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Introducing watching for completion earlier

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So we can terminate the ActorSystem
This commit is contained in:
Arnout Engelen 2017-04-06 11:17:10 +02:00
parent 952fa34c70
commit 18eee18b8c
5 changed files with 71 additions and 36 deletions
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10
akka-docs/rst/scala/stream/stream-quickstart.rst
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@ -15,6 +15,10 @@ If you want to execute the code samples while you read through the quick start g
.. includecode:: ../code/docs/stream/QuickStartDocSpec.scala#other-imports
And an object to hold your code, for example:
.. includecode:: ../code/docs/stream/QuickStartDocSpec.scala#main-app
Now we will start with a rather simple source, emitting the integers 1 to 100:
.. includecode:: ../code/docs/stream/QuickStartDocSpec.scala#create-source
@ -38,6 +42,12 @@ setup to an Actor that runs it. This activation is signaled by having “run”
part of the method name; there are other methods that run Akka Streams, and
they all follow this pattern.
When running this source in a :class:`scala.App` you might notice it does not
terminate, because the :class:`ActorSystem` is never terminated. Luckily
``runForeach`` returns a :class:`Future[Done]` which resolves when the stream finishes:
.. includecode:: ../code/docs/stream/QuickStartDocSpec.scala#run-source-and-terminate
You may wonder where the Actor gets created that runs the stream, and you are
probably also asking yourself what this ``materializer`` means. In order to get
this value we first need to create an Actor system: