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!str - 18808 - Removes Sink.fanoutPublisher and makes Sink.publisher specify number of subscribers

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Sink.publisher now takes a max number of Subscribers and
the elasticity between concurrent Subscribers.
This commit is contained in:
Viktor Klang 2015-10-30 16:00:44 +01:00
parent 33444c572b
commit f839a1f85d
54 changed files with 246 additions and 238 deletions
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6
akka-docs-dev/rst/scala/code/docs/stream/ReactiveStreamsDocSpec.scala
View file

@ -41,7 +41,7 @@ class ReactiveStreamsDocSpec extends AkkaSpec {
val impl = new Fixture {
override def tweets: Publisher[Tweet] =
TwitterStreamQuickstartDocSpec.tweets.runWith(Sink.publisher)
TwitterStreamQuickstartDocSpec.tweets.runWith(Sink.publisher(1))
override def storage = TestSubscriber.manualProbe[Author]
@ -92,7 +92,7 @@ class ReactiveStreamsDocSpec extends AkkaSpec {
//#source-publisher
val authorPublisher: Publisher[Author] =
Source(tweets).via(authors).runWith(Sink.publisher)
Source(tweets).via(authors).runWith(Sink.publisher(1))
authorPublisher.subscribe(storage)
//#source-publisher
@ -108,7 +108,7 @@ class ReactiveStreamsDocSpec extends AkkaSpec {
//#source-fanoutPublisher
val authorPublisher: Publisher[Author] =
Source(tweets).via(authors)
.runWith(Sink.fanoutPublisher(initialBufferSize = 8, maximumBufferSize = 16))
.runWith(Sink.publisher(maxNumberOfSubscribers = Int.MaxValue))
authorPublisher.subscribe(storage)
authorPublisher.subscribe(alert)

9
akka-docs-dev/rst/scala/stream-integrations.rst
View file

@ -102,8 +102,8 @@ This is how it can be used as input :class:`Source` to a :class:`Flow`:
.. includecode:: code/docs/stream/ActorPublisherDocSpec.scala#actor-publisher-usage
You can only attach one subscriber to this publisher. Use a ``Broadcast``
element or attach a ``Sink.fanoutPublisher`` to enable multiple subscribers.
A publisher that is created with ``Sink.publisher`` supports a specified number of subscribers. Additional
subscription attempts will be rejected with an :class:`IllegalStateException`.
ActorSubscriber
^^^^^^^^^^^^^^^
@ -412,15 +412,14 @@ by using the Publisher-:class:`Sink`:
A publisher that is created with ``Sink.publisher`` only supports one subscriber. A second
subscription attempt will be rejected with an :class:`IllegalStateException`.
A publisher that supports multiple subscribers can be created with ``Sink.fanoutPublisher``
instead:
A publisher that supports multiple subscribers is created as follows:
.. includecode:: code/docs/stream/ReactiveStreamsDocSpec.scala
:include: author-alert-subscriber,author-storage-subscriber
.. includecode:: code/docs/stream/ReactiveStreamsDocSpec.scala#source-fanoutPublisher
The buffer size controls how far apart the slowest subscriber can be from the fastest subscriber
The input buffer size of the stage controls how far apart the slowest subscriber can be from the fastest subscriber
before slowing down the stream.
To make the picture complete, it is also possible to expose a :class:`Sink` as a :class:`Subscriber`