adding factory instance example (eugenp#1552)

AbhinabKanrar · maibin · commit 15a4a230995f · 2017-04-01T21:47:23.000+02:00
* rest with spark java * 4 * Update Application.java * indentation changes * spring @RequestMapping shortcuts * removing spring requestmapping and pushing spring-mvc-java * Joining/Splitting Strings with Java and Stream API * adding more join/split functionality * changing package name * testcase change * adding webutils * adding testcase for WebUtils and ServletRequestUtils * adding testcase * spring-security-stormpath * adding ratpack module * adding pom.xml * adding following modules with updated testcase : DB, Filter, Json * adding spring-boot custom banner tutorial * changing banner format in plain text * Delete banner.txt~ * Delete b.txt~ * CORS in JAX-RS * ratpack with google guice * adding factory instance example
diff --git a/ratpack/src/main/java/com/baeldung/guice/Application.java b/ratpack/src/main/java/com/baeldung/guice/Application.java
@@ -2,6 +2,7 @@
 
 import com.baeldung.guice.config.DependencyModule;
 import com.baeldung.guice.service.DataPumpService;
+import com.baeldung.guice.service.ServiceFactory;
 import com.baeldung.guice.service.impl.DataPumpServiceImpl;
 
 import ratpack.guice.Guice;
@@ -15,17 +16,17 @@ public static void main(String[] args) throws Exception {
 				.start(server -> server.registry(Guice.registry(bindings -> bindings.module(DependencyModule.class)))
 						.handlers(chain -> chain.get("randomString", ctx -> {
 							DataPumpService dataPumpService = ctx.get(DataPumpService.class);
-							ctx.render(dataPumpService.generate().length());
-						})));
+							ctx.render(dataPumpService.generate());
+						}).get("factory", ctx -> ctx.render(ServiceFactory.getInstance().generate()))));
 
 //		RatpackServer.start(server -> server
 //				.registry(Guice
 //						.registry(bindings -> bindings.bindInstance(DataPumpService.class, new DataPumpServiceImpl())))
 //				.handlers(chain -> chain.get("randomString", ctx -> {
 //					DataPumpService dataPumpService = ctx.get(DataPumpService.class);
 //					ctx.render(dataPumpService.generate());
-//				})));
+//				}).get("factory", ctx -> ctx.render(ServiceFactory.getInstance().generate()))));
 
 	}
 
-}
+}
diff --git a/ratpack/src/main/java/com/baeldung/guice/service/DataPumpService.java b/ratpack/src/main/java/com/baeldung/guice/service/DataPumpService.java
@@ -1,9 +1,5 @@
 package com.baeldung.guice.service;
 
-import com.baeldung.guice.service.impl.DataPumpServiceImpl;
-import com.google.inject.ImplementedBy;
-
-@ImplementedBy(DataPumpServiceImpl.class)
 public interface DataPumpService {
 
 	String generate();
diff --git a/ratpack/src/main/java/com/baeldung/guice/service/ServiceFactory.java b/ratpack/src/main/java/com/baeldung/guice/service/ServiceFactory.java
@@ -0,0 +1,20 @@
+package com.baeldung.guice.service;
+
+import com.baeldung.guice.service.impl.DataPumpServiceImpl;
+
+public class ServiceFactory {
+
+	private static DataPumpService instance;
+
+	public static void setInstance(DataPumpService dataPumpService) {
+		instance = dataPumpService;
+	}
+
+	public static DataPumpService getInstance() {
+		if (instance == null) {
+			return new DataPumpServiceImpl();
+		}
+		return instance;
+	}
+
+}
