我是akka的新手,有点卡住了。任何帮助,不胜感激。

在akka 2.1.4文档http://doc.akka.io/docs/akka/2.1.4/java/routing.html中,提供了示例自定义路由器代码,其中自定义路由逻辑将根据实例路由消息。

return new CustomRoute() {
    @Override
    public Iterable<Destination> destinationsFor(ActorRef sender, Object msg) {
      switch ((Message) msg) {
      case DemocratVote:
      case DemocratCountResult:
        return Arrays.asList(
          new Destination[] { new Destination(sender, democratActor) });
      case RepublicanVote:
      case RepublicanCountResult:
        return Arrays.asList(
          new Destination[] { new Destination(sender, republicanActor) });
      default:
        throw new IllegalArgumentException("Unknown message: " + msg);
      }
    }
};


我正在尝试使用akka 2.3.11路由器API的http://doc.akka.io/docs/akka/2.3.11/java/routing.html实现类似的逻辑,但是无法理解以下代码段。

@Override
public Routee select(Object message, IndexedSeq<Routee> routees) {
    List<Routee> targets = new ArrayList<Routee>();
    for (int i = 0; i < nbrCopies; i++) {
      targets.add(roundRobin.select(message, routees));
    }
    return new SeveralRoutees(targets);
}


无法获得路线和演员的关系。我如何将路由与消息实例相关联?

最佳答案

您无需HAVE TO(请参见发送方法注释)从提供的列表中选择目标路由。您可以有以下内容:

Routee democratRoutee = new ActorRefRoutee(democratActorRef);
Routee republicanRoutee = new ActorRefRoutee(republicanActorRef);

@Override
public Routee select(Object message, IndexedSeq<Routee> routees) {
  switch ((Message) msg) {
    case DemocratVote: return new NoRoutee();
    case DemocratCountResult:
      democratRoutee;
    case RepublicanVote: return new NoRoutee();
    case RepublicanCountResult:
      return republicanRoutee;
    default:
      throw new IllegalArgumentException("Unknown message: " + msg);
  }
}


//注意:我不知道Java中NoRoutee实例getter的确切语法,因此可能有所不同。

关于java - 如何使用Akka 2.3.11在Java中创建自定义路由器?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/31878832/

10-15 08:39