Akka/Scala example source code file (FutureTimeoutSupport.scala)

This example Akka source code file (FutureTimeoutSupport.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

actor, akka, concurrent, duration, executioncontext, finiteduration, future, futuretimeoutsupport, nonfatal, pattern, promise, scheduler, time, utilities

The FutureTimeoutSupport.scala Akka example source code

package akka.pattern

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */

import scala.concurrent.duration.Duration
import scala.concurrent.{ ExecutionContext, Promise, Future }
import akka.actor._
import scala.util.control.NonFatal
import scala.concurrent.duration.FiniteDuration

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
    }
}