fromCompletionStage

Send the single value of the CompletionStage when it completes and there is demand.

Signature

def fromCompletionStage[T](future: CompletionStage[T]): Source[T, NotUsed]

Send the single value of the CompletionStage when it completes and there is demand. If the future fails the stream is failed with that exception.

emits the future completes

completes after the future has completed

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