使用 ActorSystem 直接创建  ActorSelection  应用远程actor

val clientActorSystem = ActorSystem("clientActorSystem", conf)
val url = "akka://serverActorSystem@127.0.0.1:8888/user/serverActor"
val remoteActor = clientActorSystem.actorSelection(url)

implicit val timeout: Timeout = Timeout(1, TimeUnit.SECONDS)
val future = remoteActor ? Request("ask hello")
// Future[Any] 转成 Response
future.mapTo[Response].onComplete {
  case Success(value) => println(value)
}
val future2 = remoteActor ? Request("ask akka remote")
val result = Await.result(future2, Duration.Inf)


Using ask will send a message to the receiving Actor as with tell, 
and the receiving actor must reply with sender() ! reply in order to complete the returned Future with a value.
The ask operation involves creating an internal actor for handling this reply, 
which needs to have a timeout after which it is destroyed in order not to leak resources



https://gitee.com/dyyx/hellocode/blob/master/demo/scala/akka/akka-quickstart-scala-maven/src/main/java/com/example/dyyx/remote/ClientSimple.scala


 scala akka remote 实例