AKKA Inbox收件箱

起因

得到ActorRef就可以给actor发送消息，但无法接收多回复，也不知道actor是否停止

Inbox收件箱出现就是解决这两个问题

示例

package akka.demo.actor

import akka.actor.*
import java.time.Duration

/**
 ** created by tankx
 ** 2019/9/12 与actor 通信模式ask或tell 无法支持接收多回复和观察其它actor的生命周期，所以inbox应用而生
 **/
fun main() {

  val system = ActorSystem.create("box-sys")

  val helloActor = system.actorOf(HelloActor.props("tom"))
  helloActor.tell("hi", ActorRef.noSender())

  val box = Inbox.create(system)
  box.send(helloActor, "how are you!")

  box.watch(helloActor)//监控actor 的生命周期，当actor stop， receive会接收到Terminated消息

  helloActor.tell(PoisonPill.getInstance(), ActorRef.noSender());//毒死actor

  while (true) {
    try {

      val receiveObj = box.receive(Duration.ofSeconds(2))//可一直接收actor回的消息
      println("box receive:" + receiveObj)

      if (receiveObj is Terminated) {
        break
      }
    } catch (e: Exception) {
      println(e.message)
    }
  }

  Thread.sleep(2000)
  System.exit(1)

}