Returns a scala.concurrent.Future that will be completed with the success or failure of the provided Callable after the specified duration.
Returns a scala.concurrent.Future that will be completed with the success or failure of the provided Callable after the specified duration.
Java API for `akka.pattern.ask`:
Sends a message asynchronously and returns a scala.concurrent.Future
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 scala.concurrent.Future
holding the eventual reply message; this means that the target akka.actor.ActorSelection
needs to send the result to the sender
reference provided. The Future
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 Future<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 scala.concurrent.Future
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 scala.concurrent.Future
holding the eventual reply message; this means that the target akka.actor.ActorSelection
needs to send the result to the sender
reference provided. The Future
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 Future<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 scala.concurrent.Future
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 scala.concurrent.Future
holding the eventual reply message; this means that the target actor
needs to send the result to the sender
reference provided. The Future
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 Future<Object> f = Patterns.ask(worker, 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 scala.concurrent.Future
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 scala.concurrent.Future
holding the eventual reply message; this means that the target actor
needs to send the result to the sender
reference provided. The Future
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 Future<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 Future<Object> f = Patterns.askWithReplyTo( selection, replyTo -> new Request(replyTo), timeout);
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 Future<Object> f = Patterns.askWithReplyTo( worker, replyTo -> new Request(replyTo), timeout);
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 Future<Object> f = Patterns.askWithReplyTo( worker, replyTo -> new Request(replyTo), timeout);
Returns a scala.concurrent.Future 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 scala.concurrent.Future 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 scala.concurrent.Future is completed with failure akka.pattern.AskTimeoutException.
Returns a scala.concurrent.Future 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 scala.concurrent.Future 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 scala.concurrent.Future is completed with failure akka.pattern.AskTimeoutException.
Register an onComplete callback on this scala.concurrent.Future to send the result to the given akka.actor.ActorRef or akka.actor.ActorSelection.
Register an onComplete callback on this scala.concurrent.Future to send the result to the given akka.actor.ActorRef or akka.actor.ActorSelection. Returns the original Future 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 Future<Object> f = Patterns.ask(worker, request, timeout); // apply some transformation (i.e. enrich with request info) final Future<Object> transformed = f.map(new akka.japi.Function<Object, Object>() { ... }); // send it on to the next operator Patterns.pipe(transformed, context).to(nextActor);
Returns an internally retrying scala.concurrent.Future The first attempt will be made immediately, and each subsequent attempt will be made after 'delay'.
Returns an internally retrying scala.concurrent.Future The first attempt will be made immediately, and each subsequent attempt will be made after 'delay'. A scheduler (eg context.system.scheduler) must be provided to delay each retry If attempts are exhausted the returned future is simply the result of invoking attempt. Note that the attempt function will be invoked on the given execution context for subsequent tries and therefore must be thread safe (not touch unsafe mutable state).
"Pre Java 8" Java API for Akka patterns such as
ask
,pipe
and others.These methods are possible to call from Java however work with the Scala scala.concurrent.Future, due to the lack of non-blocking reactive Future implementation before Java 8.
For Java applications developed with Java 8 and later, you might want to use akka.pattern.PatternsCS instead, which provide alternatives for these patterns which work with java.util.concurrent.CompletionStage.