Scala案例类在receive方法中不匹配(在akka actor中)

我有这样的事情:

class ProbeActor extends Actor {
  case class Probe(messageKey: String)
  def receiveProbe: Receive = {
    case Probe(probeKey) => println("Good probe: "+probeKey)
    case x => println("Bad probe: "+ x)
  }
  final override def receive = receiveProbe orElse receiveOther
  def receiveOther: Receive = {
    case _ => println("Other")
  }
}

我称之为:

class Prober extends ProbeActor {
  val definite = ActorSystem("ProbeTest").actorOf(Props[ProbeActor], name = "probed")
  implicit val timeout = Timeout(5 second)
  val future = definite ? Probe("key")
}

我希望文本"Good probe: key"应该打印,但我明白了"Bad probe: Probe(key)".

注意:如果我将Probe案例类放在外面,那么它可以正常工作.

经过更多搜索,我在scala-lang.org上找到了答案:

我认为潜在的误解是关于嵌套类类型的身份.

在

A级{B级}

类A x的每个新实例都创建一个新类型xB如果你在A内部进行普通模式匹配,则指的是类型B this.B的特定实例.