On Fri, Mar 27, 2015 at 6:46 AM, Anton Khodakivskiy <[email protected]
> wrote:
> Hello -
>
> I have an FSM that spawns a future on one of its transitions. I pipe the
> result of the future to the FSM. The future can fail and I'd like to stop
> the FSM and report the error.
>
> class MyFsm(startFuture: => Future[T]) extends FSM[...] {
> when(a) {
> case Event(aToB, _) => goto(b)
> }
>
> onTransition {
> case a -> b => startFuture.pipeTo(self)
> }
>
> whenUnhandled {
> case Event(Status.Failure(t), _) => stop(FSM.Failure(t))
> }
> }
>
> As I understand it's best to pass the handling of the error to the
> supervising actor.
>
Then you have to throw the exception instead of stopping the FSM, and let
the supervision strategy of the parent decide to stop it.
> Now how can unit I test this actor, specitifcally the failing case?
>
Perhaps watch it, and verify that you receive Terminated. Testkit provides
watch and expectTerminated.
/Patrik
> I have the following, but I don't know how to check that the FSM is in the
> stopped state with failure.
>
> test("failing future") {
> def startFuture
> val fsm = TestFSMRef(new MyFsm(Future(throw new RuntimeException()))
> fsm ! aToB
> }
>
> Also I currently see logging error message as below. Ideally I'd like to
> handle the exception and prevent the logging error message from appearing.
>
> Thanks,
>
> Anton
>
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--
Patrik Nordwall
Typesafe <http://typesafe.com/> - Reactive apps on the JVM
Twitter: @patriknw
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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