Hi Jakub,
> Source(List(0,1,2)).map { i =>
> if (i != 2)
> Source(List(0))
> else
> Source(throwable)
> }.flatten(FlattenStrategy.concat).runForeach(println)
>
>
> 0
> 0
>
>
> But this one doesn't yield anything, as if the condition was (i != 0). Is
> there a way to solve it?
>
Streams are fail-fast and propagate onError as soon as possible and as fast
as possible (i.e. as soon as concat finds a failed stream it fails
everything). If this is not desirable you can protect yourself from failed
stream by converting the failure to completion, or to a marker element (for
example you use Try[T] instead of T). This can be done with custom stages.
-Endre
>
> Source(List(0,1,2)).map { i =>
> if (i != 1)
> Source(List(0))
> else
> Source(throwable)
> }.flatten(FlattenStrategy.concat).runForeach(println)
>
>
> --
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> >>>>>>>>>> Check the FAQ:
> http://doc.akka.io/docs/akka/current/additional/faq.html
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--
>>>>>>>>>> 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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