akka.pattern.FutureTimeoutSupport.scala Maven / Gradle / Ivy
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/**
* Copyright (C) 2009-2016 Lightbend Inc.
*/
package akka.pattern
import scala.concurrent.{ ExecutionContext, Promise, Future }
import akka.actor._
import scala.util.control.NonFatal
import scala.concurrent.duration.FiniteDuration
import java.util.concurrent.CompletionStage
import java.util.concurrent.CompletableFuture
import akka.dispatch.Futures
import java.util.function.BiConsumer
trait FutureTimeoutSupport {
/**
* Returns a [[scala.concurrent.Future]] that will be completed with the success or failure of the provided value
* after the specified duration.
*/
def after[T](duration: FiniteDuration, using: Scheduler)(value: ⇒ Future[T])(implicit ec: ExecutionContext): Future[T] =
if (duration.isFinite() && duration.length < 1) {
try value catch { case NonFatal(t) ⇒ Future.failed(t) }
} else {
val p = Promise[T]()
using.scheduleOnce(duration) { p completeWith { try value catch { case NonFatal(t) ⇒ Future.failed(t) } } }
p.future
}
/**
* Returns a [[scala.concurrent.Future]] that will be completed with the success or failure of the provided value
* after the specified duration.
*/
def afterCompletionStage[T](duration: FiniteDuration, using: Scheduler)(value: ⇒ CompletionStage[T])(implicit ec: ExecutionContext): CompletionStage[T] =
if (duration.isFinite() && duration.length < 1) {
try value catch { case NonFatal(t) ⇒ Futures.failedCompletionStage(t) }
} else {
val p = new CompletableFuture[T]
using.scheduleOnce(duration) {
try {
val future = value
future.whenComplete(new BiConsumer[T, Throwable] {
override def accept(t: T, ex: Throwable): Unit = {
if (t != null) p.complete(t)
if (ex != null) p.completeExceptionally(ex)
}
})
} catch {
case NonFatal(ex) ⇒ p.completeExceptionally(ex)
}
}
p
}
}