Akka 配置Dispatcher（一）

Akka 配置Dispatcher（一）

akka默认加载classpath下application.conf配置文件，在application.conf配置文件中配置Dispatcher

如下定义一个application.conf配置文件，

akka {  loglevel = INFO}my-dispatcher {  # Dispatcher is the name of the event-based dispatcher  type = Dispatcher  # What kind of ExecutionService to use  executor = "fork-join-executor"  # Configuration for the fork join pool  fork-join-executor {    # Min number of threads to cap factor-based parallelism number to    parallelism-min = 2    # Parallelism (threads) . . . ceil(available processors * factor)    parallelism-factor = 2.0    # Max number of threads to cap factor-based parallelism number to    parallelism-max = 10  }  # Throughput defines the maximum number of messages to be  # processed per actor before the thread jumps to the next actor.  # Set to 1 for as fair as possible.  throughput = 100}

如何使用这个Dispatcher的配置？

首先定义一个Actor，如下，

package com.usoft6;import akka.actor.UntypedActor;/** * Created by liyanxin on 2015/1/12. */public class MyActor extends UntypedActor {    private int x;    private int y;    public MyActor(int x, int y) {        this.x = x;        this.y = y;    }    @Override    public void onReceive(Object message) throws Exception {        System.out.println("接收到的消息=" + message);        int result = x + y;        this.getSender().tell(result, this.getSelf());        this.getContext().stop(this.getSelf());    }}

DispatcherDemo1.java

package com.usoft6;import akka.actor.ActorRef;import akka.actor.ActorSystem;import akka.actor.Props;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 2015/1/13. */public class DispatcherDemo1 {    public static void main(String args[]) throws Exception {        ActorSystem system = ActorSystem.create("myActorSystem");        ActorRef myActor = system.actorOf(Props.create(MyActor.class, 54, 65).                withDispatcher("my-dispatcher"), "myactor");        Timeout timeout = new Timeout(Duration.create(5, "seconds"));        Future<Object> future = Patterns.ask(myActor, "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。        Integer result = (Integer) Await.result(future, timeout.duration());        System.out.println(result);    }}这块代码指定Dispatcher的配置， ActorRef myActor = system.actorOf(Props.create(MyActor.class, 54, 65).                withDispatcher("my-dispatcher"), "myactor");

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