That sounds incredibly strange. Please create an issue with a reproducer
that we can run.
/Patrik
ons 31 okt. 2018 kl. 23:04 skrev <danel.kotev.w...@gmail.com>:
> have a flow with mapAsync stage. This stage should emits its elements in
> the same order they were pushed. I verified (using log printing) that
> events are pushed by the desired order. However, my mapAsync stage
> doesn't always pushed this elements in the desired order. I think the the
> function I used caused this issue, but
>
> MyFlow (the issue is at the second mapAsync):
>
> Flow[EventFlowInfo]
> .mapAsync[EventOrError](EventVerificationParallelism) { eventFlowInfo:
> EventFlowInfo =>
> // toDo: add verification rules
> Future(Right(eventFlowInfo))
> }
> .mapAsync[EventOrError](5) { eventOrError =>
> runStage("event storage", eventOrError, persistToEventStorage)
> }
>
> runStage method:
>
> private def runStage(stageName: String,
> eventFlowInfoEither: EventOrError,
> stage: (EventFlowInfo) => Future[EventOrError]):
> Future[EventOrError] = {
> eventFlowInfoEither match {
> case Right(eventFlowInfo: EventFlowInfo) =>
> logger.info(s"running stage for $eventFlowInfo")
> stage(eventFlowInfo)
> case error@Left(_) =>
> logger.error(s"failed event will not be persisted to $stageName")
> Future(error)
> }
> }
>
> persistToEventStorage method:
>
> private[flow] def persistToEventStorage(eventFlowInfo: EventFlowInfo):
> Future[EventOrError] = {
> eventFlowInfo.event match {
> case Some(event: Event) =>
> logger.info(s"persisting event of doc [${event.docId}] from sender
> [${eventFlowInfo.sender}] to event storage")
> create(Event.toEventRow(event))
> .map[EventOrError]{ eventId =>
> logger.info(s"event for doc [${event.docId}] from sender
> [${eventFlowInfo.sender}] was created successfully with id [$eventId]")
> val updatedEvent: Event = event.copy(id = eventId)
> Right(eventFlowInfo.copy(event = Some(updatedEvent)))
> }
> .recover { case ex: Throwable =>
> logger.error(s"was not able to persist event for doc
> [${event.docId}] from sender [${eventFlowInfo.sender}]", ex)
> Left(EventStorageException(ex, eventFlowInfo))
> }
> case None => }
>
> case None =>
> Future.successful(Right(eventFlowInfo))
> }
> }
>
> It's important to say that I verified that there is no issue with the
> method create, however i do think that something is wrong in
> persistToEventStorage method. I'm using the same ExecutionContext.
>
> Scala version "2.12.7"
>
> Akka version "2.5.17"
>
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