Akka Actor_Future的使用
常见的是通过Actor的tell方法给另外一个actor发送消息，但是actor 和 future怎么交互，发送消息，如下，
Future<Object> future = Patterns.ask(a, "are you ready?", timeout);做了一个Future 和 Actor 结合使用的例子，如下，
package com.usoft;
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
import akka.actor.UntypedActor;
import akka.event.Logging;
import akka.event.LoggingAdapter;
import akka.pattern.Patterns;
import akka.util.Timeout;
import scala.concurrent.Await;
import scala.concurrent.Future;
import scala.concurrent.duration.Duration;
/**
* Created by liyanxin on 2015/1/8.
*/
public class HelloFuture {
public static class A extends UntypedActor {
private final LoggingAdapter log = Logging.getLogger(getContext().system(), this);
@Override
public void onReceive(Object message) throws Exception {
if (message instanceof String) {
Thread.sleep(3000);
System.out.println(Thread.currentThread().getName() + " sleep end");
System.out.println("接收的消息：" + message);
// 返回一个消息
this.getSender().tell("hello world", this.getSelf());
System.out.println("sender path=" + this.getSender().path());
getContext().stop(this.getSelf());
log.info("|||{} has stop", this.getSelf().path());
}
}
}
public static void main(String args[]) throws Exception {
System.out.println(Thread.currentThread().getName());
ActorSystem system = ActorSystem.create("mySystem");
ActorRef a = system.actorOf(Props.create(A.class), "helloWorld");
Timeout timeout = new Timeout(Duration.create(5, "seconds"));
Future<Object> future = Patterns.ask(a, "are you ready?", timeout);
// This will cause the current thread to block and wait for the UntypedActor to ‘complete’
// the Future with it’s reply.
// 在这里会阻塞到 Await.result 方法上，但这会导致性能的损失。
String result = (String) Await.result(future, timeout.duration());
System.out.println(result);
}
}运行结果，
main
mySystem-akka.actor.default-dispatcher-4 sleep end
接收的消息：are you ready?
hello world
sender path=akka://mySystem/temp/$a
[INFO] [01/08/2015 16:55:11.267] [mySystem-akka.actor.default-dispatcher-4] [akka://mySystem/user/helloWorld] |||akka://mySystem/user/helloWorld has stop
Maven依赖库
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-actor_2.11</artifactId>
<version>2.3.8</version>
</dependency>结果是出来了，但是代码是如何工作的，这些细节还是不清楚的。
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来源：oschina
链接：https://my.oschina.net/u/1469576/blog/365191