<WorkbasketAccessItem> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<WorkbasketAccessItem> result =
         taskanaEngine.openAndReturnConnection(
             () -> new ArrayList<>(taskanaEngine.getSqlSession().selectList(LINK_TO_MAPPER, this)));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("exit from list(). Returning {} resulting Objects: {} ", result.size(), result);
-    }
     return result;
   }
 
   @Override
   public List<WorkbasketAccessItem> list(int offset, int limit) {
-    LOGGER.debug("entry to list(offset = {}, limit = {}), this = {}", offset, limit, this);
     List<WorkbasketAccessItem> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -134,19 +126,12 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
       throw e;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
   @Override
   public List<String> listValues(
       AccessItemQueryColumnName columnName, SortDirection sortDirection) {
-    LOGGER.debug("Entry to listValues(dbColumnName={}) this = {}", columnName, this);
     List<String> result = null;
     try {
       taskanaEngine.openConnection();
@@ -157,19 +142,11 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = result == null ? 0 : result.size();
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            result);
-      }
     }
   }
 
   @Override
   public WorkbasketAccessItem single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     WorkbasketAccessItem accessItm = null;
     try {
       taskanaEngine.openConnection();
@@ -177,13 +154,11 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
       return accessItm;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", accessItm);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaEngine.openConnection();
@@ -191,7 +166,6 @@ public class WorkbasketAccessItemQueryImpl implements WorkbasketAccessItemQuery
       return (rowCount == null) ? 0L : rowCount;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketQueryImpl.java

@@ -5,8 +5,6 @@ import java.util.Arrays;
 import java.util.List;
 import org.apache.ibatis.exceptions.PersistenceException;
 import org.apache.ibatis.session.RowBounds;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import pro.taskana.TaskanaEngineConfiguration;
 import pro.taskana.common.api.TaskanaRole;
@@ -32,7 +30,6 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       "pro.taskana.workbasket.internal.WorkbasketQueryMapper.countQueryWorkbaskets";
   private static final String LINK_TO_VALUEMAPPER =
       "pro.taskana.workbasket.internal.WorkbasketQueryMapper.queryWorkbasketColumnValues";
-  private static final Logger LOGGER = LoggerFactory.getLogger(WorkbasketQueryImpl.class);
   private WorkbasketQueryColumnName columnName;
   private String[] accessId;
   private String[] idIn;
@@ -362,7 +359,6 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
 
   @Override
   public List<WorkbasketSummary> list() {
-    LOGGER.debug("entry to list(), this = {}", this);
     List<WorkbasketSummary> workbaskets = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -371,19 +367,11 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       return workbaskets;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = workbaskets == null ? 0 : workbaskets.size();
-        LOGGER.debug(
-            "exit from list(). Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            workbaskets);
-      }
     }
   }
 
   @Override
   public List<WorkbasketSummary> list(int offset, int limit) {
-    LOGGER.debug("entry to list(offset = {}, limit = {}), this = {}", offset, limit, this);
     List<WorkbasketSummary> workbaskets = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -402,18 +390,11 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       throw e;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from list(offset,limit). Returning {} resulting Objects: {} ",
-            workbaskets.size(),
-            workbaskets);
-      }
     }
   }
 
   public List<String> listValues(
       WorkbasketQueryColumnName columnName, SortDirection sortDirection) {
-    LOGGER.debug("Entry to listValues(dbColumnName={}) this = {}", columnName, this);
     List<String> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -424,16 +405,11 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "Exit from listValues. Returning {} resulting Objects: {} ", result.size(), result);
-      }
     }
   }
 
   @Override
   public WorkbasketSummary single() {
-    LOGGER.debug("entry to single(), this = {}", this);
     WorkbasketSummary workbasket = null;
     try {
       taskanaEngine.openConnection();
@@ -442,13 +418,11 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       return workbasket;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from single(). Returning result {} ", workbasket);
     }
   }
 
   @Override
   public long count() {
-    LOGGER.debug("entry to count(), this = {}", this);
     Long rowCount = null;
     try {
       taskanaEngine.openConnection();
@@ -457,7 +431,6 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
       return (rowCount == null) ? 0L : rowCount;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from count(). Returning result {} ", rowCount);
     }
   }
 
@@ -669,7 +642,6 @@ public class WorkbasketQueryImpl implements WorkbasketQuery {
         lowercaseAccessIds(this.accessId);
       }
     }
-    LOGGER.debug("exit from handleCallerRolesAndAccessIds, now this is {}", this);
   }
 
   private WorkbasketQuery addOrderCriteria(String colName, SortDirection sortDirection) {

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/WorkbasketServiceImpl.java

@@ -78,7 +78,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   @Override
   public Workbasket getWorkbasket(String workbasketId)
       throws WorkbasketNotFoundException, NotAuthorizedException {
-    LOGGER.debug("entry to getWorkbasket(workbasketId = {})", workbasketId);
     Workbasket result = null;
     try {
       taskanaEngine.openConnection();
@@ -95,14 +94,12 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from getWorkbasket(workbasketId). Returning result {} ", result);
     }
   }
 
   @Override
   public Workbasket getWorkbasket(String workbasketKey, String domain)
       throws WorkbasketNotFoundException, NotAuthorizedException {
-    LOGGER.debug("entry to getWorkbasketByKey(workbasketKey = {})", workbasketKey);
     Workbasket result = null;
     try {
       taskanaEngine.openConnection();
@@ -121,7 +118,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from getWorkbasket(workbasketId). Returning result {} ", result);
     }
   }
 
@@ -129,7 +125,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   public Workbasket createWorkbasket(Workbasket newWorkbasket)
       throws InvalidWorkbasketException, NotAuthorizedException, WorkbasketAlreadyExistException,
           DomainNotFoundException {
-    LOGGER.debug("entry to createWorkbasket(workbasket) with Workbasket {}", newWorkbasket);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
 
     WorkbasketImpl workbasket = (WorkbasketImpl) newWorkbasket;
@@ -163,11 +158,12 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                 taskanaEngine.getEngine().getCurrentUserContext().getUserid(),
                 details));
       }
-      LOGGER.debug("Method createWorkbasket() created Workbasket '{}'", workbasket);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Method createWorkbasket() created Workbasket '{}'", workbasket);
+      }
       return workbasket;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from createWorkbasket(workbasket). Returning result {} ", workbasket);
     }
   }
 
@@ -176,8 +172,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       throws NotAuthorizedException, WorkbasketNotFoundException, ConcurrencyException,
           InvalidWorkbasketException {
 
-    LOGGER.debug("entry to updateWorkbasket(Workbasket = {})", workbasketToUpdate);
-
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     WorkbasketImpl workbasketImplToUpdate = (WorkbasketImpl) workbasketToUpdate;
     validateNameAndType(workbasketToUpdate);
@@ -209,13 +203,14 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                 details));
       }
 
-      LOGGER.debug(
-          "Method updateWorkbasket() updated workbasket '{}'", workbasketImplToUpdate.getId());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Method updateWorkbasket() updated workbasket '{}'", workbasketImplToUpdate.getId());
+      }
 
       return workbasketImplToUpdate;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from updateWorkbasket(). Returning result {} ", workbasketImplToUpdate);
     }
   }
 
@@ -235,8 +230,7 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   public WorkbasketAccessItem createWorkbasketAccessItem(WorkbasketAccessItem workbasketAccessItem)
       throws InvalidArgumentException, NotAuthorizedException, WorkbasketNotFoundException,
           WorkbasketAccessItemAlreadyExistException {
-    LOGGER.debug(
-        "entry to createWorkbasketAccessItemn(workbasketAccessItem = {})", workbasketAccessItem);
+
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     WorkbasketAccessItemImpl accessItem = (WorkbasketAccessItemImpl) workbasketAccessItem;
     try {
@@ -276,11 +270,15 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                   taskanaEngine.getEngine().getCurrentUserContext().getUserid(),
                   details));
         }
-        LOGGER.debug(
-            "Method createWorkbasketAccessItem() created workbaskteAccessItem {}", accessItem);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "Method createWorkbasketAccessItem() created workbaskteAccessItem {}", accessItem);
+        }
       } catch (PersistenceException e) {
-        LOGGER.debug(
-            "when trying to insert WorkbasketAccessItem {} caught exception", accessItem, e);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "when trying to insert WorkbasketAccessItem {} caught exception", accessItem, e);
+        }
         Stream<String> accessItemExistsIdentifier =
             Stream.of(
                 "SQLCODE=-803", // DB2
@@ -295,17 +293,13 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return accessItem;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug(
-          "exit from createWorkbasketAccessItem(workbasketAccessItem). Returning result {}",
-          accessItem);
     }
   }
 
   @Override
   public WorkbasketAccessItem updateWorkbasketAccessItem(WorkbasketAccessItem workbasketAccessItem)
       throws InvalidArgumentException, NotAuthorizedException {
-    LOGGER.debug(
-        "entry to updateWorkbasketAccessItem(workbasketAccessItem = {}", workbasketAccessItem);
+
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     WorkbasketAccessItemImpl accessItem = (WorkbasketAccessItemImpl) workbasketAccessItem;
     try {
@@ -337,19 +331,18 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                 details));
       }
 
-      LOGGER.debug(
-          "Method updateWorkbasketAccessItem() updated workbasketAccessItem {}", accessItem);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Method updateWorkbasketAccessItem() updated workbasketAccessItem {}", accessItem);
+      }
       return accessItem;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug(
-          "exit from updateWorkbasketAccessItem(workbasketAccessItem). Returning {}", accessItem);
     }
   }
 
   @Override
   public void deleteWorkbasketAccessItem(String accessItemId) throws NotAuthorizedException {
-    LOGGER.debug("entry to deleteWorkbasketAccessItem(id = {})", accessItemId);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -376,12 +369,13 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                 details));
       }
 
-      LOGGER.debug(
-          "Method deleteWorkbasketAccessItem() deleted workbasketAccessItem wit Id {}",
-          accessItemId);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Method deleteWorkbasketAccessItem() deleted workbasketAccessItem wit Id {}",
+            accessItemId);
+      }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteWorkbasketAccessItem(id).");
     }
   }
 
@@ -431,7 +425,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from checkAuthorization(). User is authorized = {}.", isAuthorized);
     }
   }
 
@@ -486,14 +479,12 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from checkAuthorization(). User is authorized = {}.", isAuthorized);
     }
   }
 
   @Override
   public List<WorkbasketAccessItem> getWorkbasketAccessItems(String workbasketId)
       throws NotAuthorizedException {
-    LOGGER.debug("entry to getWorkbasketAccessItems(workbasketId = {})", workbasketId);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     List<WorkbasketAccessItem> result = new ArrayList<>();
     try {
@@ -504,12 +495,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug(
-            "exit from getWorkbasketAccessItems(workbasketId). Returning {} resulting Objects: {} ",
-            result.size(),
-            result);
-      }
     }
   }
 
@@ -518,7 +503,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       String workbasketId, List<WorkbasketAccessItem> wbAccessItems)
       throws NotAuthorizedException, WorkbasketAccessItemAlreadyExistException,
           InvalidArgumentException {
-    LOGGER.debug("entry to setWorkbasketAccessItems(workbasketAccessItems = {})", wbAccessItems);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
 
     Set<String> ids = new HashSet<>();
@@ -554,7 +538,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from setWorkbasketAccessItems(workbasketAccessItems = {})", wbAccessItems);
     }
   }
 
@@ -588,7 +571,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   @Override
   public List<WorkbasketSummary> getDistributionTargets(String workbasketId)
       throws NotAuthorizedException, WorkbasketNotFoundException {
-    LOGGER.debug("entry to getDistributionTargets(workbasketId = {})", workbasketId);
     List<WorkbasketSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -605,21 +587,13 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = result.size();
-        LOGGER.debug(
-            "exit from getDistributionTargets(workbasketId). Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            result);
-      }
     }
   }
 
   @Override
   public List<WorkbasketSummary> getDistributionTargets(String workbasketKey, String domain)
       throws NotAuthorizedException, WorkbasketNotFoundException {
-    LOGGER.debug(
-        "entry to getDistributionTargets(workbasketKey = {}, domain = {})", workbasketKey, domain);
+
     List<WorkbasketSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -636,25 +610,13 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = result.size();
-        LOGGER.debug(
-            "exit from getDistributionTargets(workbasketId). Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            result);
-      }
     }
   }
 
   @Override
   public void setDistributionTargets(String sourceWorkbasketId, List<String> targetWorkbasketIds)
       throws WorkbasketNotFoundException, NotAuthorizedException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "entry to setDistributionTargets(sourceWorkbasketId = {}, targetWorkazketIds = {})",
-          sourceWorkbasketId,
-          targetWorkbasketIds);
-    }
+
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -677,11 +639,13 @@ public class WorkbasketServiceImpl implements WorkbasketService {
           // check for existence of target workbasket
           getWorkbasket(targetId);
           distributionTargetMapper.insert(sourceWorkbasketId, targetId);
-          LOGGER.debug(
-              "Method setDistributionTargets() created distribution target "
-                  + "for source '{}' and target {}",
-              sourceWorkbasketId,
-              targetId);
+          if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug(
+                "Method setDistributionTargets() created distribution target "
+                    + "for source '{}' and target {}",
+                sourceWorkbasketId,
+                targetId);
+          }
         }
 
         if (HistoryEventManager.isHistoryEnabled() && !targetWorkbasketIds.isEmpty()) {
@@ -713,10 +677,7 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   @Override
   public void addDistributionTarget(String sourceWorkbasketId, String targetWorkbasketId)
       throws NotAuthorizedException, WorkbasketNotFoundException {
-    LOGGER.debug(
-        "entry to addDistributionTarget(sourceWorkbasketId = {}, targetWorkbasketId = {})",
-        sourceWorkbasketId,
-        targetWorkbasketId);
+
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -729,9 +690,11 @@ public class WorkbasketServiceImpl implements WorkbasketService {
           distributionTargetMapper.getNumberOfDistributionTargets(
               sourceWorkbasketId, targetWorkbasketId);
       if (numOfDistTargets > 0) {
-        LOGGER.debug(
-            "addDistributionTarget detected that the specified "
-                + "distribution target exists already. Doing nothing.");
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "addDistributionTarget detected that the specified "
+                  + "distribution target exists already. Doing nothing.");
+        }
       } else {
         distributionTargetMapper.insert(sourceWorkbasketId, targetWorkbasketId);
 
@@ -747,27 +710,25 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                   taskanaEngine.getEngine().getCurrentUserContext().getUserid(),
                   details));
         }
-        LOGGER.debug(
-            "addDistributionTarget inserted distribution target sourceId = {}, targetId = {}",
-            sourceWorkbasketId,
-            targetWorkbasketId);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "addDistributionTarget inserted distribution target sourceId = {}, targetId = {}",
+              sourceWorkbasketId,
+              targetWorkbasketId);
+        }
         sourceWorkbasket.setModified(Instant.now());
         workbasketMapper.update(sourceWorkbasket);
       }
 
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from addDistributionTarget");
     }
   }
 
   @Override
   public void removeDistributionTarget(String sourceWorkbasketId, String targetWorkbasketId)
       throws NotAuthorizedException {
-    LOGGER.debug(
-        "entry to removeDistributionTarget(sourceWorkbasketId = {}, targetWorkbasketId = {})",
-        sourceWorkbasketId,
-        targetWorkbasketId);
+
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -797,30 +758,35 @@ public class WorkbasketServiceImpl implements WorkbasketService {
                     details));
           }
         }
-        LOGGER.debug(
-            "removeDistributionTarget deleted distribution target sourceId = {}, targetId = {}",
-            sourceWorkbasketId,
-            targetWorkbasketId);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "removeDistributionTarget deleted distribution target sourceId = {}, targetId = {}",
+              sourceWorkbasketId,
+              targetWorkbasketId);
+        }
 
         try {
           WorkbasketImpl sourceWorkbasket = (WorkbasketImpl) getWorkbasket(sourceWorkbasketId);
           sourceWorkbasket.setModified(Instant.now());
           workbasketMapper.update(sourceWorkbasket);
         } catch (WorkbasketNotFoundException e) {
-          LOGGER.debug(
-              "removeDistributionTarget found that the source workbasket {} "
-                  + "doesn't exist. Ignoring the request... ",
-              sourceWorkbasketId);
+          if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug(
+                "removeDistributionTarget found that the source workbasket {} "
+                    + "doesn't exist. Ignoring the request... ",
+                sourceWorkbasketId);
+          }
         }
 
       } else {
-        LOGGER.debug(
-            "removeDistributionTarget detected that the specified distribution "
-                + "target doesn't exist. Doing nothing...");
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug(
+              "removeDistributionTarget detected that the specified distribution "
+                  + "target doesn't exist. Doing nothing...");
+        }
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from addDistributionTarget");
     }
   }
 
@@ -828,7 +794,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   public boolean deleteWorkbasket(String workbasketId)
       throws NotAuthorizedException, WorkbasketNotFoundException, WorkbasketInUseException,
           InvalidArgumentException {
-    LOGGER.debug("entry to deleteWorkbasket(workbasketId = {})", workbasketId);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
 
     validateId(workbasketId);
@@ -840,7 +805,9 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       try {
         workbasketToDelete = this.getWorkbasket(workbasketId);
       } catch (WorkbasketNotFoundException ex) {
-        LOGGER.debug("Workbasket with workbasketId = {} is already deleted?", workbasketId);
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("Workbasket with workbasketId = {} is already deleted?", workbasketId);
+        }
         throw ex;
       }
 
@@ -886,15 +853,11 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return canBeDeletedNow;
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteWorkbasket(workbasketId = {})", workbasketId);
     }
   }
 
   public BulkOperationResults<String, TaskanaException> deleteWorkbaskets(
       List<String> workbasketsIds) throws NotAuthorizedException, InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("entry to deleteWorkbaskets(workbasketId = {})", workbasketsIds);
-    }
 
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
 
@@ -936,7 +899,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       }
       return bulkLog;
     } finally {
-      LOGGER.debug("exit from deleteWorkbaskets()");
       taskanaEngine.returnConnection();
     }
   }
@@ -944,7 +906,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
   @Override
   public List<WorkbasketSummary> getDistributionSources(String workbasketId)
       throws NotAuthorizedException, WorkbasketNotFoundException {
-    LOGGER.debug("entry to getDistributionSources(workbasketId = {})", workbasketId);
     List<WorkbasketSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -959,21 +920,13 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = result.size();
-        LOGGER.debug(
-            "exit from getDistributionSources(workbasketId). Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            result);
-      }
     }
   }
 
   @Override
   public List<WorkbasketSummary> getDistributionSources(String workbasketKey, String domain)
       throws NotAuthorizedException, WorkbasketNotFoundException {
-    LOGGER.debug(
-        "entry to getDistributionSources(workbasketKey = {}, domain = {})", workbasketKey, domain);
+
     List<WorkbasketSummary> result = new ArrayList<>();
     try {
       taskanaEngine.openConnection();
@@ -988,20 +941,12 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       return result;
     } finally {
       taskanaEngine.returnConnection();
-      if (LOGGER.isDebugEnabled()) {
-        int numberOfResultObjects = result.size();
-        LOGGER.debug(
-            "exit from getDistributionSources(workbasketId). Returning {} resulting Objects: {} ",
-            numberOfResultObjects,
-            result);
-      }
     }
   }
 
   @Override
   public void deleteWorkbasketAccessItemsForAccessId(String accessId)
       throws NotAuthorizedException {
-    LOGGER.debug("entry to deleteWorkbasketAccessItemsForAccessId(accessId = {})", accessId);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -1035,7 +980,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from deleteWorkbasketAccessItemsForAccessId(accessId={}).", accessId);
     }
   }
 
@@ -1119,18 +1063,24 @@ public class WorkbasketServiceImpl implements WorkbasketService {
 
     // Skip permission check if security is not enabled
     if (!taskanaEngine.getEngine().getConfiguration().isSecurityEnabled()) {
-      LOGGER.debug("Skipping permissions check since security is disabled.");
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Skipping permissions check since security is disabled.");
+      }
       return true;
     }
 
     if (Arrays.asList(requestedPermissions).contains(WorkbasketPermission.READ)) {
 
       if (taskanaEngine.getEngine().isUserInRole(TaskanaRole.ADMIN)) {
-        LOGGER.debug("Skipping read permissions check since user is in role ADMIN");
+        if (LOGGER.isDebugEnabled()) {
+          LOGGER.debug("Skipping read permissions check since user is in role ADMIN");
+        }
         return true;
       }
     } else if (taskanaEngine.getEngine().isUserInRole(TaskanaRole.ADMIN, TaskanaRole.TASK_ADMIN)) {
-      LOGGER.debug("Skipping permissions check since user is in role ADMIN or TASK_ADMIN.");
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Skipping permissions check since user is in role ADMIN or TASK_ADMIN.");
+      }
       return true;
     }
 
@@ -1195,7 +1145,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
 
   private void markWorkbasketForDeletion(String workbasketId)
       throws NotAuthorizedException, InvalidArgumentException {
-    LOGGER.debug("entry to markWorkbasketForDeletion(workbasketId = {})", workbasketId);
     taskanaEngine.getEngine().checkRoleMembership(TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
     try {
       taskanaEngine.openConnection();
@@ -1214,7 +1163,6 @@ public class WorkbasketServiceImpl implements WorkbasketService {
       }
     } finally {
       taskanaEngine.returnConnection();
-      LOGGER.debug("exit from markWorkbasketForDeletion(workbasketId = {}).", workbasketId);
     }
   }
 

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/jobs/WorkbasketCleanupJob.java

@@ -105,8 +105,10 @@ public class WorkbasketCleanupJob extends AbstractTaskanaJob {
 
     BulkOperationResults<String, TaskanaException> results =
         taskanaEngineImpl.getWorkbasketService().deleteWorkbaskets(workbasketsToBeDeleted);
-    LOGGER.debug(
-        "{} workbasket deleted.", workbasketsToBeDeleted.size() - results.getFailedIds().size());
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "{} workbasket deleted.", workbasketsToBeDeleted.size() - results.getFailedIds().size());
+    }
     for (String failedId : results.getFailedIds()) {
       LOGGER.warn(
           "Workbasket with id {} could not be deleted. Reason:",
@@ -117,11 +119,9 @@ public class WorkbasketCleanupJob extends AbstractTaskanaJob {
   }
 
   private void scheduleNextCleanupJob() {
-    LOGGER.debug("Entry to scheduleNextCleanupJob.");
     ScheduledJob job = new ScheduledJob();
     job.setType(ScheduledJob.Type.WORKBASKETCLEANUPJOB);
     job.setDue(getNextDueForCleanupJob());
     taskanaEngineImpl.getJobService().createJob(job);
-    LOGGER.debug("Exit from scheduleNextCleanupJob.");
   }
 }

lib/taskana-core/src/test/java/acceptance/ArchitectureTest.java

@@ -9,6 +9,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import com.tngtech.archunit.base.Optional;
 import com.tngtech.archunit.core.domain.JavaClass;
+import com.tngtech.archunit.core.domain.JavaClass.Predicates;
 import com.tngtech.archunit.core.domain.JavaClasses;
 import com.tngtech.archunit.core.domain.JavaMethod;
 import com.tngtech.archunit.core.importer.ClassFileImporter;
@@ -33,6 +34,8 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestFactory;
 import org.junit.jupiter.api.function.ThrowingConsumer;
 
+import pro.taskana.common.internal.logging.LoggingAspect;
+
 /**
  * Test architecture of classes in taskana. For more info and examples see
  * https://www.archunit.org/userguide/html/000_Index.html.
@@ -75,8 +78,9 @@ class ArchitectureTest {
             .and()
             .resideInAPackage("..api..")
             .should()
-            .onlyDependOnClassesThat()
-            .resideOutsideOfPackage("..internal..");
+            .onlyDependOnClassesThat(
+                Predicates.resideOutsideOfPackage("..pro.taskana..internal..")
+                    .or(Predicates.assignableTo(LoggingAspect.class)));
     myRule.check(importedClasses);
   }
 

lib/taskana-core/src/test/java/acceptance/PojoTest.java

@@ -19,7 +19,6 @@ import java.util.stream.Collectors;
 import java.util.stream.Stream;
 import nl.jqno.equalsverifier.EqualsVerifier;
 import nl.jqno.equalsverifier.Warning;
-import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.DynamicTest;
 import org.junit.jupiter.api.Test;
@@ -28,21 +27,16 @@ import org.junit.jupiter.api.TestFactory;
 /** check classes with a custom equals and hashcode implementation for correctness. */
 class PojoTest {
 
-  private static List<Class<?>> pojoClasses;
-
-  @BeforeAll
-  static void setup() {
-    pojoClasses = getPojoClasses();
-  }
+  private static final List<Class<?>> POJO_CLASSES = getPojoClasses();
 
   @Test
   void testsThatPojoClassesAreFound() {
-    assertThat(pojoClasses).isNotEmpty();
+    assertThat(POJO_CLASSES).isNotEmpty();
   }
 
   @TestFactory
   Stream<DynamicTest> equalsContract() {
-    return pojoClasses.stream()
+    return POJO_CLASSES.stream()
         .map(
             cl ->
                 DynamicTest.dynamicTest(
@@ -52,7 +46,7 @@ class PojoTest {
 
   @TestFactory
   Stream<DynamicTest> validateGetters() {
-    return pojoClasses.stream()
+    return POJO_CLASSES.stream()
         .map(
             cl ->
                 DynamicTest.dynamicTest(
@@ -62,7 +56,7 @@ class PojoTest {
 
   @TestFactory
   Stream<DynamicTest> validateSetters() {
-    return pojoClasses.stream()
+    return POJO_CLASSES.stream()
         .map(
             cl ->
                 DynamicTest.dynamicTest(
@@ -73,7 +67,7 @@ class PojoTest {
   @TestFactory
   @Disabled("because of the truncation of all Instant member variables")
   Stream<DynamicTest> validateGetAndSet() {
-    return pojoClasses.stream()
+    return POJO_CLASSES.stream()
         .map(
             cl ->
                 DynamicTest.dynamicTest(
@@ -83,7 +77,7 @@ class PojoTest {
 
   @TestFactory
   Stream<DynamicTest> validateNoStaticExceptFinalFields() {
-    return pojoClasses.stream()
+    return POJO_CLASSES.stream()
         .map(
             cl ->
                 DynamicTest.dynamicTest(
@@ -93,7 +87,7 @@ class PojoTest {
 
   @TestFactory
   Stream<DynamicTest> validateNoPublicFields() {
-    return pojoClasses.stream()
+    return POJO_CLASSES.stream()
         .map(
             cl ->
                 DynamicTest.dynamicTest(

lib/taskana-core/src/test/java/acceptance/task/SelectAndClaimTaskAccTest.java

@@ -41,7 +41,7 @@ class SelectAndClaimTaskAccTest extends AbstractAccTest {
 
     Runnable test = getRunnableTest(selectedAndClaimedTasks, accessIds);
 
-    Thread[] threads = new Thread[4];
+    Thread[] threads = new Thread[accessIds.size()];
     for (int i = 0; i < threads.length; i++) {
       threads[i] = new Thread(test);
       threads[i].start();

lib/taskana-spring-example/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>

lib/taskana-spring/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-core</artifactId>
@@ -72,4 +77,4 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
-</project>
+</project>

pom.xml

@@ -89,6 +89,10 @@
     <version.slf4j-test>1.2.0</version.slf4j-test>
     <version.auto-restdocs>2.0.11</version.auto-restdocs>
 
+    <!-- AspectJ dependencies -->
+    <version.aspectj-maven-plugin>1.12.6</version.aspectj-maven-plugin>
+    <version.aspectj>1.9.6</version.aspectj>
+
     <!-- database driver versions -->
     <version.db2>11.1.1.1</version.db2>
 
@@ -135,6 +139,51 @@
   </dependencyManagement>
 
   <profiles>
+    <profile>
+      <id>aspectj-logging</id>
+      <activation>
+        <property>
+          <name>!skipAspectJ</name>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>com.nickwongdev</groupId>
+            <artifactId>aspectj-maven-plugin</artifactId>
+            <version>${version.aspectj-maven-plugin}</version>
+            <configuration>
+              <complianceLevel>${java.version}</complianceLevel>
+              <source>11</source>
+              <target>8</target>
+              <showWeaveInfo>false</showWeaveInfo>
+              <verbose>true</verbose>
+              <aspectLibraries>
+                <aspectLibrary>
+                  <groupId>pro.taskana</groupId>
+                  <artifactId>taskana-common-logging</artifactId>
+                </aspectLibrary>
+              </aspectLibraries>
+            </configuration>
+            <executions>
+              <execution>
+                <goals>
+                  <goal>compile</goal>
+                  <goal>test-compile</goal>
+                </goals>
+              </execution>
+            </executions>
+            <dependencies>
+              <dependency>
+                <groupId>org.aspectj</groupId>
+                <artifactId>aspectjtools</artifactId>
+                <version>${version.aspectj}</version>
+              </dependency>
+            </dependencies>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
     <profile>
       <id>jdk8-compatibility</id>
       <activation>
@@ -261,6 +310,7 @@
           </execution>
         </executions>
       </plugin>
+
       <!-- This plugin appends version information into the jar, so
           that it can be extracted from the jar. See TSK-837 for more information -->
       <plugin>

rest/taskana-rest-spring-example-boot/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>com.h2database</groupId>
       <artifactId>h2</artifactId>
@@ -41,9 +46,6 @@
   <profiles>
     <profile>
       <id>history.plugin</id>
-      <activation>
-        <activeByDefault>false</activeByDefault>
-      </activation>
       <dependencies>
         <dependency>
           <groupId>pro.taskana.history</groupId>
@@ -84,9 +86,6 @@
     </profile>
     <profile>
       <id>historyLogging.plugin</id>
-      <activation>
-        <activeByDefault>false</activeByDefault>
-      </activation>
       <dependencies>
         <dependency>
           <groupId>pro.taskana.history</groupId>

rest/taskana-rest-spring-example-common/pom.xml

@@ -20,6 +20,11 @@
   </properties>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-rest-spring</artifactId>
@@ -112,4 +117,4 @@
     </dependency>
   </dependencies>
 
-</project>
+</project>

rest/taskana-rest-spring-example-common/src/main/java/pro/taskana/example/jobs/JobScheduler.java

@@ -42,7 +42,6 @@ public class JobScheduler {
   public void scheduleCleanupJob()
       throws NoSuchMethodException, InvocationTargetException, IllegalAccessException,
           ClassNotFoundException {
-    LOGGER.debug("Entry to scheduleCleanupJob.");
     TaskCleanupJob.initializeSchedule(taskanaEngine);
     WorkbasketCleanupJob.initializeSchedule(taskanaEngine);
 
@@ -53,7 +52,6 @@ public class JobScheduler {
           .getDeclaredMethod("initializeSchedule", TaskanaEngine.class)
           .invoke(null, taskanaEngine);
     }
-    LOGGER.debug("Exit from scheduleCleanupJob.");
   }
 
   @Scheduled(cron = "${taskana.jobscheduler.async.cron}")

rest/taskana-rest-spring-example-common/src/main/java/pro/taskana/example/rest/controllers/LoginController.java

@@ -1,7 +1,5 @@
 package pro.taskana.example.rest.controllers;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.core.Ordered;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
@@ -10,13 +8,10 @@ import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 /** The login controller. */
 @Controller
 public class LoginController implements WebMvcConfigurer {
-  private static final Logger LOGGER = LoggerFactory.getLogger(LoginController.class);
 
   @Override
   public void addViewControllers(ViewControllerRegistry registry) {
-    LOGGER.debug("Entry to addViewControllers()");
     registry.addViewController("/login").setViewName("login");
     registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
-    LOGGER.debug("Exit from addViewControllers()");
   }
 }

rest/taskana-rest-spring-example-wildfly/pom.xml

@@ -39,6 +39,11 @@
   </dependencyManagement>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
@@ -294,4 +299,4 @@
       <url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
     </repository>
   </repositories>
-</project>
+</project>

rest/taskana-rest-spring/pom.xml

@@ -15,6 +15,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-spring</artifactId>
@@ -239,4 +244,4 @@
     </plugins>
   </build>
 
-</project>
+</project>

rest/taskana-rest-spring/src/main/java/pro/taskana/classification/rest/ClassificationController.java

@@ -4,8 +4,6 @@ import java.beans.ConstructorProperties;
 import java.util.List;
 import java.util.function.BiConsumer;
 import javax.servlet.http.HttpServletRequest;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.MediaTypes;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
@@ -48,8 +46,6 @@ import pro.taskana.common.rest.util.QueryParamsValidator;
 @EnableHypermediaSupport(type = HypermediaType.HAL)
 public class ClassificationController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(ClassificationController.class);
-
   private final ClassificationService classificationService;
   private final ClassificationRepresentationModelAssembler modelAssembler;
   private final ClassificationSummaryRepresentationModelAssembler summaryModelAssembler;
@@ -97,10 +93,6 @@ public class ClassificationController {
         ResponseEntity.ok(
             summaryModelAssembler.toPagedModel(
                 classificationSummaries, pagingParameter.getPageMetadata()));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getClassifications(), returning {}", response);
-    }
-
     return response;
   }
 
@@ -116,17 +108,9 @@ public class ClassificationController {
   @Transactional(readOnly = true, rollbackFor = Exception.class)
   public ResponseEntity<ClassificationRepresentationModel> getClassification(
       @PathVariable String classificationId) throws ClassificationNotFoundException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to getClassification(classificationId= {})", classificationId);
-    }
-
     Classification classification = classificationService.getClassification(classificationId);
     ResponseEntity<ClassificationRepresentationModel> response =
         ResponseEntity.ok(modelAssembler.toModel(classification));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getClassification(), returning {}", response);
-    }
-
     return response;
   }
 
@@ -149,17 +133,11 @@ public class ClassificationController {
       @RequestBody ClassificationRepresentationModel repModel)
       throws NotAuthorizedException, ClassificationAlreadyExistException, DomainNotFoundException,
           InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to createClassification(repModel= {})", repModel);
-    }
     Classification classification = modelAssembler.toEntityModel(repModel);
     classification = classificationService.createClassification(classification);
 
     ResponseEntity<ClassificationRepresentationModel> response =
         ResponseEntity.status(HttpStatus.CREATED).body(modelAssembler.toModel(classification));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from createClassification(), returning {}", response);
-    }
 
     return response;
   }
@@ -184,12 +162,6 @@ public class ClassificationController {
       @RequestBody ClassificationRepresentationModel resource)
       throws NotAuthorizedException, ClassificationNotFoundException, ConcurrencyException,
           InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "Entry to updateClassification(classificationId= {}, resource= {})",
-          classificationId,
-          resource);
-    }
     if (!classificationId.equals(resource.getClassificationId())) {
       throw new InvalidArgumentException(
           String.format(
@@ -202,10 +174,6 @@ public class ClassificationController {
     ResponseEntity<ClassificationRepresentationModel> result =
         ResponseEntity.ok(modelAssembler.toModel(classification));
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from updateClassification(), returning {}", result);
-    }
-
     return result;
   }
 
@@ -225,10 +193,8 @@ public class ClassificationController {
   public ResponseEntity<ClassificationRepresentationModel> deleteClassification(
       @PathVariable String classificationId)
       throws ClassificationNotFoundException, ClassificationInUseException, NotAuthorizedException {
-    LOGGER.debug("Entry to deleteClassification(classificationId= {})", classificationId);
     classificationService.deleteClassification(classificationId);
     ResponseEntity<ClassificationRepresentationModel> response = ResponseEntity.noContent().build();
-    LOGGER.debug("Exit from deleteClassification(), returning {}", response);
     return response;
   }
 

rest/taskana-rest-spring/src/main/java/pro/taskana/classification/rest/ClassificationDefinitionController.java

@@ -5,7 +5,6 @@ import static pro.taskana.common.internal.util.CheckedFunction.wrap;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -13,8 +12,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.DuplicateKeyException;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
@@ -48,9 +45,6 @@ import pro.taskana.common.rest.RestEndpoints;
 @EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
 public class ClassificationDefinitionController {
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(ClassificationDefinitionController.class);
-
   private final ObjectMapper mapper;
   private final ClassificationService classificationService;
   private final ClassificationDefinitionRepresentationModelAssembler assembler;
@@ -76,9 +70,6 @@ public class ClassificationDefinitionController {
   @Transactional(readOnly = true, rollbackFor = Exception.class)
   public ResponseEntity<ClassificationDefinitionCollectionRepresentationModel>
       exportClassifications(@RequestParam(required = false) String[] domain) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to exportClassifications(domain= {})", Arrays.toString(domain));
-    }
     ClassificationQuery query = classificationService.createClassificationQuery();
 
     List<ClassificationSummary> summaries =
@@ -94,9 +85,6 @@ public class ClassificationDefinitionController {
 
     ResponseEntity<ClassificationDefinitionCollectionRepresentationModel> response =
         ResponseEntity.ok(collectionModel);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from exportClassifications(), returning {}", response);
-    }
 
     return response;
   }
@@ -122,7 +110,6 @@ public class ClassificationDefinitionController {
       throws InvalidArgumentException, NotAuthorizedException, ConcurrencyException,
           ClassificationNotFoundException, ClassificationAlreadyExistException,
           DomainNotFoundException, IOException {
-    LOGGER.debug("Entry to importClassifications()");
     Map<String, String> systemIds = getSystemIds();
     ClassificationDefinitionCollectionRepresentationModel collection =
         extractClassificationResourcesFromFile(file);
@@ -133,7 +120,6 @@ public class ClassificationDefinitionController {
     insertOrUpdateClassificationsWithoutParent(collection.getContent(), systemIds);
     updateParentChildrenRelations(childrenInFile);
     ResponseEntity<Void> response = ResponseEntity.noContent().build();
-    LOGGER.debug("Exit from importClassifications(), returning {}", response);
     return response;
   }
 
@@ -171,7 +157,6 @@ public class ClassificationDefinitionController {
   private Map<Classification, String> mapChildrenToParentKeys(
       Collection<ClassificationDefinitionRepresentationModel> definitionList,
       Map<String, String> systemIds) {
-    LOGGER.debug("Entry to mapChildrenToParentKeys()");
     Map<Classification, String> childrenInFile = new HashMap<>();
     Set<String> newKeysWithDomain = new HashSet<>();
     definitionList.stream()
@@ -200,10 +185,6 @@ public class ClassificationDefinitionController {
         childrenInFile.put(assembler.toEntityModel(def), cl.getParentKey());
       }
     }
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from mapChildrenToParentKeys(), returning {}", childrenInFile);
-    }
-
     return childrenInFile;
   }
 
@@ -212,8 +193,6 @@ public class ClassificationDefinitionController {
       Map<String, String> systemIds)
       throws ClassificationNotFoundException, NotAuthorizedException, InvalidArgumentException,
           ClassificationAlreadyExistException, DomainNotFoundException, ConcurrencyException {
-    LOGGER.debug("Entry to insertOrUpdateClassificationsWithoutParent()");
-
     for (ClassificationDefinitionRepresentationModel definition : definitionList) {
       ClassificationRepresentationModel classificationRepModel = definition.getClassification();
       classificationRepModel.setParentKey(null);
@@ -230,14 +209,11 @@ public class ClassificationDefinitionController {
         classificationService.createClassification(newClassification);
       }
     }
-    LOGGER.debug("Exit from insertOrUpdateClassificationsWithoutParent()");
   }
 
   private void updateParentChildrenRelations(Map<Classification, String> childrenInFile)
       throws ClassificationNotFoundException, NotAuthorizedException, ConcurrencyException,
           InvalidArgumentException {
-    LOGGER.debug("Entry to updateParentChildrenRelations()");
-
     for (Map.Entry<Classification, String> entry : childrenInFile.entrySet()) {
       Classification childRes = entry.getKey();
       String parentKey = entry.getValue();
@@ -256,13 +232,11 @@ public class ClassificationDefinitionController {
 
       classificationService.updateClassification(child);
     }
-    LOGGER.debug("Exit from updateParentChildrenRelations()");
   }
 
   private void updateExistingClassification(Classification newClassification, String systemId)
       throws ClassificationNotFoundException, NotAuthorizedException, ConcurrencyException,
           InvalidArgumentException {
-    LOGGER.debug("Entry to updateExistingClassification()");
     Classification currentClassification = classificationService.getClassification(systemId);
     if (newClassification.getType() != null
         && !newClassification.getType().equals(currentClassification.getType())) {
@@ -302,6 +276,5 @@ public class ClassificationDefinitionController {
         ClassificationCustomField.CUSTOM_8,
         newClassification.getCustomAttribute(ClassificationCustomField.CUSTOM_8));
     classificationService.updateClassification(currentClassification);
-    LOGGER.debug("Exit from updateExistingClassification()");
   }
 }

rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/AccessIdController.java

@@ -1,8 +1,6 @@
 package pro.taskana.common.rest;
 
 import java.util.List;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
 import org.springframework.hateoas.config.EnableHypermediaSupport.HypermediaType;
@@ -23,8 +21,6 @@ import pro.taskana.common.rest.models.AccessIdRepresentationModel;
 @EnableHypermediaSupport(type = HypermediaType.HAL)
 public class AccessIdController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(AccessIdController.class);
-
   private final LdapClient ldapClient;
   private final TaskanaEngine taskanaEngine;
 
@@ -48,18 +44,10 @@ public class AccessIdController {
   public ResponseEntity<List<AccessIdRepresentationModel>> searchUsersAndGroups(
       @RequestParam("search-for") String searchFor)
       throws InvalidArgumentException, NotAuthorizedException {
-
-    LOGGER.debug("Entry to validateAccessIds(search-for= {})", searchFor);
-
     taskanaEngine.checkRoleMembership(TaskanaRole.ADMIN, TaskanaRole.BUSINESS_ADMIN);
 
     List<AccessIdRepresentationModel> accessIdUsers = ldapClient.searchUsersAndGroups(searchFor);
-    ResponseEntity<List<AccessIdRepresentationModel>> response = ResponseEntity.ok(accessIdUsers);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from validateAccessIds(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(accessIdUsers);
   }
 
   /**
@@ -81,30 +69,17 @@ public class AccessIdController {
   public ResponseEntity<List<AccessIdRepresentationModel>> searchUsersByNameOrAccessIdForRole(
       @RequestParam("search-for") String nameOrAccessId, @RequestParam("role") String role)
       throws InvalidArgumentException, NotAuthorizedException {
-
-    LOGGER.debug(
-        "Entry to searchUsersByNameOrAccessIdForRole(search-for= {}, role= {})",
-        nameOrAccessId,
-        role);
-
     taskanaEngine.checkRoleMembership(
         TaskanaRole.USER, TaskanaRole.BUSINESS_ADMIN, TaskanaRole.ADMIN);
 
-    if (role.equals("user")) {
-      List<AccessIdRepresentationModel> accessIdUsers =
-          ldapClient.searchUsersByNameOrAccessIdInUserRole(nameOrAccessId);
-      ResponseEntity<List<AccessIdRepresentationModel>> response = ResponseEntity.ok(accessIdUsers);
-
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug("Exit from searchUsersByNameOrAccessIdForRole(), returning {}", response);
-      }
-
-      return response;
-    } else {
+    if (!role.equals("user")) {
       throw new InvalidArgumentException(
           String.format(
               "Requested users for not supported role %s.  Only role 'user' is supported'", role));
     }
+    List<AccessIdRepresentationModel> accessIdUsers =
+        ldapClient.searchUsersByNameOrAccessIdInUserRole(nameOrAccessId);
+    return ResponseEntity.ok(accessIdUsers);
   }
 
   /**
@@ -120,9 +95,6 @@ public class AccessIdController {
   public ResponseEntity<List<AccessIdRepresentationModel>> getGroupsByAccessId(
       @RequestParam("access-id") String accessId)
       throws InvalidArgumentException, NotAuthorizedException {
-
-    LOGGER.debug("Entry to getGroupsByAccessId(access-id= {})", accessId);
-
     taskanaEngine.checkRoleMembership(TaskanaRole.ADMIN, TaskanaRole.BUSINESS_ADMIN);
 
     if (!ldapClient.validateAccessId(accessId)) {
@@ -131,11 +103,7 @@ public class AccessIdController {
 
     List<AccessIdRepresentationModel> accessIds =
         ldapClient.searchGroupsAccessIdIsMemberOf(accessId);
-    ResponseEntity<List<AccessIdRepresentationModel>> response = ResponseEntity.ok(accessIds);
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getGroupsByAccessId(), returning {}", response);
-    }
-    return response;
+    return ResponseEntity.ok(accessIds);
   }
 }

rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/SpringSecurityToJaasFilter.java

@@ -29,7 +29,9 @@ public class SpringSecurityToJaasFilter extends GenericFilterBean {
       throws IOException, ServletException {
     Optional<Authentication> authentication = getCurrentAuthentication();
     if (authentication.isPresent()) {
-      LOGGER.debug("Authentication found in Spring security context: {}", authentication);
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Authentication found in Spring security context: {}", authentication);
+      }
       obtainSubject()
           .ifPresent(
               subject -> {
@@ -37,8 +39,10 @@ public class SpringSecurityToJaasFilter extends GenericFilterBean {
                 initializeGroupPrincipalsFromAuthentication(authentication.get(), subject);
               });
     } else {
-      LOGGER.debug(
-          "No authentication found in Spring security context. Continuing unauthenticatic.");
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "No authentication found in Spring security context. Continuing unauthenticatic.");
+      }
     }
 
     chain.doFilter(request, response);
@@ -74,12 +78,17 @@ public class SpringSecurityToJaasFilter extends GenericFilterBean {
   private void initializeUserPrincipalFromAuthentication(
       Authentication authentication, Subject subject) {
     if (subject.getPrincipals().isEmpty()) {
-      LOGGER.debug("Setting the principal of the subject with {}.", authentication.getPrincipal());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Setting the principal of the subject with {}.", authentication.getPrincipal());
+      }
       subject
           .getPrincipals()
           .add(new UserPrincipal(((UserDetails) authentication.getPrincipal()).getUsername()));
     } else {
-      LOGGER.debug("Principal of the subject is already set to {}.", subject.getPrincipals());
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Principal of the subject is already set to {}.", subject.getPrincipals());
+      }
       throw new SystemException("Finding an existing principal is unexpected. Please investigate.");
     }
   }
@@ -87,7 +96,9 @@ public class SpringSecurityToJaasFilter extends GenericFilterBean {
   private void initializeGroupPrincipalsFromAuthentication(
       Authentication authentication, Subject subject) {
 
-    LOGGER.debug("Adding roles {} to subject.", authentication.getAuthorities());
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Adding roles {} to subject.", authentication.getAuthorities());
+    }
 
     authentication
         .getAuthorities()
@@ -95,6 +106,8 @@ public class SpringSecurityToJaasFilter extends GenericFilterBean {
             grantedAuthority ->
                 subject.getPrincipals().add(new GroupPrincipal(grantedAuthority.getAuthority())));
 
-    LOGGER.debug("{}", subject.getPublicCredentials(GroupPrincipal.class));
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("{}", subject.getPublicCredentials(GroupPrincipal.class));
+    }
   }
 }

rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/TaskanaEngineController.java

@@ -2,8 +2,6 @@ package pro.taskana.common.rest;
 
 import java.util.List;
 import java.util.Map;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -21,8 +19,6 @@ import pro.taskana.common.rest.models.VersionRepresentationModel;
 @EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
 public class TaskanaEngineController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TaskanaEngineController.class);
-
   private final TaskanaEngineConfiguration taskanaEngineConfiguration;
 
   private final TaskanaEngine taskanaEngine;
@@ -40,12 +36,7 @@ public class TaskanaEngineController {
    */
   @GetMapping(path = RestEndpoints.URL_DOMAIN)
   public ResponseEntity<List<String>> getDomains() {
-    ResponseEntity<List<String>> response =
-        ResponseEntity.ok(taskanaEngineConfiguration.getDomains());
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getDomains(), returning {}", response);
-    }
-    return response;
+    return ResponseEntity.ok(taskanaEngineConfiguration.getDomains());
   }
 
   /**
@@ -59,21 +50,11 @@ public class TaskanaEngineController {
   @GetMapping(path = RestEndpoints.URL_CLASSIFICATION_CATEGORIES)
   public ResponseEntity<List<String>> getClassificationCategories(
       @RequestParam(required = false) String type) {
-    LOGGER.debug("Entry to getClassificationCategories(type = {})", type);
     ResponseEntity<List<String>> response;
     if (type != null) {
-      response =
-          ResponseEntity.ok(taskanaEngineConfiguration.getClassificationCategoriesByType(type));
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug("Exit from getClassificationCategories(), returning {}", response);
-      }
-      return response;
+      return ResponseEntity.ok(taskanaEngineConfiguration.getClassificationCategoriesByType(type));
     }
-    response = ResponseEntity.ok(taskanaEngineConfiguration.getAllClassificationCategories());
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getClassificationCategories(), returning {}", response);
-    }
-    return response;
+    return ResponseEntity.ok(taskanaEngineConfiguration.getAllClassificationCategories());
   }
 
   /**
@@ -83,12 +64,7 @@ public class TaskanaEngineController {
    */
   @GetMapping(path = RestEndpoints.URL_CLASSIFICATION_TYPES)
   public ResponseEntity<List<String>> getClassificationTypes() {
-    ResponseEntity<List<String>> response =
-        ResponseEntity.ok(taskanaEngineConfiguration.getClassificationTypes());
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getClassificationTypes(), returning {}", response);
-    }
-    return response;
+    return ResponseEntity.ok(taskanaEngineConfiguration.getClassificationTypes());
   }
 
   /**
@@ -99,12 +75,7 @@ public class TaskanaEngineController {
    */
   @GetMapping(path = RestEndpoints.URL_CLASSIFICATION_CATEGORIES_BY_TYPES)
   public ResponseEntity<Map<String, List<String>>> getClassificationCategoriesByTypeMap() {
-    ResponseEntity<Map<String, List<String>>> response =
-        ResponseEntity.ok(taskanaEngineConfiguration.getClassificationCategoriesByTypeMap());
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getClassificationCategoriesByTypeMap(), returning {}", response);
-    }
-    return response;
+    return ResponseEntity.ok(taskanaEngineConfiguration.getClassificationCategoriesByTypeMap());
   }
 
   /**
@@ -114,7 +85,6 @@ public class TaskanaEngineController {
    */
   @GetMapping(path = RestEndpoints.URL_CURRENT_USER)
   public ResponseEntity<TaskanaUserInfoRepresentationModel> getCurrentUserInfo() {
-    LOGGER.debug("Entry to getCurrentUserInfo()");
     TaskanaUserInfoRepresentationModel resource = new TaskanaUserInfoRepresentationModel();
     resource.setUserId(taskanaEngine.getCurrentUserContext().getUserid());
     resource.setGroupIds(taskanaEngine.getCurrentUserContext().getGroupIds());
@@ -123,12 +93,7 @@ public class TaskanaEngineController {
         resource.getRoles().add(role);
       }
     }
-    ResponseEntity<TaskanaUserInfoRepresentationModel> response = ResponseEntity.ok(resource);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getCurrentUserInfo(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(resource);
   }
 
   /**
@@ -138,9 +103,7 @@ public class TaskanaEngineController {
    */
   @GetMapping(path = RestEndpoints.URL_HISTORY_ENABLED)
   public ResponseEntity<Boolean> getIsHistoryProviderEnabled() {
-    ResponseEntity<Boolean> response = ResponseEntity.ok(taskanaEngine.isHistoryEnabled());
-    LOGGER.debug("Exit from getIsHistoryProviderEnabled(), returning {}", response);
-    return response;
+    return ResponseEntity.ok(taskanaEngine.isHistoryEnabled());
   }
 
   /**
@@ -150,11 +113,8 @@ public class TaskanaEngineController {
    */
   @GetMapping(path = RestEndpoints.URL_VERSION)
   public ResponseEntity<VersionRepresentationModel> currentVersion() {
-    LOGGER.debug("Entry to currentVersion()");
     VersionRepresentationModel resource = new VersionRepresentationModel();
     resource.setVersion(TaskanaEngineConfiguration.class.getPackage().getImplementationVersion());
-    ResponseEntity<VersionRepresentationModel> response = ResponseEntity.ok(resource);
-    LOGGER.debug("Exit from currentVersion(), returning {}", response);
-    return response;
+    return ResponseEntity.ok(resource);
   }
 }

rest/taskana-rest-spring/src/main/java/pro/taskana/common/rest/ldap/LdapClient.java

@@ -65,7 +65,6 @@ public class LdapClient {
    */
   public List<AccessIdRepresentationModel> searchUsersAndGroups(final String name)
       throws InvalidArgumentException {
-    LOGGER.debug("entry to searchUsersAndGroups(name = {})", name);
     isInitOrFail();
     testMinSearchForLength(name);
 
@@ -80,15 +79,7 @@ public class LdapClient {
       accessIds.addAll(searchGroupsByName(name));
     }
     sortListOfAccessIdResources(accessIds);
-    List<AccessIdRepresentationModel> result = getFirstPageOfaResultList(accessIds);
-
-    LOGGER.debug(
-        "exit from searchUsersAndGroups(name = {}). Returning {} users and groups: {}",
-        name,
-        accessIds.size(),
-        result);
-
-    return result;
+    return getFirstPageOfaResultList(accessIds);
   }
 
   public List<AccessIdRepresentationModel> searchUsersByNameOrAccessIdInUserRole(
@@ -137,7 +128,6 @@ public class LdapClient {
 
   public List<AccessIdRepresentationModel> searchUsersByNameOrAccessId(final String name)
       throws InvalidArgumentException {
-    LOGGER.debug("entry to searchUsersByNameOrAccessId(name = {}).", name);
     isInitOrFail();
     testMinSearchForLength(name);
 
@@ -151,20 +141,15 @@ public class LdapClient {
     orFilter.or(new WhitespaceWildcardsFilter(getUserIdAttribute(), name));
     andFilter.and(orFilter);
 
-    final List<AccessIdRepresentationModel> accessIds =
-        ldapTemplate.search(
-            getUserSearchBase(),
-            andFilter.encode(),
-            SearchControls.SUBTREE_SCOPE,
-            getLookUpUserAttributesToReturn(),
-            new UserContextMapper());
-    LOGGER.debug(
-        "exit from searchUsersByNameOrAccessId. Retrieved the following users: {}.", accessIds);
-    return accessIds;
+    return ldapTemplate.search(
+        getUserSearchBase(),
+        andFilter.encode(),
+        SearchControls.SUBTREE_SCOPE,
+        getLookUpUserAttributesToReturn(),
+        new UserContextMapper());
   }
 
   public List<AccessIdRepresentationModel> getUsersByAccessId(final String accessId) {
-    LOGGER.debug("entry to searchUsersByAccessId(name = {}).", accessId);
     isInitOrFail();
 
     final AndFilter andFilter = new AndFilter();
@@ -175,20 +160,16 @@ public class LdapClient {
       getUserFirstnameAttribute(), getUserLastnameAttribute(), getUserIdAttribute()
     };
 
-    final List<AccessIdRepresentationModel> accessIds =
-        ldapTemplate.search(
-            getUserSearchBase(),
-            andFilter.encode(),
-            SearchControls.SUBTREE_SCOPE,
-            userAttributesToReturn,
-            new UserContextMapper());
-    LOGGER.debug("exit from searchUsersByAccessId. Retrieved the following users: {}.", accessIds);
-    return accessIds;
+    return ldapTemplate.search(
+        getUserSearchBase(),
+        andFilter.encode(),
+        SearchControls.SUBTREE_SCOPE,
+        userAttributesToReturn,
+        new UserContextMapper());
   }
 
   public List<AccessIdRepresentationModel> searchGroupsByName(final String name)
       throws InvalidArgumentException {
-    LOGGER.debug("entry to searchGroupsByName(name = {}).", name);
     isInitOrFail();
     testMinSearchForLength(name);
 
@@ -201,37 +182,31 @@ public class LdapClient {
     }
     andFilter.and(orFilter);
 
-    final List<AccessIdRepresentationModel> accessIds =
-        ldapTemplate.search(
-            getGroupSearchBase(),
-            andFilter.encode(),
-            SearchControls.SUBTREE_SCOPE,
-            getLookUpGroupAttributesToReturn(),
-            new GroupContextMapper());
-    LOGGER.debug("Exit from searchGroupsByName. Retrieved the following groups: {}", accessIds);
-    return accessIds;
+    return ldapTemplate.search(
+        getGroupSearchBase(),
+        andFilter.encode(),
+        SearchControls.SUBTREE_SCOPE,
+        getLookUpGroupAttributesToReturn(),
+        new GroupContextMapper());
   }
 
   public AccessIdRepresentationModel searchAccessIdByDn(final String dn) {
-    LOGGER.debug("entry to searchGroupByDn(name = {}).", dn);
     isInitOrFail();
     // Obviously Spring LdapTemplate does have a inconsistency and always adds the base name to the
     // given DN.
     // https://stackoverflow.com/questions/55285743/spring-ldaptemplate-how-to-lookup-fully-qualified-dn-with-configured-base-dn
     // Therefore we have to remove the base name from the dn before performing the lookup
     String nameWithoutBaseDn = getNameWithoutBaseDn(dn);
-    LOGGER.debug(
-        "Removed baseDN {} from given DN. New DN to be used: {}", getBaseDn(), nameWithoutBaseDn);
-    final AccessIdRepresentationModel accessId =
-        ldapTemplate.lookup(
-            nameWithoutBaseDn, getLookUpUserAndGroupAttributesToReturn(), new DnContextMapper());
-    LOGGER.debug("Exit from searchGroupByDn. Retrieved the following group: {}", accessId);
-    return accessId;
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug(
+          "Removed baseDN {} from given DN. New DN to be used: {}", getBaseDn(), nameWithoutBaseDn);
+    }
+    return ldapTemplate.lookup(
+        nameWithoutBaseDn, getLookUpUserAndGroupAttributesToReturn(), new DnContextMapper());
   }
 
   public List<AccessIdRepresentationModel> searchGroupsAccessIdIsMemberOf(final String accessId)
       throws InvalidArgumentException {
-    LOGGER.debug("entry to searchGroupsAccessIdIsMemberOf(name = {}).", accessId);
     isInitOrFail();
     testMinSearchForLength(accessId);
 
@@ -252,18 +227,12 @@ public class LdapClient {
 
     String[] userAttributesToReturn = {getUserIdAttribute(), getGroupNameAttribute()};
 
-    final List<AccessIdRepresentationModel> accessIds =
-        ldapTemplate.search(
-            getGroupSearchBase(),
-            andFilter.encode(),
-            SearchControls.SUBTREE_SCOPE,
-            userAttributesToReturn,
-            new GroupContextMapper());
-
-    LOGGER.debug(
-        "exit from searchGroupsAccessIdIsMemberOf. Retrieved the following accessIds: {}.",
-        accessIds);
-    return accessIds;
+    return ldapTemplate.search(
+        getGroupSearchBase(),
+        andFilter.encode(),
+        SearchControls.SUBTREE_SCOPE,
+        userAttributesToReturn,
+        new GroupContextMapper());
   }
 
   /**
@@ -273,9 +242,6 @@ public class LdapClient {
    * @return whether the given name is valid or not
    */
   public boolean validateAccessId(final String name) {
-
-    LOGGER.debug("entry to validateAccessId(name = {})", name);
-
     isInitOrFail();
 
     if (nameIsDn(name)) {
@@ -446,7 +412,6 @@ public class LdapClient {
 
   @PostConstruct
   void init() {
-    LOGGER.debug("Entry to init()");
     minSearchForLength = calcMinSearchForLength(3);
     maxNumberOfReturnedAccessIds = calcMaxNumberOfReturnedAccessIds(50);
 
@@ -459,8 +424,6 @@ public class LdapClient {
       throw new SystemException(message);
     }
     active = true;
-
-    LOGGER.debug("Exit from init()");
   }
 
   List<LdapSettings> checkForMissingConfigurations() {

rest/taskana-rest-spring/src/main/java/pro/taskana/monitor/rest/MonitorController.java

@@ -5,8 +5,6 @@ import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
 import org.springframework.http.HttpStatus;
@@ -31,8 +29,6 @@ import pro.taskana.task.api.TaskState;
 @EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
 public class MonitorController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(MonitorController.class);
-
   private final MonitorService monitorService;
 
   private final ReportRepresentationModelAssembler reportRepresentationModelAssembler;
@@ -56,7 +52,6 @@ public class MonitorController {
    * @param states Filter the report values by Task states.
    * @param workbasketIds Filter the report values by Workbasket Ids.
    * @param priorityMinimum Filter the report values by a minimum priority.
-   *
    * @return the computed TaskStatusReport
    * @throws NotAuthorizedException if the current user is not authorized to compute the report
    * @title Get a Task Status Report
@@ -69,26 +64,20 @@ public class MonitorController {
       @RequestParam(name = "workbasket-ids", required = false) List<String> workbasketIds,
       @RequestParam(name = "priority-minimum", required = false) Integer priorityMinimum)
       throws NotAuthorizedException {
-    LOGGER.debug("Entry to getTasksStatusReport(), states to include {}", states);
-    ResponseEntity<ReportRepresentationModel> response =
-        ResponseEntity.ok(
-            reportRepresentationModelAssembler.toModel(
-                monitorService
-                    .createTaskStatusReportBuilder()
-                    .stateIn(states)
-                    .domainIn(domains)
-                    .workbasketIdsIn(workbasketIds)
-                    .priorityMinimum(priorityMinimum)
-                    .buildReport(),
-                domains,
-                states,
-                workbasketIds,
-                priorityMinimum));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTasksStatusReport(), returning {}", response);
-    }
 
-    return response;
+    return ResponseEntity.ok(
+        reportRepresentationModelAssembler.toModel(
+            monitorService
+                .createTaskStatusReportBuilder()
+                .stateIn(states)
+                .domainIn(domains)
+                .workbasketIdsIn(workbasketIds)
+                .priorityMinimum(priorityMinimum)
+                .buildReport(),
+            domains,
+            states,
+            workbasketIds,
+            priorityMinimum));
   }
 
   /**
@@ -111,7 +100,6 @@ public class MonitorController {
       @RequestParam List<TaskState> states,
       @RequestParam(required = false) TaskTimestamp taskTimestamp)
       throws NotAuthorizedException, InvalidArgumentException {
-    LOGGER.debug("Entry to getTasksWorkbasketReport(), states to include {}", states);
     if (taskTimestamp == null) {
       taskTimestamp = TaskTimestamp.DUE;
     }
@@ -126,10 +114,6 @@ public class MonitorController {
             states,
             taskTimestamp);
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTasksWorkbasketReport(), returning {}", report);
-    }
-
     return ResponseEntity.status(HttpStatus.OK).body(report);
   }
 
@@ -140,12 +124,6 @@ public class MonitorController {
       @RequestParam(value = "daysInPast") int daysInPast,
       @RequestParam(value = "states") List<TaskState> states)
       throws NotAuthorizedException, InvalidArgumentException {
-    LOGGER.debug(
-        "Entry to getTasksWorkbasketPlannedDateReport(), "
-            + "upto {} days in the past, states to include {}",
-        daysInPast,
-        states);
-
     ReportRepresentationModel report =
         reportRepresentationModelAssembler.toModel(
             monitorService
@@ -155,9 +133,6 @@ public class MonitorController {
                 .buildReport(TaskTimestamp.PLANNED),
             daysInPast,
             states);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTasksWorkbasketPlannedDateReport(), returning {}", report);
-    }
 
     return ResponseEntity.status(HttpStatus.OK).body(report);
   }
@@ -180,7 +155,6 @@ public class MonitorController {
   public ResponseEntity<ReportRepresentationModel> getClassificationReport(
       @RequestParam(required = false) TaskTimestamp taskTimestamp)
       throws NotAuthorizedException, InvalidArgumentException {
-    LOGGER.debug("Entry to getClassificationReport()");
     if (taskTimestamp == null) {
       taskTimestamp = TaskTimestamp.DUE;
     }
@@ -193,10 +167,6 @@ public class MonitorController {
                 .buildReport(taskTimestamp),
             taskTimestamp);
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getClassificationReport(), returning {}", report);
-    }
-
     return ResponseEntity.status(HttpStatus.OK).body(report);
   }
 

rest/taskana-rest-spring/src/main/java/pro/taskana/task/rest/TaskCommentController.java

@@ -3,8 +3,6 @@ package pro.taskana.task.rest;
 import java.util.Comparator;
 import java.util.List;
 import java.util.Optional;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
 import org.springframework.hateoas.config.EnableHypermediaSupport.HypermediaType;
@@ -39,8 +37,6 @@ import pro.taskana.task.rest.models.TaskCommentRepresentationModel;
 @EnableHypermediaSupport(type = HypermediaType.HAL)
 public class TaskCommentController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TaskCommentController.class);
-
   private final TaskService taskService;
   private final TaskCommentRepresentationModelAssembler taskCommentRepresentationModelAssembler;
 
@@ -69,23 +65,12 @@ public class TaskCommentController {
       @PathVariable String taskCommentId)
       throws NotAuthorizedException, TaskNotFoundException, TaskCommentNotFoundException,
           InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to getTaskComment(taskCommentId= {})", taskCommentId);
-    }
-
     TaskComment taskComment = taskService.getTaskComment(taskCommentId);
 
     TaskCommentRepresentationModel taskCommentRepresentationModel =
         taskCommentRepresentationModelAssembler.toModel(taskComment);
 
-    ResponseEntity<TaskCommentRepresentationModel> response =
-        ResponseEntity.ok(taskCommentRepresentationModel);
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTaskComment(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(taskCommentRepresentationModel);
   }
 
   /**
@@ -113,11 +98,6 @@ public class TaskCommentController {
       @RequestParam(name = "sort-by", required = false) List<TaskCommentsSortBy> sortBy,
       @RequestParam(required = false) List<SortDirection> order)
       throws NotAuthorizedException, TaskNotFoundException, InvalidArgumentException {
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to getTaskComments(taskId= {})", taskId);
-    }
-
     Optional<Comparator<TaskComment>> comparator = getTaskCommentComparator(sortBy, order);
     List<TaskComment> taskComments = taskService.getTaskComments(taskId);
     comparator.ifPresent(taskComments::sort);
@@ -125,14 +105,7 @@ public class TaskCommentController {
     TaskCommentCollectionRepresentationModel taskCommentListResource =
         taskCommentRepresentationModelAssembler.toTaskanaCollectionModel(taskComments);
 
-    ResponseEntity<TaskCommentCollectionRepresentationModel> response =
-        ResponseEntity.ok(taskCommentListResource);
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTaskComments(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(taskCommentListResource);
   }
 
   /**
@@ -153,19 +126,9 @@ public class TaskCommentController {
       @PathVariable String taskCommentId)
       throws NotAuthorizedException, TaskNotFoundException, TaskCommentNotFoundException,
           InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to deleteTaskComment(taskCommentId= {})", taskCommentId);
-    }
-
     taskService.deleteTaskComment(taskCommentId);
 
-    ResponseEntity<TaskCommentRepresentationModel> result = ResponseEntity.noContent().build();
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from deleteTaskComment(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.noContent().build();
   }
 
   /**
@@ -189,12 +152,6 @@ public class TaskCommentController {
       @RequestBody TaskCommentRepresentationModel taskCommentRepresentationModel)
       throws NotAuthorizedException, TaskNotFoundException, TaskCommentNotFoundException,
           InvalidArgumentException, ConcurrencyException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "Entry to updateTaskComment(taskCommentId= {}, taskCommentResource= {})",
-          taskCommentId,
-          taskCommentRepresentationModel);
-    }
     if (!taskCommentId.equals(taskCommentRepresentationModel.getTaskCommentId())) {
       throw new InvalidArgumentException(
           String.format(
@@ -207,14 +164,8 @@ public class TaskCommentController {
         taskCommentRepresentationModelAssembler.toEntityModel(taskCommentRepresentationModel);
 
     taskComment = taskService.updateTaskComment(taskComment);
-    ResponseEntity<TaskCommentRepresentationModel> result =
-        ResponseEntity.ok(taskCommentRepresentationModelAssembler.toModel(taskComment));
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from updateTaskComment(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.ok(taskCommentRepresentationModelAssembler.toModel(taskComment));
   }
 
   /**
@@ -234,31 +185,14 @@ public class TaskCommentController {
       @PathVariable String taskId,
       @RequestBody TaskCommentRepresentationModel taskCommentRepresentationModel)
       throws NotAuthorizedException, InvalidArgumentException, TaskNotFoundException {
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "Entry to createTaskComment(taskId= {}, taskCommentResource= {})",
-          taskId,
-          taskCommentRepresentationModel);
-    }
-
     taskCommentRepresentationModel.setTaskId(taskId);
 
     TaskComment taskCommentFromResource =
         taskCommentRepresentationModelAssembler.toEntityModel(taskCommentRepresentationModel);
     TaskComment createdTaskComment = taskService.createTaskComment(taskCommentFromResource);
 
-    ResponseEntity<TaskCommentRepresentationModel> result;
-
-    result =
-        ResponseEntity.status(HttpStatus.CREATED)
-            .body(taskCommentRepresentationModelAssembler.toModel(createdTaskComment));
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from createTaskComment(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .body(taskCommentRepresentationModelAssembler.toModel(createdTaskComment));
   }
 
   private Optional<Comparator<TaskComment>> getTaskCommentComparator(

rest/taskana-rest-spring/src/main/java/pro/taskana/task/rest/TaskController.java

@@ -5,8 +5,6 @@ import java.util.List;
 import java.util.function.BiConsumer;
 import java.util.stream.Collectors;
 import javax.servlet.http.HttpServletRequest;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
 import org.springframework.hateoas.config.EnableHypermediaSupport.HypermediaType;
@@ -54,8 +52,6 @@ import pro.taskana.workbasket.api.exceptions.WorkbasketNotFoundException;
 @EnableHypermediaSupport(type = HypermediaType.HAL)
 public class TaskController {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TaskController.class);
-
   private final TaskService taskService;
   private final TaskRepresentationModelAssembler taskRepresentationModelAssembler;
   private final TaskSummaryRepresentationModelAssembler taskSummaryRepresentationModelAssembler;
@@ -104,12 +100,7 @@ public class TaskController {
     TaskSummaryPagedRepresentationModel pagedModels =
         taskSummaryRepresentationModelAssembler.toPagedModel(
             taskSummaries, pagingParameter.getPageMetadata());
-    ResponseEntity<TaskSummaryPagedRepresentationModel> response = ResponseEntity.ok(pagedModels);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTasks(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(pagedModels);
   }
 
   /**
@@ -144,14 +135,9 @@ public class TaskController {
             .filter(summary -> !result.getFailedIds().contains(summary.getId()))
             .collect(Collectors.toList());
 
-    ResponseEntity<TaskSummaryCollectionRepresentationModel> response =
-        ResponseEntity.ok(
-            taskSummaryRepresentationModelAssembler.toTaskanaCollectionModel(
-                successfullyDeletedTaskSummaries));
-
-    LOGGER.debug("Exit from deleteTasks(), returning {}", response);
-
-    return response;
+    return ResponseEntity.ok(
+        taskSummaryRepresentationModelAssembler.toTaskanaCollectionModel(
+            successfullyDeletedTaskSummaries));
   }
 
   /**
@@ -167,15 +153,9 @@ public class TaskController {
   @Transactional(readOnly = true, rollbackFor = Exception.class)
   public ResponseEntity<TaskRepresentationModel> getTask(@PathVariable String taskId)
       throws TaskNotFoundException, NotAuthorizedException {
-    LOGGER.debug("Entry to getTask(taskId= {})", taskId);
     Task task = taskService.getTask(taskId);
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(task));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTask(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(task));
   }
 
   /**
@@ -197,17 +177,10 @@ public class TaskController {
       @PathVariable String taskId, @RequestBody(required = false) String userName)
       throws TaskNotFoundException, InvalidStateException, InvalidOwnerException,
           NotAuthorizedException {
-    LOGGER.debug("Entry to claimTask(taskId= {}, userName= {})", taskId, userName);
     // TODO verify user
     taskService.claim(taskId);
     Task updatedTask = taskService.getTask(taskId);
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from claimTask(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
   }
 
   /**
@@ -226,8 +199,6 @@ public class TaskController {
   public ResponseEntity<TaskRepresentationModel> selectAndClaimTask(
       TaskQueryFilterParameter filterParameter, TaskQuerySortParameter sortParameter)
       throws InvalidOwnerException, NotAuthorizedException {
-    LOGGER.debug("Entry to selectAndClaimTask");
-
     TaskQuery query = taskService.createTaskQuery();
 
     filterParameter.applyToQuery(query);
@@ -235,13 +206,7 @@ public class TaskController {
 
     Task selectedAndClaimedTask = taskService.selectAndClaim(query);
 
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(selectedAndClaimedTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from selectAndClaimTask(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(selectedAndClaimedTask));
   }
 
   /**
@@ -262,17 +227,9 @@ public class TaskController {
   public ResponseEntity<TaskRepresentationModel> cancelClaimTask(@PathVariable String taskId)
       throws TaskNotFoundException, InvalidStateException, InvalidOwnerException,
           NotAuthorizedException {
-
-    LOGGER.debug("Entry to cancelClaimTask(taskId= {}", taskId);
-
     Task updatedTask = taskService.cancelClaim(taskId);
 
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from cancelClaimTask(), returning {}", result);
-    }
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
   }
 
   /**
@@ -292,17 +249,8 @@ public class TaskController {
   public ResponseEntity<TaskRepresentationModel> forceCancelClaimTask(@PathVariable String taskId)
       throws TaskNotFoundException, InvalidStateException, InvalidOwnerException,
           NotAuthorizedException {
-
-    LOGGER.debug("Entry to forceCancelClaimTask(taskId= {}", taskId);
-
     Task updatedTask = taskService.forceCancelClaim(taskId);
-
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from forceCancelClaimTask(), returning {}", result);
-    }
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
   }
 
   /**
@@ -322,16 +270,10 @@ public class TaskController {
   public ResponseEntity<TaskRepresentationModel> completeTask(@PathVariable String taskId)
       throws TaskNotFoundException, InvalidOwnerException, InvalidStateException,
           NotAuthorizedException {
-    LOGGER.debug("Entry to completeTask(taskId= {})", taskId);
 
     Task updatedTask = taskService.forceCompleteTask(taskId);
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from completeTask(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
   }
 
   /**
@@ -349,11 +291,9 @@ public class TaskController {
   @Transactional(rollbackFor = Exception.class)
   public ResponseEntity<TaskRepresentationModel> deleteTask(@PathVariable String taskId)
       throws TaskNotFoundException, InvalidStateException, NotAuthorizedException {
-    LOGGER.debug("Entry to deleteTask(taskId= {})", taskId);
     taskService.forceDeleteTask(taskId);
-    ResponseEntity<TaskRepresentationModel> result = ResponseEntity.noContent().build();
-    LOGGER.debug("Exit from deleteTask(), returning {}", result);
-    return result;
+
+    return ResponseEntity.noContent().build();
   }
 
   /**
@@ -372,16 +312,10 @@ public class TaskController {
   @Transactional(rollbackFor = Exception.class)
   public ResponseEntity<TaskRepresentationModel> cancelTask(@PathVariable String taskId)
       throws TaskNotFoundException, NotAuthorizedException, InvalidStateException {
-    LOGGER.debug("Entry to cancelTask(taskId= {})", taskId);
 
     Task cancelledTask = taskService.cancelTask(taskId);
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(cancelledTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from cancelTask(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(cancelledTask));
   }
 
   /**
@@ -403,21 +337,11 @@ public class TaskController {
       @RequestBody TaskRepresentationModel taskRepresentationModel)
       throws WorkbasketNotFoundException, ClassificationNotFoundException, NotAuthorizedException,
           TaskAlreadyExistException, InvalidArgumentException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to createTask(params= {})", taskRepresentationModel);
-    }
-
     Task fromResource = taskRepresentationModelAssembler.toEntityModel(taskRepresentationModel);
     Task createdTask = taskService.createTask(fromResource);
 
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.status(HttpStatus.CREATED)
-            .body(taskRepresentationModelAssembler.toModel(createdTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from createTask(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .body(taskRepresentationModelAssembler.toModel(createdTask));
   }
 
   /**
@@ -441,17 +365,10 @@ public class TaskController {
       @RequestBody(required = false) Boolean setTransferFlag)
       throws TaskNotFoundException, WorkbasketNotFoundException, NotAuthorizedException,
           InvalidStateException {
-    LOGGER.debug("Entry to transferTask(taskId= {}, workbasketId= {})", taskId, workbasketId);
-
     Task updatedTask =
         taskService.transfer(taskId, workbasketId, setTransferFlag == null || setTransferFlag);
-    ResponseEntity<TaskRepresentationModel> result =
-        ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from transferTask(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(updatedTask));
   }
 
   /**
@@ -480,26 +397,16 @@ public class TaskController {
       throws TaskNotFoundException, ClassificationNotFoundException, InvalidArgumentException,
           ConcurrencyException, NotAuthorizedException, AttachmentPersistenceException,
           InvalidStateException {
-    LOGGER.debug(
-        "Entry to updateTask(taskId= {}, taskResource= {})", taskId, taskRepresentationModel);
-    ResponseEntity<TaskRepresentationModel> result;
-    if (taskId.equals(taskRepresentationModel.getTaskId())) {
-      Task task = taskRepresentationModelAssembler.toEntityModel(taskRepresentationModel);
-      task = taskService.updateTask(task);
-      result = ResponseEntity.ok(taskRepresentationModelAssembler.toModel(task));
-    } else {
+    if (!taskId.equals(taskRepresentationModel.getTaskId())) {
       throw new InvalidArgumentException(
           String.format(
               "TaskId ('%s') is not identical with the taskId of to "
                   + "object in the payload which should be updated. ID=('%s')",
               taskId, taskRepresentationModel.getTaskId()));
     }
-
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from updateTask(), returning {}", result);
-    }
-
-    return result;
+    Task task = taskRepresentationModelAssembler.toEntityModel(taskRepresentationModel);
+    task = taskService.updateTask(task);
+    return ResponseEntity.ok(taskRepresentationModelAssembler.toModel(task));
   }
 
   public enum TaskQuerySortBy implements QuerySortBy<TaskQuery> {

rest/taskana-rest-spring/src/main/java/pro/taskana/workbasket/rest/WorkbasketAccessItemController.java

@@ -4,8 +4,6 @@ import java.beans.ConstructorProperties;
 import java.util.List;
 import java.util.function.BiConsumer;
 import javax.servlet.http.HttpServletRequest;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
 import org.springframework.http.ResponseEntity;
@@ -34,9 +32,6 @@ import pro.taskana.workbasket.rest.models.WorkbasketAccessItemPagedRepresentatio
 @EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
 public class WorkbasketAccessItemController {
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(WorkbasketAccessItemController.class);
-
   private final LdapClient ldapClient;
   private final WorkbasketService workbasketService;
   private final WorkbasketAccessItemRepresentationModelAssembler modelAssembler;
@@ -85,13 +80,7 @@ public class WorkbasketAccessItemController {
     WorkbasketAccessItemPagedRepresentationModel pagedResources =
         modelAssembler.toPagedModel(workbasketAccessItems, pagingParameter.getPageMetadata());
 
-    ResponseEntity<WorkbasketAccessItemPagedRepresentationModel> response =
-        ResponseEntity.ok(pagedResources);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getWorkbasketAccessItems(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(pagedResources);
   }
 
   /**
@@ -107,7 +96,6 @@ public class WorkbasketAccessItemController {
   public ResponseEntity<Void> removeWorkbasketAccessItems(
       @RequestParam("access-id") String accessId)
       throws NotAuthorizedException, InvalidArgumentException {
-    LOGGER.debug("Entry to removeWorkbasketAccessItems(access-id= {})", accessId);
     if (ldapClient.isUser(accessId)) {
       List<WorkbasketAccessItem> workbasketAccessItemList =
           workbasketService.createWorkbasketAccessItemQuery().accessIdIn(accessId).list();
@@ -122,9 +110,7 @@ public class WorkbasketAccessItemController {
               accessId));
     }
 
-    ResponseEntity<Void> response = ResponseEntity.noContent().build();
-    LOGGER.debug("Exit from removeWorkbasketAccessItems(), returning {}", response);
-    return response;
+    return ResponseEntity.noContent().build();
   }
 
   public enum WorkbasketAccessItemSortBy implements QuerySortBy<WorkbasketAccessItemQuery> {

rest/taskana-rest-spring/src/main/java/pro/taskana/workbasket/rest/WorkbasketController.java

@@ -113,13 +113,7 @@ public class WorkbasketController {
         workbasketSummaryRepresentationModelAssembler.toPagedModel(
             workbasketSummaries, pagingParameter.getPageMetadata());
 
-    ResponseEntity<WorkbasketSummaryPagedRepresentationModel> response =
-        ResponseEntity.ok(pagedModels);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getWorkbaskets(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(pagedModels);
   }
 
   /**
@@ -137,15 +131,9 @@ public class WorkbasketController {
   public ResponseEntity<WorkbasketRepresentationModel> getWorkbasket(
       @PathVariable(value = "workbasketId") String workbasketId)
       throws WorkbasketNotFoundException, NotAuthorizedException {
-    LOGGER.debug("Entry to getWorkbasket(workbasketId= {})", workbasketId);
-    ResponseEntity<WorkbasketRepresentationModel> result;
     Workbasket workbasket = workbasketService.getWorkbasket(workbasketId);
-    result = ResponseEntity.ok(workbasketRepresentationModelAssembler.toModel(workbasket));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getWorkbasket(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(workbasketRepresentationModelAssembler.toModel(workbasket));
   }
 
   /**
@@ -174,22 +162,21 @@ public class WorkbasketController {
       @PathVariable(value = "workbasketId") String workbasketId)
       throws NotAuthorizedException, InvalidArgumentException, WorkbasketNotFoundException,
           WorkbasketInUseException {
-    LOGGER.debug("Entry to markWorkbasketForDeletion(workbasketId= {})", workbasketId);
-    ResponseEntity<WorkbasketRepresentationModel> response;
 
     boolean workbasketDeleted = workbasketService.deleteWorkbasket(workbasketId);
 
     if (workbasketDeleted) {
-      LOGGER.debug("Workbasket successfully deleted.");
-      response = ResponseEntity.noContent().build();
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug("Workbasket successfully deleted.");
+      }
+      return ResponseEntity.noContent().build();
     } else {
-      LOGGER.debug(
-          "Workbasket was only marked for deletion and will be physically deleted later on.");
-      response = ResponseEntity.accepted().build();
+      if (LOGGER.isDebugEnabled()) {
+        LOGGER.debug(
+            "Workbasket was only marked for deletion and will be physically deleted later on.");
+      }
+      return ResponseEntity.accepted().build();
     }
-
-    LOGGER.debug("Exit from markWorkbasketForDeletion(), returning {}", response);
-    return response;
   }
 
   /**
@@ -210,22 +197,12 @@ public class WorkbasketController {
       @RequestBody WorkbasketRepresentationModel workbasketRepresentationModel)
       throws InvalidWorkbasketException, NotAuthorizedException, WorkbasketAlreadyExistException,
           DomainNotFoundException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "Entry to createWorkbasket(workbasketResource= {})", workbasketRepresentationModel);
-    }
-
     Workbasket workbasket =
         workbasketRepresentationModelAssembler.toEntityModel(workbasketRepresentationModel);
     workbasket = workbasketService.createWorkbasket(workbasket);
-    ResponseEntity<WorkbasketRepresentationModel> response =
-        ResponseEntity.status(HttpStatus.CREATED)
-            .body(workbasketRepresentationModelAssembler.toModel(workbasket));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from createWorkbasket(), returning {}", response);
-    }
 
-    return response;
+    return ResponseEntity.status(HttpStatus.CREATED)
+        .body(workbasketRepresentationModelAssembler.toModel(workbasket));
   }
 
   /**
@@ -249,7 +226,6 @@ public class WorkbasketController {
       @RequestBody WorkbasketRepresentationModel workbasketRepresentationModel)
       throws InvalidWorkbasketException, WorkbasketNotFoundException, NotAuthorizedException,
           ConcurrencyException {
-    LOGGER.debug("Entry to updateWorkbasket(workbasketId= {})", workbasketId);
     if (!workbasketId.equals(workbasketRepresentationModel.getWorkbasketId())) {
       throw new InvalidWorkbasketException(
           "Target-WB-ID('"
@@ -261,14 +237,8 @@ public class WorkbasketController {
     Workbasket workbasket =
         workbasketRepresentationModelAssembler.toEntityModel(workbasketRepresentationModel);
     workbasket = workbasketService.updateWorkbasket(workbasket);
-    ResponseEntity<WorkbasketRepresentationModel> result =
-        ResponseEntity.ok(workbasketRepresentationModelAssembler.toModel(workbasket));
 
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from updateWorkbasket(), returning {}", result);
-    }
-
-    return result;
+    return ResponseEntity.ok(workbasketRepresentationModelAssembler.toModel(workbasket));
   }
 
   /**
@@ -288,19 +258,12 @@ public class WorkbasketController {
   public ResponseEntity<WorkbasketAccessItemCollectionRepresentationModel> getWorkbasketAccessItems(
       @PathVariable(value = "workbasketId") String workbasketId)
       throws NotAuthorizedException, WorkbasketNotFoundException {
-    LOGGER.debug("Entry to getWorkbasketAccessItems(workbasketId= {})", workbasketId);
-
     List<WorkbasketAccessItem> accessItems =
         workbasketService.getWorkbasketAccessItems(workbasketId);
-    final ResponseEntity<WorkbasketAccessItemCollectionRepresentationModel> result =
-        ResponseEntity.ok(
-            workbasketAccessItemRepresentationModelAssembler
-                .toTaskanaCollectionModelForSingleWorkbasket(workbasketId, accessItems));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getWorkbasketAccessItems(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(
+        workbasketAccessItemRepresentationModelAssembler
+            .toTaskanaCollectionModelForSingleWorkbasket(workbasketId, accessItems));
   }
 
   /**
@@ -325,7 +288,6 @@ public class WorkbasketController {
       @RequestBody WorkbasketAccessItemCollectionRepresentationModel workbasketAccessItemRepModels)
       throws NotAuthorizedException, InvalidArgumentException, WorkbasketNotFoundException,
           WorkbasketAccessItemAlreadyExistException {
-    LOGGER.debug("Entry to setWorkbasketAccessItems(workbasketId= {})", workbasketId);
     if (workbasketAccessItemRepModels == null) {
       throw new InvalidArgumentException("Can´t create something with NULL body-value.");
     }
@@ -338,15 +300,9 @@ public class WorkbasketController {
     List<WorkbasketAccessItem> updatedWbAccessItems =
         workbasketService.getWorkbasketAccessItems(workbasketId);
 
-    ResponseEntity<WorkbasketAccessItemCollectionRepresentationModel> response =
-        ResponseEntity.ok(
-            workbasketAccessItemRepresentationModelAssembler
-                .toTaskanaCollectionModelForSingleWorkbasket(workbasketId, updatedWbAccessItems));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from setWorkbasketAccessItems(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(
+        workbasketAccessItemRepresentationModelAssembler
+            .toTaskanaCollectionModelForSingleWorkbasket(workbasketId, updatedWbAccessItems));
   }
 
   /**
@@ -366,19 +322,12 @@ public class WorkbasketController {
   public ResponseEntity<DistributionTargetsCollectionRepresentationModel> getDistributionTargets(
       @PathVariable(value = "workbasketId") String workbasketId)
       throws WorkbasketNotFoundException, NotAuthorizedException {
-
-    LOGGER.debug("Entry to getDistributionTargets(workbasketId= {})", workbasketId);
     List<WorkbasketSummary> distributionTargets =
         workbasketService.getDistributionTargets(workbasketId);
     DistributionTargetsCollectionRepresentationModel distributionTargetRepModels =
         workbasketSummaryRepresentationModelAssembler.toTaskanaCollectionModel(distributionTargets);
-    ResponseEntity<DistributionTargetsCollectionRepresentationModel> result =
-        ResponseEntity.ok(distributionTargetRepModels);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getDistributionTargets(), returning {}", result);
-    }
 
-    return result;
+    return ResponseEntity.ok(distributionTargetRepModels);
   }
 
   /**
@@ -399,26 +348,14 @@ public class WorkbasketController {
           @PathVariable(value = "workbasketId") String sourceWorkbasketId,
           @RequestBody List<String> targetWorkbasketIds)
           throws WorkbasketNotFoundException, NotAuthorizedException {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug(
-          "Entry to getTasksStatusReport(workbasketId= {}, targetWorkbasketIds´= {})",
-          sourceWorkbasketId,
-          targetWorkbasketIds);
-    }
-
     workbasketService.setDistributionTargets(sourceWorkbasketId, targetWorkbasketIds);
 
     List<WorkbasketSummary> distributionTargets =
         workbasketService.getDistributionTargets(sourceWorkbasketId);
-    ResponseEntity<DistributionTargetsCollectionRepresentationModel> response =
-        ResponseEntity.ok(
-            workbasketSummaryRepresentationModelAssembler.toTaskanaCollectionModel(
-                distributionTargets));
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from getTasksStatusReport(), returning {}", response);
-    }
 
-    return response;
+    return ResponseEntity.ok(
+        workbasketSummaryRepresentationModelAssembler.toTaskanaCollectionModel(
+            distributionTargets));
   }
 
   /**
@@ -435,18 +372,13 @@ public class WorkbasketController {
   public ResponseEntity<Void> removeDistributionTargetForWorkbasketId(
       @PathVariable(value = "workbasketId") String targetWorkbasketId)
       throws WorkbasketNotFoundException, NotAuthorizedException {
-    LOGGER.debug(
-        "Entry to removeDistributionTargetForWorkbasketId(workbasketId= {})", targetWorkbasketId);
-
     List<WorkbasketSummary> sourceWorkbaskets =
         workbasketService.getDistributionSources(targetWorkbasketId);
     for (WorkbasketSummary source : sourceWorkbaskets) {
       workbasketService.removeDistributionTarget(source.getId(), targetWorkbasketId);
     }
 
-    ResponseEntity<Void> response = ResponseEntity.noContent().build();
-    LOGGER.debug("Exit from removeDistributionTargetForWorkbasketId(), returning {}", response);
-    return response;
+    return ResponseEntity.noContent().build();
   }
 
   public enum WorkbasketQuerySortBy implements QuerySortBy<WorkbasketQuery> {

rest/taskana-rest-spring/src/main/java/pro/taskana/workbasket/rest/WorkbasketDefinitionController.java

@@ -6,7 +6,6 @@ import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -15,8 +14,6 @@ import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.DuplicateKeyException;
 import org.springframework.hateoas.config.EnableHypermediaSupport;
@@ -56,9 +53,6 @@ import pro.taskana.workbasket.rest.models.WorkbasketRepresentationModel;
 @EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
 public class WorkbasketDefinitionController {
 
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(WorkbasketDefinitionController.class);
-
   private final WorkbasketService workbasketService;
   private final WorkbasketDefinitionRepresentationModelAssembler workbasketDefinitionAssembler;
   private final WorkbasketRepresentationModelAssembler workbasketAssembler;
@@ -91,9 +85,6 @@ public class WorkbasketDefinitionController {
   @Transactional(readOnly = true, rollbackFor = Exception.class)
   public ResponseEntity<WorkbasketDefinitionCollectionRepresentationModel> exportWorkbaskets(
       @RequestParam(required = false) String[] domain) {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Entry to exportWorkbaskets(domain= {})", Arrays.toString(domain));
-    }
     WorkbasketQuery query = workbasketService.createWorkbasketQuery();
     Optional.ofNullable(domain).ifPresent(query::domainIn);
 
@@ -107,13 +98,7 @@ public class WorkbasketDefinitionController {
                 Collectors.collectingAndThen(
                     Collectors.toList(), workbasketDefinitionAssembler::toTaskanaCollectionModel));
 
-    ResponseEntity<WorkbasketDefinitionCollectionRepresentationModel> response =
-        ResponseEntity.ok(pageModel);
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("Exit from exportWorkbaskets(), returning {}", response);
-    }
-
-    return response;
+    return ResponseEntity.ok(pageModel);
   }
 
   /**
@@ -147,7 +132,6 @@ public class WorkbasketDefinitionController {
           InvalidWorkbasketException, WorkbasketAlreadyExistException, WorkbasketNotFoundException,
           InvalidArgumentException, WorkbasketAccessItemAlreadyExistException,
           ConcurrencyException {
-    LOGGER.debug("Entry to importWorkbaskets()");
     WorkbasketDefinitionCollectionRepresentationModel definitions =
         mapper.readValue(
             file.getInputStream(),
@@ -228,9 +212,7 @@ public class WorkbasketDefinitionController {
           // no verification necessary since the workbasket was already imported in step 1.
           idConversion.get(definition.getWorkbasket().getWorkbasketId()), distributionTargets);
     }
-    ResponseEntity<Void> response = ResponseEntity.noContent().build();
-    LOGGER.debug("Exit from importWorkbaskets(), returning {}", response);
-    return response;
+    return ResponseEntity.noContent().build();
   }
 
   private Workbasket removeId(Workbasket importedWb) {

rest/taskana-rest-spring/src/test/java/pro/taskana/classification/rest/ClassificationDefinitionControllerIntTest.java

@@ -383,7 +383,9 @@ class ClassificationDefinitionControllerIntTest {
     ResponseEntity<Void> response = importRequest(clList);
     assertThat(response.getStatusCode()).isEqualTo(HttpStatus.NO_CONTENT);
     Thread.sleep(10);
-    LOGGER.debug("Wait 10 ms to give the system a chance to update");
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Wait 10 ms to give the system a chance to update");
+    }
 
     ClassificationRepresentationModel childWithNewParent =
         this.getClassificationWithKeyAndDomain("L110105", "DOMAIN_A");
@@ -415,7 +417,9 @@ class ClassificationDefinitionControllerIntTest {
 
   private ResponseEntity<Void> importRequest(ClassificationCollectionRepresentationModel clList)
       throws Exception {
-    LOGGER.debug("Start Import");
+    if (LOGGER.isDebugEnabled()) {
+      LOGGER.debug("Start Import");
+    }
     File tmpFile = File.createTempFile("test", ".tmp");
     try (FileOutputStream out = new FileOutputStream(tmpFile);
         OutputStreamWriter writer = new OutputStreamWriter(out, StandardCharsets.UTF_8)) {

routing/taskana-spi-routing-dmn-router/pom.xml

@@ -16,6 +16,11 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>pro.taskana</groupId>
       <artifactId>taskana-core</artifactId>

web/pom.xml

@@ -18,6 +18,14 @@
     <sonar.skip>true</sonar.skip>
   </properties>
 
+  <dependencies>
+    <dependency>
+      <groupId>pro.taskana</groupId>
+      <artifactId>taskana-common-logging</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+  </dependencies>
+
   <build>
     <plugins>
       <plugin>