如何在Scala中正确使用Akka演员 [英] How to properly use akka actors in scala

问题描述

我对演员的想法比较陌生，想知道我是否可以对自己的工作提出一些批评。对于项目的一部分，我需要有一个演员来告诉听众的演员时间。侦听演员必须能够添加到该演员中。

I'm relatively new to the idea of actors, and was wondering if I could get some critique on what I am doing. For part of a project, I need to have an actor that tells a collection of listening actors the time. The listening actors must be able to be added to this actor.

当前我有这个：

import akka.actor.Actor;

import akka.actor.ActorRef;
import com.github.nscala_time.time.Imports._;

class TimeManager extends Actor {
  var actors:List[ActorRef] = List();
  def receive = {
    case AdvanceTime() => actors foreach (_ ! DateTime.now)
    case AddListener(x) => actors =  x :: actors
  }
}

有什么办法我可以从此代码中删除状态（变量参与者）以使其更具功能性吗？

Is there any way that I can remove the state (var actors) from this code to make it more functional?

推荐答案

您无法删除状态，因为 TimeManager 应包含以下内容的列表：演员。

You can't remove state since TimeManager should contain list of actors.

您可以隐藏它：

class TimeManager extends Actor {
  def receive = getBehavior(Nil)
  def getBehavior(actors: List[ActorRef]): Receive = {
    case AdvanceTime() => actors foreach (_ ! DateTime.now)
    case AddListener(x) => context become getBehavior(x :: actors)
  }
}

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