akka入门-调用子Actor处理消息

程序演示了父子结构的Actor处理消息。父Actor接收到消息后调用子Actor处理。

1.创建父子Actor

import java.util.UUID;import com.center.akka.simple.command.Command;import com.center.akka.simple.event.Event;import akka.actor.ActorRef;import akka.actor.Props;import akka.actor.UntypedActor;import akka.event.Logging;import akka.event.LoggingAdapter;public class ParentActor extends UntypedActor {     LoggingAdapter log = Logging.getLogger(getContext().system(), this);     private final ActorRef childActor ;     public ParentActor() {           childActor = getContext().actorOf(Props.create(ChildActor. class), "child-actor");     }     @Override     public void onReceive(Object msg ) throws Exception {           log.info( "Received Command: " + msg );           if (msg instanceof Command) {               final String data = ((Command) msg).getData();               final Event event = new Event(data, UUID.randomUUID().toString());               childActor.tell(event , getSelf());          } else if (msg .equals("echo" )) {               log.info( "ECHO!");          }     }}import akka.actor.UntypedActor;import akka.event.Logging;import akka.event.LoggingAdapter;public class ChildActor extends UntypedActor {    LoggingAdapter log = Logging.getLogger(getContext().system(), this);    @Override    public void preStart() {        log.info( "Starting");    }    @Override    public void onReceive(Object msg ) {        log.info( "Received Event: " + msg );    }}

2.测试类

import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.center.akka.parent_child.actor.ParentActor;import com.center.akka.simple.command.Command;import akka.actor.ActorRef;import akka.actor.ActorSystem;import akka.actor.Props;public class System {     public static final Logger log = LoggerFactory.getLogger(System.class);     public static void main(String... args) throws Exception {           final ActorSystem actorSystem = ActorSystem.create("actor-system");          Thread. sleep(5000);           final ActorRef actorRef = actorSystem.actorOf(Props.create(ParentActor. class), "parent-actor");           actorRef.tell( new Command("CMD 1" ), null);           actorRef.tell( new Command("CMD 2" ), null);           actorRef.tell( new Command("CMD 3" ), null);           actorRef.tell( "echo", null );           actorRef.tell( new Command("CMD 4" ), null);           actorRef.tell( new Command("CMD 5" ), null);          Thread. sleep(5000);           log.debug("Actor System Shutdown Starting..." );           actorSystem.shutdown();     }}

3.结果输出

[INFO] [05/17/2015 17:52:05.981] [actor-system-akka.actor.default-dispatcher-4] [akka://actor-system/user/parent-actor/child-actor] Starting[INFO] [05/17/2015 17:52:05.981] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] Received Command: Command{data='CMD 1'}[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] Received Command: Command{data='CMD 2'}[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-2] [akka://actor-system/user/parent-actor/child-actor] Received Event: Event{data='CMD 1', uuid='3423af06-f96c-430b-ad3a-6d16d86b3d91'}[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] Received Command: Command{data='CMD 3'}[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-2] [akka://actor-system/user/parent-actor/child-actor] Received Event: Event{data='CMD 2', uuid='93061123-91ef-445f-8f99-29b558d84947'}[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] Received Command: echo[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-2] [akka://actor-system/user/parent-actor/child-actor] Received Event: Event{data='CMD 3', uuid='35203fc0-f1cc-4d8c-bab2-75e77f515c03'}[INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] ECHO![INFO] [05/17/2015 17:52:06.035] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] Received Command: Command{data='CMD 4'}[INFO] [05/17/2015 17:52:06.036] [actor-system-akka.actor.default-dispatcher-3] [akka://actor-system/user/parent-actor] Received Command: Command{data='CMD 5'}[INFO] [05/17/2015 17:52:06.036] [actor-system-akka.actor.default-dispatcher-2] [akka://actor-system/user/parent-actor/child-actor] Received Event: Event{data='CMD 4', uuid='5df543a6-7290-43f6-ad85-74ea341e999b'}[INFO] [05/17/2015 17:52:06.036] [actor-system-akka.actor.default-dispatcher-2] [akka://actor-system/user/parent-actor/child-actor] Received Event: Event{data='CMD 5', uuid='da49b323-59ba-49c5-96d5-707cbe5a4b9b'}17:52:10.981 [main] DEBUG c.c.akka.parent_child.app.System - Actor System Shutdown Starting...