Akka:如何在重启时获取儿童演员

import akka.actor.{Actor, ActorRef, ActorSystem, Props}

class ParentActor extends Actor {
  var childActor: ActorRef = _

  override def preStart(): Unit = {
    childActor = context.actorOf(Props[ChildActor], "childActor")
  }

  override def preRestart(reason: Throwable, message: Option[Any]): Unit = {
    childActor = context.actorOf(Props[ChildActor], "childActor")
  }

  override def receive: Receive = {
    case msg =>
      childActor ! msg
  }
}

class ChildActor extends Actor {
  override def receive: Receive = {
    case msg =>
      // 处理消息
  }
}

val system = ActorSystem("MySystem")
val parentActor = system.actorOf(Props[ParentActor], "parentActor")

// 发送消息给父Actor
parentActor ! "Hello"

// 当子Actor发生异常并被重启后，可以继续使用新创建的子Actor
parentActor ! "World"