colossus.streaming

Multiplexing

object Multiplexing

Multiplexing is the process of combining multiple independant streams into a single stream. Each message in the multiplexed stream carries information about which sub-stream it originated from, so that eventually the stream can be demultiplexed back into the constituent sub-streams.

By multiplexing a "base" Sink[T], a new Sink[SubSource[K,T]] is created, with each SubSource containing a Source[T]. When a Source is pushed into the multiplexing sink, all messages pushed to that source are routed into the base sink.

Likewise, demultiplexing a multiplexed Source[T] will create a Source[SubSource[K,T]], with each Subsource being one of the sub-streams being fed into the multiplexed source.

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  8. def demultiplex[K, T](base: Source[T], sourcesBufferSize: Int = 10, substreamBufferSize: Int = 10)(implicit ms: MultiStream[K, T]): Source[SubSource[K, T]]

    Demultiplex a multiplexed stream into individual sub-streams.

    Demultiplex a multiplexed stream into individual sub-streams. An implicit Multistream is required in order to determine the proper substream of each message in the multiplexed stream.

    base

    The multiplexed source

    sourcesBufferSize

    the internal buffer size of the stream of sources

    substreamBufferSize

    the internal buffer size of each newly created substream

    returns

    A Source of substreams

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  15. def multiplex[K, T](base: Sink[T])(implicit ms: MultiStream[K, T]): Sink[SubSource[K, T]]

    Multiplex a base Sink into a multiplexed Sink[SubSource[K,T]].

    Multiplex a base Sink into a multiplexed Sink[SubSource[K,T]]. See the docs on Multiplexing for more details.

    base

    The sink to multiplex

    returns

    A multiplexing Sink that can accept new sources to route into the base sink

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