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Merge pull request #16961 from drewhk/wip-java-materialized-values-section-drewhk

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+doc: Added materialized value handling section for Java
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drewhk 2015-02-27 15:56:38 +01:00
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akka-docs-dev/rst/java/stream-flows-and-basics.rst
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@ -196,6 +196,16 @@ which will be running on the thread pools they have been configured to run on -
Reusing *instances* of linear computation stages (Source, Sink, Flow) inside FlowGraphs is legal,
yet will materialize that stage multiple times.
Combining materialized values
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Since every processing stage in Akka Streams can provide a materialized value after being materialized, it is necessary
to somehow express how these values should be composed to a final value when we plug these stages together. For this,
many combinator methods have variants that take an additional argument, a function, that will be used to combine the
resulting values. Some examples of using these combiners are illustrated in the example below.
.. includecode:: ../../../akka-samples/akka-docs-java-lambda/src/test/java/docs/stream/FlowDocSpec.scala#flow-mat-combine
Stream ordering
===============