lazyInitAsync is deprecated, please use lazyFutureSink instead.
Creates a real
Sink upon receiving the first element. Internal
Sink will not be created if there are no elements, because of completion or error.
- If upstream completes before an element was received then the
CompletionStageis completed with
- If upstream fails before an element was received,
sinkFactorythrows an exception, or materialization of the internal sink fails then the
CompletionStageis completed with the exception.
- Otherwise the
CompletionStageis completed with the materialized value of the internal sink.
Reactive Streams semantics
backpressures when initialized and when created sink backpressures