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Replacing awaitOne with a listener based approach

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This commit is contained in:
Viktor Klang 2010-11-12 12:52:08 +01:00
parent 249f14191d
commit 4ccd860e19
1 changed files with 12 additions and 7 deletions
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19
akka-actor/src/main/scala/dispatch/Future.scala
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@ -41,13 +41,11 @@ object Futures {
* Returns the First Future that is completed
* if no Future is completed, awaitOne optionally sleeps "sleepMs" millis and then re-scans
*/
def awaitOne(futures: List[Future[_]], sleepMs: Long = 0): Future[_] = {
var future: Option[Future[_]] = None
do {
future = futures.find(_.isCompleted)
if (sleepMs > 0 && future.isEmpty) Thread.sleep(sleepMs)
} while (future.isEmpty)
future.get
def awaitOne(futures: List[Future[_]], timeout: Long = Long.MaxValue): Future[_] = {
val futureResult = new DefaultCompletableFuture[Any](timeout)
val fun = (f: Future[_]) => futureResult completeWith f.asInstanceOf[Future[Any]]
for(f <- futures) f onComplete fun
futureResult.await
}
/**
@ -124,6 +122,13 @@ sealed trait Future[T] {
trait CompletableFuture[T] extends Future[T] {
def completeWithResult(result: T)
def completeWithException(exception: Throwable)
def completeWith(other: Future[T]) {
val result = other.result
val exception = other.exception
if (result.isDefined) completeWithResult(result.get)
else if (exception.isDefined) completeWithException(exception.get)
//else TODO how to handle this case?
}
}
// Based on code from the actorom actor framework by Sergio Bossa [http://code.google.com/p/actorom/].