concurrent

Type Members

1. class ActorRefProvider[T <: Actor] extends Provider[ActorRef]

   

   Provider for creating actor refs

2. class ActorSystemProvider extends Provider[ActorSystem]

   

   Provider for the actor system

   Provider for the actor system

   Annotations

   @Singleton()

3. trait AkkaComponents extends AnyRef

   

   Components for configuring Akka.

4. trait AkkaGuiceSupport extends AnyRef

   

   Support for binding actors with Guice.

   Support for binding actors with Guice.

   Mix this trait in with a Guice AbstractModule to get convenient support for binding actors. For example:

   class MyModule extends AbstractModule with AkkaGuiceSupport {
     def configure = {
       bindActor[MyActor]("myActor")
     }
   }

   Then to use the above actor in your application, add a qualified injected dependency, like so:

   class MyController @Inject() (@Named("myActor") myActor: ActorRef) extends Controller {
     ...
   }

5. class ExecutionContextProvider extends Provider[ExecutionContextExecutor]

   

   Provider for the default execution context

   Provider for the default execution context

   Annotations

   @Singleton()

6. trait InjectedActorSupport extends AnyRef

   

   Support for creating injected child actors.

7. trait LowPriorityTimeoutImplicits extends AnyRef

   

   Low priority timeouts to add withTimeout methods to scala.concurrent.Future.

8. class MaterializerProvider extends Provider[Materializer]

   

   Provider for the default flow materializer

   Provider for the default flow materializer

   Annotations

   @Singleton()

9. trait Timeout extends AnyRef

   

   This trait is used to provide a non-blocking timeout on an operation that returns a Future.

   This trait is used to provide a non-blocking timeout on an operation that returns a Future.

   Please note that the play.api.Application default ActorSystem should be used as input here, as the actorSystem.scheduler is responsible for scheduling the timeout, using akka.pattern.actor under the hood.

   You can dependency inject the ActorSystem as follows to create a Future that will timeout after a certain period of time:

   class MyService(val actorSystem: ActorSystem) extends Timeout {
   
     def calculateWithTimeout(timeoutDuration: FiniteDuration): Future[Int] = {
       timeout(actorSystem, timeoutDuration)(rawCalculation())
     }
   
     def rawCalculation(): Future[Int] = {
       import akka.pattern.after
       implicit val ec = actorSystem.dispatcher
       akka.pattern.after(300 millis, actorSystem.scheduler)(Future(42))(actorSystem.dispatcher)
     }
   }

   You should check for timeout by using Future.recover() or Future.recoverWith() and checking for TimeoutException:

   val future = myService.calculateWithTimeout(100 millis).recover {
     case _: TimeoutException =>
       -1
   }

   See also

   Futures and Promises