Exercise 2

app/app/pom.xml

@@ -15,10 +15,18 @@
     <packaging>jar</packaging>
 
     <dependencies>
+        <dependency>
+            <groupId>com.workshop</groupId>
+            <artifactId>library-autoconfigure</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.workshop</groupId>
             <artifactId>library-api</artifactId>
         </dependency>
+        <dependency>
+            <groupId>com.workshop</groupId>
+            <artifactId>library-stdout</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter</artifactId>

app/app/src/main/java/com/workshop/magic/app/MyGreetingService.java

@@ -2,9 +2,7 @@ package com.workshop.magic.app;
 
 import com.workshop.magic.service.AbstractGreetingService;
 
-import org.springframework.stereotype.Service;
+//@Service
-
-@Service
 class MyGreetingService extends AbstractGreetingService {
 
     @Override

components/library-autoconfigure/pom.xml

@@ -13,4 +13,20 @@
 
     <artifactId>library-autoconfigure</artifactId>
 
+    <dependencies>
+        <dependency>
+            <groupId>com.workshop</groupId>
+            <artifactId>library-api</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>com.workshop</groupId>
+            <artifactId>library-stdout</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-autoconfigure</artifactId>
+        </dependency>
+    </dependencies>
 </project>

components/library-autoconfigure/src/main/java/com/workshop/magic/config/GreetingAutoConfiguration.java

@@ -0,0 +1,22 @@
+package com.workshop.magic.config;
+
+import com.workshop.magic.service.GreetingService;
+import com.workshop.magic.service.stdout.StdOutGreetingService;
+
+import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+
+@AutoConfiguration
+@ConditionalOnClass(GreetingService.class)
+public class GreetingAutoConfiguration {
+
+    @Bean
+    @ConditionalOnMissingBean
+    @ConditionalOnClass(StdOutGreetingService.class)
+    GreetingService stdOutGreetingService() {
+        return new StdOutGreetingService();
+    }
+
+}

components/library-autoconfigure/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -0,0 +1 @@
+com.workshop.magic.config.GreetingAutoConfiguration