捕捉异常作为Akka演员的回应

时间:2016-06-13 17:43:44

标签: scala akka

以下函数调用一个actor:

def read ()  = {

  val system = ActorSystem(Constant.actorSystem)
  val manageData = system.actorOf(Props[ManageData], name = "theactor")

  val num = -1
  implicit val timeout = Timeout(60 seconds)
  val future = manageData ? num
  val result = Await.result(future, timeout.duration)
}

manageData内,子进程抛出异常:

throw new Exception("Negative number")

如何在read()中抓住它?

1 个答案:

答案 0 :(得分:0)

这是一个老问题,但是我不得不处理它。

如果异常是我不期待的,我通常会在演员主管上对待它:

override val supervisorStrategy =
  OneForOneStrategy(maxNrOfRetries = 10, withinTimeRange = 1 minute) {
    case _: ArithmeticException      => {
      log.error("\n# ArithmeticException -> Resume\n")
      Resume
    }
    // other exceptions
  }
}

对于其他类型的错误,我倾向于回复错误并在以下情况下处理:

case class IError(code:Int, msg:Option[String] = None)

sender ! IError(401, msg= Some("Unauthorized"))