无法使用Akka Java API的UnTypedActorFactory创建演员

问题描述

我试图用未类型化的actor工厂创建一个actor，编译进行得很好。但是在运行应用程序时，出现以下错误。我是否在配置中缺少任何内容？

I am trying to create an actor with untyped actor factory, compilation happens fine. But while running the application, I get the following error. Am I missing anything in configuration?

Java代码：

MyActor myactor = new MyActor();  //MyActor extends UnTypedActor
ActorSystem system = ActorSystem.create("mynamespace");
ActorRef actor = system.actorOf(new Props(new UntypedActorFactory() {
      public UntypedActor create() {
          return myactor;
      }
  }));

运行时错误：

推荐答案

这是因为您要在 ActorSystem 之外创建 MyActor 的实例。在工厂内部创建Actor（这就是;-)的意思）。

That's because you are creating the instance of MyActor outside the ActorSystem. Create the Actor inside of your factory (that's what it is for ;-) ) and it should be fine.

ActorSystem system = ActorSystem.create("mynamespace");
ActorRef actor = system.actorOf(new Props(new UntypedActorFactory() {
  public UntypedActor create() {
    return new MyActor();
  }
}));

在这种情况下，您甚至不需要工厂，因为您有默认的构造函数。只需将类作为参数传递给 Props ：

In this case you don't even need a factory, because you have a default constructor. Just pass the class as parameter to the Props:

system.actorOf(new Props(MyActor.class));

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