Updated dagger to a more complex example

vogella · vogella · commit 93057307683d · 2015-09-08T21:09:54.000+02:00
diff --git a/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/BackendService.java b/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/BackendService.java
@@ -3,12 +3,14 @@
 import javax.inject.Inject;
 
 public class BackendService {
-	private User user;
+	
+	@Inject
+	public User user;
+	
 	private String serverUrl;
 	
 	@Inject
-	public BackendService(	User user, String serverUrl) {
-		this.user = user;
+	public BackendService(String serverUrl) {
 		this.serverUrl = serverUrl;
 	}
 	
diff --git a/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/component/MyComponent.java b/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/component/MyComponent.java
@@ -12,4 +12,8 @@
 @Component(modules = { UserModule.class, BackEndServiceModule.class })
 public interface MyComponent {
 	BackendService createBackendService();
+	
+	// allow to inject into BackendService
+	// method name not important
+	void injectIntoBackendService (BackendService service);
 }
diff --git a/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/main/Main.java b/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/main/Main.java
@@ -2,12 +2,14 @@
 
 import com.vogella.java.dagger2.BackendService;
 import com.vogella.java.dagger2.component.DaggerMyComponent;
+import com.vogella.java.dagger2.component.MyComponent;
 
 public class Main {
 
 	public static void main(String[] args) {
-
-		BackendService createBackendService = DaggerMyComponent.create().createBackendService();
+		MyComponent component = DaggerMyComponent.builder().build();
+		BackendService createBackendService = component.createBackendService();
+		component.injectIntoBackendService(createBackendService);
 		boolean callServer = createBackendService.callServer();
 		if (callServer) {
 			System.out.println("Server call was successful. ");
diff --git a/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/modules/BackEndServiceModule.java b/com.vogella.java.dagger2/src/main/java/com/vogella/java/dagger2/modules/BackEndServiceModule.java
@@ -4,7 +4,6 @@
 import javax.inject.Singleton;
 
 import com.vogella.java.dagger2.BackendService;
-import com.vogella.java.dagger2.User;
 
 import dagger.Module;
 import dagger.Provides;
@@ -14,8 +13,8 @@ public class BackEndServiceModule {
     
     @Provides
     @Singleton
-    BackendService provideBackendService(User user, @Named("serverUrl") String serverUrl) {
-       return new BackendService(user, serverUrl);
+    BackendService provideBackendService(@Named("serverUrl") String serverUrl) {
+       return new BackendService(serverUrl);
     }
     
     @Provides

Original file line number	Diff line number	Diff line change
`@@ -12,4 +12,8 @@`
`12`	`12`	`@Component(modules = { UserModule.class, BackEndServiceModule.class })`
`13`	`13`	`public interface MyComponent {`
`14`	`14`	`BackendService createBackendService();`
	`15`	`+`
	`16`	`+ // allow to inject into BackendService`
	`17`	`+ // method name not important`
	`18`	`+ void injectIntoBackendService (BackendService service);`
`15`	`19`	`}`