Sink.preMaterialize

Materializes this Sink, immediately returning (1) its materialized value, and (2) a new Sink that can be consume elements ‘into’ the pre-materialized one.

Sink stages

Signature

def preMaterialize()(implicit materializer: Materializer): (Mat, Sink[In, NotUsed])

Description

Materializes this Sink, immediately returning (1) its materialized value, and (2) a new Sink that can be consume elements ‘into’ the pre-materialized one. Useful for when you need a materialized value of a Sink when handing it out to someone to materialize it for you.

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