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akka.stream.scaladsl

CoupledTerminationFlow

object CoupledTerminationFlow

Allows coupling termination (cancellation, completion, erroring) of Sinks and Sources while creating a Flow from them. Similar to Flow.fromSinkAndSource however that API does not connect the completion signals of the wrapped operators.

Source
CoupledTerminationFlow.scala
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    (Since version ) see corresponding Javadoc for more information.

  2. def fromSinkAndSource[I, O, M1, M2](in: Sink[I, M1], out: Source[O, M2]): Flow[I, O, (M1, M2)]

    Similar to Flow.fromSinkAndSource however couples the termination of these two operators.

    Similar to Flow.fromSinkAndSource however couples the termination of these two operators.

    E.g. if the emitted Flow gets a cancellation, the Source of course is cancelled, however the Sink will also be completed. The table below illustrates the effects in detail:

    Returned Flow Sink (in) Source (out)
    cause: upstream (sink-side) receives completion effect: receives completion effect: receives cancel
    cause: upstream (sink-side) receives error effect: receives error effect: receives cancel
    cause: downstream (source-side) receives cancel effect: completes effect: receives cancel
    effect: cancels upstream, completes downstream effect: completes cause: signals complete
    effect: cancels upstream, errors downstream effect: receives error cause: signals error or throws
    effect: cancels upstream, completes downstream cause: cancels effect: receives cancel

    The order in which the in and out sides receive their respective completion signals is not defined, do not rely on its ordering.

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    @deprecated
    Deprecated

    (Since version 2.5.2) Use Flow.fromSinkAndSourceCoupledMat(..., ...)(Keep.both) instead

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