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MaybeSource rewritten as GraphStage #22789

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Johan Andrén 2017-07-05 12:55:28 +01:00 • committed by GitHub
parent 8a095ed23d
commit 2b2923f1b6
10 changed files with 272 additions and 145 deletions
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13
akka-stream/src/main/scala/akka/stream/impl/Modules.scala
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@ -77,19 +77,6 @@ import akka.util.OptionVal
override def withAttributes(attr: Attributes): SourceModule[Out, NotUsed] = new PublisherSource[Out](p, attr, amendShape(attr))
}
/**
* INTERNAL API
*/
@InternalApi private[akka] final class MaybeSource[Out](val attributes: Attributes, shape: SourceShape[Out]) extends SourceModule[Out, Promise[Option[Out]]](shape) {
override def create(context: MaterializationContext) = {
val p = Promise[Option[Out]]()
new MaybePublisher[Out](p, attributes.nameOrDefault("MaybeSource"))(context.materializer.executionContext) → p
}
override protected def newInstance(shape: SourceShape[Out]): SourceModule[Out, Promise[Option[Out]]] = new MaybeSource[Out](attributes, shape)
override def withAttributes(attr: Attributes): SourceModule[Out, Promise[Option[Out]]] = new MaybeSource(attr, amendShape(attr))
}
/**
* INTERNAL API
* Creates and wraps an actor into [[org.reactivestreams.Publisher]] from the given `props`,