Question

我正在尝试使用Supervision stategy进行恢复，当我使用map编写Flow阶段时它会起作用，但是如果我使用的是graph阶段，则它永远不会被捕获，并且整个管道都会失败

    object  test extends App{

      val stageSupervisionDecider: Supervision.Decider = {
        case cEx: IllegalArgumentException =>
          println("Supervision Catch")
          Supervision.Resume
        case _ => Supervision.Stop
      }

      implicit val system = ActorSystem("system")

      implicit val materializer = ActorMaterializer(
        ActorMaterializerSettings(system)
          .withSupervisionStrategy(stageSupervisionDecider)
      )

      Source(Vector(1,2,3,4,5,6,7))
        .via(new FailFlow)
        .runWith(Sink.foreach(println))
    }


    class FailFlow extends GraphStage[FlowShape[Int, Int]] {

      val in = Inlet[Int]("FailFlow.In")
      val out = Outlet[Int]("FailFlow.Out")

      override def shape: FlowShape[Int, Int] = FlowShape.of(in, out)

      override def createLogic(inheritedAttributes: Attributes): GraphStageLogic = {
        new GraphStageLogic(shape) {
          setHandler(in, new InHandler {
            override def onPush(): Unit = {
              val m = grab(in)
              if(m % 2 == 0)
                throw new IllegalArgumentException("illegal value")
              else
              push(out,m)
            }
          })

          setHandler(out, new OutHandler {
            override def onPull(): Unit = {
                pull(in)
            }
          })
        }
      }
    }

任何想法在这里发生了什么错误？

Answer 1

根据documentation（大红框）：

ZipWith，GraphStage联结，ActorPublisher源和ActorSubscriber接收器组件不遵守监督策略属性

使用GraphStage的监督策略不起作用

1 个答案: