akka系列文章目錄

注意：新版本的akka需要使用jdk8

裡面有兩個Actor：

package sample.hello;

import akka.actor.Props;
import akka.actor.UntypedActor;
import akka.actor.ActorRef;

public class HelloWorld extends UntypedActor {

  @Override
  public void preStart() {
    // create the greeter actor
    final ActorRef greeter = getContext().actorOf(Props.create(Greeter.class), "greeter"
 
);
    // tell it to perform the greeting
    greeter.tell(Greeter.Msg.GREET, getSelf());
  }

  @Override
  public void onReceive(Object msg) {
    if (msg == Greeter.Msg.DONE) {
      // when the greeter is done, stop this actor and with it the application
      getContext().stop(getSelf());
    } else
 

      unhandled(msg);
  }
}

package sample.hello;

import akka.actor.UntypedActor;

public class Greeter extends UntypedActor {

  public static enum Msg {
    GREET, DONE;
  }

  @Override
  public void onReceive(Object msg) throws InterruptedException {
    if (msg == Msg.GREET) {
      System.out.println("Hello World!"
 
);
      Thread.sleep(1000);
      getSender().tell(Msg.DONE, getSelf());
    } else
      unhandled(msg);
  }

}

main方法

package sample.hello;

public class Main {

  public static void main(String[] args) {
    akka.Main.main(new String[] { HelloWorld.class.getName() });
  }
}

另一種main寫法，通過建立actor的方式

 public static void main(String[] args) {
    ActorSystem system = ActorSystem.create("Hello");
    ActorRef a = system.actorOf(Props.create(HelloWorld.class), "helloWorld");
    System.out.println(a.path());
  }

helloWord示例比較簡單，不過多解釋

參考資料

• 書籍《java高併發程式設計》