Returns a java.util.concurrent.CompletionStage that will be completed with the success or failure of the provided value after the specified duration.
Returns a java.util.concurrent.CompletionStage that will be completed with the success or failure of the provided Callable after the specified duration.
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.
final CompletionStage<Object> f = Patterns.ask( selection, new akka.japi.Function<ActorRef, Object> { Object apply(ActorRef askSender) { return new Request(askSender); } }, timeout);
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target akka.actor.ActorSelection
needs to send the result to the sender
reference provided.
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target akka.actor.ActorSelection
needs to send the result to the sender
reference provided. The CompletionStage
will be completed with an akka.pattern.AskTimeoutException after the
given timeout has expired; this is independent from any timeout applied
while awaiting a result for this future (i.e. in
Await.result(..., timeout)
).
Warning: When using future callbacks, inside actors you need to carefully avoid closing over the containing actor’s object, i.e. do not call methods or access mutable state on the enclosing actor from within the callback. This would break the actor encapsulation and may introduce synchronization bugs and race conditions because the callback will be scheduled concurrently to the enclosing actor. Unfortunately there is not yet a way to detect these illegal accesses at compile time.
Recommended usage:
final CompletionStage<Object> f = Patterns.ask(selection, request, timeout); f.onSuccess(new Procedure<Object>() { public void apply(Object o) { nextActor.tell(new EnrichedResult(request, o)); } });
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target akka.actor.ActorSelection
needs to send the result to the sender
reference provided.
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target akka.actor.ActorSelection
needs to send the result to the sender
reference provided. The CompletionStage
will be completed with an akka.pattern.AskTimeoutException after the
given timeout has expired; this is independent from any timeout applied
while awaiting a result for this future (i.e. in
Await.result(..., timeout)
).
Warning: When using future callbacks, inside actors you need to carefully avoid closing over the containing actor’s object, i.e. do not call methods or access mutable state on the enclosing actor from within the callback. This would break the actor encapsulation and may introduce synchronization bugs and race conditions because the callback will be scheduled concurrently to the enclosing actor. Unfortunately there is not yet a way to detect these illegal accesses at compile time.
Recommended usage:
final CompletionStage<Object> f = Patterns.ask(selection, request, timeout); f.onSuccess(new Procedure<Object>() { public void apply(Object o) { nextActor.tell(new EnrichedResult(request, o)); } });
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.
final CompletionStage<Object> f = Patterns.ask( worker, new akka.japi.Function<ActorRef, Object> { Object apply(ActorRef askSender) { return new Request(askSender); } }, timeout);
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target actor
needs to send the result to the sender
reference provided.
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target actor
needs to send the result to the sender
reference provided. The CompletionStage
will be completed with an akka.pattern.AskTimeoutException after the
given timeout has expired; this is independent from any timeout applied
while awaiting a result for this future (i.e. in
Await.result(..., timeout)
).
Warning: When using future callbacks, inside actors you need to carefully avoid closing over the containing actor’s object, i.e. do not call methods or access mutable state on the enclosing actor from within the callback. This would break the actor encapsulation and may introduce synchronization bugs and race conditions because the callback will be scheduled concurrently to the enclosing actor. Unfortunately there is not yet a way to detect these illegal accesses at compile time.
Recommended usage:
final CompletionStage<Object> f = Patterns.ask(worker, request, timeout); f.onSuccess(new Procedure<Object>() { public void apply(Object o) { nextActor.tell(new EnrichedResult(request, o)); } });
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.
final CompletionStage<Object> f = Patterns.ask( worker, new akka.japi.Function<ActorRef, Object> { Object apply(ActorRef askSender) { return new Request(askSender); } }, timeout);
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target actor
needs to send the result to the sender
reference provided.
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a java.util.concurrent.CompletionStage
holding the eventual reply message; this means that the target actor
needs to send the result to the sender
reference provided. The CompletionStage
will be completed with an akka.pattern.AskTimeoutException after the
given timeout has expired; this is independent from any timeout applied
while awaiting a result for this future (i.e. in
Await.result(..., timeout)
).
Warning: When using future callbacks, inside actors you need to carefully avoid closing over the containing actor’s object, i.e. do not call methods or access mutable state on the enclosing actor from within the callback. This would break the actor encapsulation and may introduce synchronization bugs and race conditions because the callback will be scheduled concurrently to the enclosing actor. Unfortunately there is not yet a way to detect these illegal accesses at compile time.
Recommended usage:
final CompletionStage<Object> f = Patterns.ask(worker, request, timeout); f.onSuccess(new Procedure<Object>() { public void apply(Object o) { nextActor.tell(new EnrichedResult(request, o)); } });
Returns a java.util.concurrent.CompletionStage that will be completed with success (value true
) when
existing messages of the target actor has been processed and the actor has been
terminated.
Returns a java.util.concurrent.CompletionStage that will be completed with success (value true
) when
existing messages of the target actor has been processed and the actor has been
terminated.
Useful when you need to wait for termination or compose ordered termination of several actors.
If you want to invoke specialized stopping logic on your target actor instead of PoisonPill, you can pass your
stop command as stopMessage
parameter
If the target actor isn't terminated within the timeout the java.util.concurrent.CompletionStage is completed with failure akka.pattern.AskTimeoutException.
Returns a java.util.concurrent.CompletionStage that will be completed with success (value true
) when
existing messages of the target actor has been processed and the actor has been
terminated.
Returns a java.util.concurrent.CompletionStage that will be completed with success (value true
) when
existing messages of the target actor has been processed and the actor has been
terminated.
Useful when you need to wait for termination or compose ordered termination of several actors.
If the target actor isn't terminated within the timeout the java.util.concurrent.CompletionStage is completed with failure akka.pattern.AskTimeoutException.
Register an onComplete callback on this java.util.concurrent.CompletionStage to send the result to the given akka.actor.ActorRef or akka.actor.ActorSelection.
Register an onComplete callback on this java.util.concurrent.CompletionStage to send the result to the given akka.actor.ActorRef or akka.actor.ActorSelection. Returns the original CompletionStage to allow method chaining. If the future was completed with failure it is sent as a akka.actor.Status.Failure to the recipient.
Recommended usage example:
final CompletionStage<Object> f = Patterns.ask(worker, request, timeout); // apply some transformation (i.e. enrich with request info) final CompletionStage<Object> transformed = f.map(new akka.japi.Function<Object, Object>() { ... }); // send it on to the next stage Patterns.pipe(transformed).to(nextActor);
Java 8+ API for Akka patterns such as
ask
,pipe
and others which work with java.util.concurrent.CompletionStage.For working with Scala scala.concurrent.Future from Java you may want to use akka.pattern.Patterns instead.