在Scala中播放2.2.2-WebSocket/相当于in.onClose（）的内容

我对Scala使用Play 2.2.2。 我的控制器中有以下代码：

    def wsTest = WebSocket.using[JsValue] {
        implicit request =>
          val (out, channel) = Concurrent.broadcast[JsValue]
          val in = Iteratee.foreach[JsValue] {
            msg => println(msg)
          }
          userAuthenticatorRequest.tracked match { //detecting wheter the user is authenticated
            case Some(u) =>
              mySubscriber.start(u.id, channel)
            case _ =>
              channel push Json.toJson("{error: Sorry, you aren't authenticated yet}")
          }
          (in, out)
      }

调用此代码：

object MySubscriber {

  def start(userId: String, channel: Concurrent.Channel[JsValue]) {
    ctx.getBean(classOf[ActorSystem]).actorOf(Props(classOf[MySubscriber], Seq("comment"), channel), name = "mySubscriber") ! "start"
    //a simple refresh would involve a duplication of this actor!
  }

}

class MySubscriber(redisChannels: Seq[String], channel: Concurrent.Channel[JsValue]) extends RedisSubscriberActor(new InetSocketAddress("localhost", 6379), redisChannels, Nil) with ActorLogging {

  def onMessage(message: Message) {
    println(s"message received: $message")
    channel.push(Json.parse(message.data))
  }

  override def onPMessage(pmessage: PMessage) {
    //not used
    println(s"message received: $pmessage")
  }
}

问题是，当用户刷新页面时，一个新的websocket会重新启动，涉及名为

mySubscriber

的参与者的复制

我注意到该剧的Java版本有一种检测关闭连接的方法，可以关闭一个演员。 例如：

---

如何使用Scala WebSocket API处理同样的事情？每次关闭套接字时，我都要关闭actor。

正如@Mik378所建议的，

Iteratee.map

充当

onClose

的角色

val in = Iteratee.foreach[JsValue] {
  msg => println(msg)
} map { _ =>
  println("Connection has closed")
}

---

听起来像是

Iteratee.map

（

mapDone

在2.2.2中被弃用）在WebSocket中充当inClose，但任何确认都很酷：）谢谢您的确认；）

val in = Iteratee.foreach[JsValue] {
  msg => println(msg)
} map { _ =>
  println("Connection has closed")
}