Question

我正在开发一个简单的项目，它可以启动PhantomJS进程并通过WebSockets与之通信。我在我的控制器中宣布了经理演员和ws动作：

class Application @Inject()(implicit actorSystem: ActorSystem, materializer: Materializer) extends Controller {

val manager = actorSystem.actorOf(Manager.props, "manager")

def index = Action {
   Ok(views.html.main())
}

def socket = WebSocket.accept[String, String] { request =>
    ActorFlow.actorRef(out => WebSocketAccepter.props(out, manager))
}

def start = Action {
    manager ! "START"
    Ok
}

Manager actor只是启动PhantomJS，它连接到WS。

一切正常，我从PhantomJS得到了开场白的消息，但接下来我想从经理那里获取一些信息并将其归还给PhantomJS：

class WebSocketAccepter(out: ActorRef, manager: ActorRef) extends Actor with ActorLogging {
    ...
    def receive = {
        case message: String => {
          val json = Json.parse(message)
          val messageType: String = (json \ "type").as[String]

         messageType match {
         case "OPEN" => {
           (manager ? AskInfo).mapTo[RegInfo].map(info => {
              out ! Json.toJson(info).toString()
           })
         }
    ...
}

我将经理演员作为参数传递，但当我询问信息时说：

a.a.RepointableActorRef - Message [models.AskInfo$] from Actor[akka://application/temp/$a]
to Actor[akka://application/user/manager#-1822927709] was not delivered.    
[1] dead letters encountered.

这有点奇怪，websocket演员走在临时路径下。有什么问题？

Answer 1

通过从ManagerActor向特殊子actor

中取出启动流程代码解决了这个问题

来自WebsocketAccepter演员的消息与Play 2.5一起进入了死信

1 个答案: