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Merge pull request #18833 from drewhk/wip-18735-idleInject-drewhk

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+str 18735: Added keepalive inject and initial delay ops
This commit is contained in:
drewhk 2015-11-03 11:50:45 +01:00
commit aa339e41ec
12 changed files with 595 additions and 71 deletions
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58
akka-stream/src/main/scala/akka/stream/javadsl/Source.scala
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@ -849,6 +849,14 @@ final class Source[+Out, +Mat](delegate: scaladsl.Source[Out, Mat]) extends Grap
/**
* If the first element has not passed through this stage before the provided timeout, the stream is failed
* with a [[java.util.concurrent.TimeoutException]].
*
* '''Emits when''' upstream emits an element
*
* '''Backpressures when''' downstream backpressures
*
* '''Completes when''' upstream completes or fails if timeout elapses before first element arrives
*
* '''Cancels when''' downstream cancels
*/
def initialTimeout(timeout: FiniteDuration): javadsl.Source[Out, Mat] =
new Source(delegate.initialTimeout(timeout))
@ -856,6 +864,14 @@ final class Source[+Out, +Mat](delegate: scaladsl.Source[Out, Mat]) extends Grap
/**
* If the completion of the stream does not happen until the provided timeout, the stream is failed
* with a [[java.util.concurrent.TimeoutException]].
*
* '''Emits when''' upstream emits an element
*
* '''Backpressures when''' downstream backpressures
*
* '''Completes when''' upstream completes or fails if timeout elapses before upstream completes
*
* '''Cancels when''' downstream cancels
*/
def completionTimeout(timeout: FiniteDuration): javadsl.Source[Out, Mat] =
new Source(delegate.completionTimeout(timeout))
@ -863,10 +879,52 @@ final class Source[+Out, +Mat](delegate: scaladsl.Source[Out, Mat]) extends Grap
/**
* If the time between two processed elements exceed the provided timeout, the stream is failed
* with a [[java.util.concurrent.TimeoutException]].
*
* '''Emits when''' upstream emits an element
*
* '''Backpressures when''' downstream backpressures
*
* '''Completes when''' upstream completes or fails if timeout elapses between two emitted elements
*
* '''Cancels when''' downstream cancels
*/
def idleTimeout(timeout: FiniteDuration): javadsl.Source[Out, Mat] =
new Source(delegate.idleTimeout(timeout))
/**
* Injects additional elements if the upstream does not emit for a configured amount of time. In other words, this
* stage attempts to maintains a base rate of emitted elements towards the downstream.
*
* If the downstream backpressures then no element is injected until downstream demand arrives. Injected elements
* do not accumulate during this period.
*
* Upstream elements are always preferred over injected elements.
*
* '''Emits when''' upstream emits an element or if the upstream was idle for the configured period
*
* '''Backpressures when''' downstream backpressures
*
* '''Completes when''' upstream completes
*
* '''Cancels when''' downstream cancels
*/
def keepAlive[U >: Out](maxIdle: FiniteDuration, injectedElem: function.Creator[U]): javadsl.Source[U, Mat] =
new Source(delegate.keepAlive(maxIdle, () ⇒ injectedElem.create()))
/**
* Delays the initial element by the specified duration.
*
* '''Emits when''' upstream emits an element if the initial delay already elapsed
*
* '''Backpressures when''' downstream backpressures or initial delay not yet elapsed
*
* '''Completes when''' upstream completes
*
* '''Cancels when''' downstream cancels
*/
def initialDelay(delay: FiniteDuration): javadsl.Source[Out, Mat] =
new Source(delegate.initialDelay(delay))
override def withAttributes(attr: Attributes): javadsl.Source[Out, Mat] =
new Source(delegate.withAttributes(attr))