flatMapMerge

Transform each input element into a Source whose elements are then flattened into the output stream through merging.

Nesting and flattening stages

Signature

def flatMapMerge[T, M](breadth: Int, f: Out ⇒ Graph[SourceShape[T], M]): Repr[T]

Description

Transform each input element into a Source whose elements are then flattened into the output stream through merging. The maximum number of merged sources has to be specified.

emits when one of the currently consumed substreams has an element available

backpressures when downstream backpressures

completes when upstream completes and all consumed substreams complete

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