Source code for the article "An Intro to Spring with Akka" (#541)

2016-07-28 21:22:08 +06:00
parent b53e46246b
commit ffcd83697a
7 changed files with 198 additions and 5 deletions
@@ -0,0 +1,26 @@
+package org.baeldung.akka;
+
+import akka.actor.ActorSystem;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+import static org.baeldung.akka.SpringExtension.SPRING_EXTENSION_PROVIDER;
+
+@Configuration
+@ComponentScan
+public class AppConfiguration {
+
+    @Autowired
+    private ApplicationContext applicationContext;
+
+    @Bean
+    public ActorSystem actorSystem() {
+        ActorSystem system = ActorSystem.create("akka-spring-demo");
+        SPRING_EXTENSION_PROVIDER.get(system).initialize(applicationContext);
+        return system;
+    }
+
+}
@@ -0,0 +1,43 @@
+package org.baeldung.akka;
+
+import akka.actor.UntypedActor;
+import org.springframework.context.annotation.Scope;
+import org.springframework.stereotype.Component;
+
+import static org.springframework.beans.factory.config.ConfigurableBeanFactory.SCOPE_PROTOTYPE;
+
+@Component
+@Scope(SCOPE_PROTOTYPE)
+public class GreetingActor extends UntypedActor {
+
+    private GreetingService greetingService;
+
+    public GreetingActor(GreetingService greetingService) {
+        this.greetingService = greetingService;
+    }
+
+    @Override
+    public void onReceive(Object message) throws Throwable {
+        if (message instanceof Greet) {
+            String name = ((Greet) message).getName();
+            getSender().tell(greetingService.greet(name), getSelf());
+        } else {
+            unhandled(message);
+        }
+    }
+
+    public static class Greet {
+
+        private String name;
+
+        public Greet(String name) {
+            this.name = name;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+    }
+
+}
@@ -0,0 +1,12 @@
+package org.baeldung.akka;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class GreetingService {
+
+    public String greet(String name) {
+        return "Hello, " + name;
+    }
+
+}
@@ -0,0 +1,28 @@
+package org.baeldung.akka;
+
+import akka.actor.Actor;
+import akka.actor.IndirectActorProducer;
+import org.springframework.context.ApplicationContext;
+
+public class SpringActorProducer implements IndirectActorProducer {
+
+    private ApplicationContext applicationContext;
+
+    private String beanActorName;
+
+    public SpringActorProducer(ApplicationContext applicationContext, String beanActorName) {
+        this.applicationContext = applicationContext;
+        this.beanActorName = beanActorName;
+    }
+
+    @Override
+    public Actor produce() {
+        return (Actor) applicationContext.getBean(beanActorName);
+    }
+
+    @Override
+    public Class<? extends Actor> actorClass() {
+        return (Class<? extends Actor>) applicationContext.getType(beanActorName);
+    }
+
+}
@@ -0,0 +1,33 @@
+package org.baeldung.akka;
+
+import akka.actor.AbstractExtensionId;
+import akka.actor.ExtendedActorSystem;
+import akka.actor.Extension;
+import akka.actor.Props;
+import org.springframework.context.ApplicationContext;
+
+public class SpringExtension extends AbstractExtensionId<SpringExtension.SpringExt> {
+
+    public static final SpringExtension SPRING_EXTENSION_PROVIDER = new SpringExtension();
+
+    @Override
+    public SpringExt createExtension(ExtendedActorSystem system) {
+        return new SpringExt();
+    }
+
+    public static class SpringExt implements Extension {
+
+        private volatile ApplicationContext applicationContext;
+
+        public void initialize(ApplicationContext applicationContext) {
+            this.applicationContext = applicationContext;
+        }
+
+        public Props props(String actorBeanName) {
+            return Props.create(SpringActorProducer.class, applicationContext, actorBeanName);
+        }
+
+    }
+
+
+}