Class Patterns$
- java.lang.Object
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- akka.pattern.Patterns$
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public class Patterns$ extends java.lang.Object
Java API: for Akka patterns such asask
,pipe
and others which work withCompletionStage
.
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Constructor Summary
Constructors Constructor Description Patterns$()
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description <T> java.util.concurrent.CompletionStage<T>
after(java.time.Duration duration, ClassicActorSystemProvider system, java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> value)
Returns aCompletionStage
that will be completed with the success or failure of the provided Callable after the specified duration.<T> java.util.concurrent.CompletionStage<T>
after(java.time.Duration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> value)
Returns aCompletionStage
that will be completed with the success or failure of the provided Callable after the specified duration.<T> java.util.concurrent.CompletionStage<T>
after(java.time.Duration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, java.util.concurrent.CompletionStage<T> value)
Deprecated.Use the overloaded one which accepts a Callable of CompletionStage instead.<T> scala.concurrent.Future<T>
after(scala.concurrent.duration.FiniteDuration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, java.util.concurrent.Callable<scala.concurrent.Future<T>> value)
Returns aFuture
that will be completed with the success or failure of the provided Callable after the specified duration.<T> scala.concurrent.Future<T>
after(scala.concurrent.duration.FiniteDuration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, scala.concurrent.Future<T> value)
Deprecated.Use the overload one which accepts a Callable of Future instead.scala.concurrent.Future<java.lang.Object>
ask(ActorRef actor, java.lang.Object message, long timeoutMillis)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the target actor needs to send the result to thesender
reference provided.scala.concurrent.Future<java.lang.Object>
ask(ActorRef actor, java.lang.Object message, Timeout timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the target actor needs to send the result to thesender
reference provided.java.util.concurrent.CompletionStage<java.lang.Object>
ask(ActorRef actor, java.lang.Object message, java.time.Duration timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aCompletionStage
holding the eventual reply message; this means that the target actor needs to send the result to thesender
reference provided.scala.concurrent.Future<java.lang.Object>
ask(ActorSelection selection, java.lang.Object message, long timeoutMillis)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the targetActorSelection
needs to send the result to thesender
reference provided.scala.concurrent.Future<java.lang.Object>
ask(ActorSelection selection, java.lang.Object message, Timeout timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the targetActorSelection
needs to send the result to thesender
reference provided.java.util.concurrent.CompletionStage<java.lang.Object>
ask(ActorSelection selection, java.lang.Object message, java.time.Duration timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aCompletionStage
holding the eventual reply message; this means that the targetActorSelection
needs to send the result to thesender
reference provided.java.util.concurrent.CompletionStage<java.lang.Object>
askWithReplyTo(ActorRef actor, Function<ActorRef,java.lang.Object> messageFactory, java.time.Duration timeout)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.scala.concurrent.Future<java.lang.Object>
askWithReplyTo(ActorRef actor, Function<ActorRef,java.lang.Object> messageFactory, long timeoutMillis)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.scala.concurrent.Future<java.lang.Object>
askWithReplyTo(ActorRef actor, Function<ActorRef,java.lang.Object> messageFactory, Timeout timeout)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.scala.concurrent.Future<java.lang.Object>
askWithReplyTo(ActorSelection selection, Function<ActorRef,java.lang.Object> messageFactory, long timeoutMillis)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.java.util.concurrent.CompletionStage<java.lang.Object>
askWithReplyTo(ActorSelection selection, Function<ActorRef,java.lang.Object> messageFactory, java.time.Duration timeout)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.java.util.concurrent.CompletionStage<java.lang.Object>
askWithStatus(ActorRef actor, java.lang.Object message, java.time.Duration timeout)
Use for messages whose response is known to be aStatusReply
.java.util.concurrent.CompletionStage<java.lang.Boolean>
gracefulStop(ActorRef target, java.time.Duration timeout)
Returns aCompletionStage
that will be completed with success (valuetrue
) when existing messages of the target actor has been processed and the actor has been terminated.java.util.concurrent.CompletionStage<java.lang.Boolean>
gracefulStop(ActorRef target, java.time.Duration timeout, java.lang.Object stopMessage)
Returns aCompletionStage
that will be completed with success (valuetrue
) when existing messages of the target actor has been processed and the actor has been terminated.scala.concurrent.Future<java.lang.Boolean>
gracefulStop(ActorRef target, scala.concurrent.duration.FiniteDuration timeout)
Returns aFuture
that will be completed with success (valuetrue
) when existing messages of the target actor has been processed and the actor has been terminated.scala.concurrent.Future<java.lang.Boolean>
gracefulStop(ActorRef target, scala.concurrent.duration.FiniteDuration timeout, java.lang.Object stopMessage)
Returns aFuture
that will be completed with success (valuetrue
) when existing messages of the target actor has been processed and the actor has been terminated.<T> PipeToSupport.PipeableCompletionStage<T>
pipe(java.util.concurrent.CompletionStage<T> future, scala.concurrent.ExecutionContext context)
<T> PipeToSupport.PipeableFuture<T>
pipe(scala.concurrent.Future<T> future, scala.concurrent.ExecutionContext context)
Register an onComplete callback on thisFuture
to send the result to the givenActorRef
orActorSelection
.<T> java.util.concurrent.CompletionStage<T>
retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration delay, ClassicActorSystemProvider system)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, and each subsequent attempt will be made after 'delay'.<T> java.util.concurrent.CompletionStage<T>
retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration delay, Scheduler scheduler, scala.concurrent.ExecutionContext ec)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, and each subsequent attempt will be made after 'delay'.<T> java.util.concurrent.CompletionStage<T>
retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration minBackoff, java.time.Duration maxBackoff, double randomFactor, ClassicActorSystemProvider system)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, each subsequent attempt will be made with a backoff time, if the previous attempt failed.<T> java.util.concurrent.CompletionStage<T>
retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration minBackoff, java.time.Duration maxBackoff, double randomFactor, Scheduler scheduler, scala.concurrent.ExecutionContext ec)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, each subsequent attempt will be made with a backoff time, if the previous attempt failed.<T> java.util.concurrent.CompletionStage<T>
retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.util.function.IntFunction<java.util.Optional<java.time.Duration>> delayFunction, Scheduler scheduler, scala.concurrent.ExecutionContext context)
Returns an internally retryingCompletionStage
.<T> java.util.concurrent.CompletionStage<T>
retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, scala.concurrent.ExecutionContext ec)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, each subsequent attempt will be made immediately if the previous attempt failed.<T> scala.concurrent.Future<T>
retry(java.util.concurrent.Callable<scala.concurrent.Future<T>> attempt, int attempts, scala.concurrent.duration.FiniteDuration delay, Scheduler scheduler, scala.concurrent.ExecutionContext context)
Returns an internally retryingFuture
The first attempt will be made immediately, and each subsequent attempt will be made after 'delay'.
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Field Detail
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MODULE$
public static final Patterns$ MODULE$
Static reference to the singleton instance of this Scala object.
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Method Detail
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ask
public scala.concurrent.Future<java.lang.Object> ask(ActorRef actor, java.lang.Object message, Timeout timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the target actor needs to send the result to thesender
reference provided.The Future will be completed with an
AskTimeoutException
after the given timeout has expired; this is independent from any timeout applied while awaiting a result for this future (i.e. inAwait.result(..., timeout)
). A typical reason forAskTimeoutException
is that the recipient actor didn't send a reply.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)); } });
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ask
public java.util.concurrent.CompletionStage<java.lang.Object> ask(ActorRef actor, java.lang.Object message, java.time.Duration timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aCompletionStage
holding the eventual reply message; this means that the target actor needs to send the result to thesender
reference provided.The CompletionStage will be completed with an
AskTimeoutException
after the given timeout has expired; this is independent from any timeout applied while awaiting a result for this future (i.e. inAwait.result(..., timeout)
). A typical reason forAskTimeoutException
is that the recipient actor didn't send a reply.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, duration); f.thenRun(result -> nextActor.tell(new EnrichedResult(request, result)));
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askWithStatus
public java.util.concurrent.CompletionStage<java.lang.Object> askWithStatus(ActorRef actor, java.lang.Object message, java.time.Duration timeout)
Use for messages whose response is known to be aStatusReply
. When aStatusReply.success(T)
response arrives the future is completed with the wrapped value, if aStatusReply.error(java.lang.String)
arrives the future is instead failed.
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askWithReplyTo
public scala.concurrent.Future<java.lang.Object> askWithReplyTo(ActorRef actor, Function<ActorRef,java.lang.Object> messageFactory, Timeout timeout)
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);
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askWithReplyTo
public java.util.concurrent.CompletionStage<java.lang.Object> askWithReplyTo(ActorRef actor, Function<ActorRef,java.lang.Object> messageFactory, java.time.Duration timeout)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.final CompletionStage<Object> f = Patterns.askWithReplyTo( worker, askSender -> new Request(askSender), timeout);
- Parameters:
actor
- the actor to be askedmessageFactory
- function taking an actor ref and returning the message to be senttimeout
- the timeout for the response before failing the returned completion stage
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ask
public scala.concurrent.Future<java.lang.Object> ask(ActorRef actor, java.lang.Object message, long timeoutMillis)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the target actor needs to send the result to thesender
reference provided.The Future will be completed with an
AskTimeoutException
after the given timeout has expired; this is independent from any timeout applied while awaiting a result for this future (i.e. inAwait.result(..., timeout)
). A typical reason forAskTimeoutException
is that the recipient actor didn't send a reply.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)); } });
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askWithReplyTo
public scala.concurrent.Future<java.lang.Object> askWithReplyTo(ActorRef actor, Function<ActorRef,java.lang.Object> messageFactory, long timeoutMillis)
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);
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ask
public scala.concurrent.Future<java.lang.Object> ask(ActorSelection selection, java.lang.Object message, Timeout timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the targetActorSelection
needs to send the result to thesender
reference provided.The Future will be completed with an
AskTimeoutException
after the given timeout has expired; this is independent from any timeout applied while awaiting a result for this future (i.e. inAwait.result(..., timeout)
). A typical reason forAskTimeoutException
is that the recipient actor didn't send a reply.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)); } });
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ask
public java.util.concurrent.CompletionStage<java.lang.Object> ask(ActorSelection selection, java.lang.Object message, java.time.Duration timeout)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aCompletionStage
holding the eventual reply message; this means that the targetActorSelection
needs to send the result to thesender
reference provided.The CompletionStage will be completed with an
AskTimeoutException
after the given timeout has expired; this is independent from any timeout applied while awaiting a result for this future (i.e. inAwait.result(..., timeout)
). A typical reason forAskTimeoutException
is that the recipient actor didn't send a reply.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, duration); f.thenRun(result -> nextActor.tell(new EnrichedResult(request, result)));
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ask
public scala.concurrent.Future<java.lang.Object> ask(ActorSelection selection, java.lang.Object message, long timeoutMillis)
Java API forakka.pattern.ask
: Sends a message asynchronously and returns aFuture
holding the eventual reply message; this means that the targetActorSelection
needs to send the result to thesender
reference provided.The Future will be completed with an
AskTimeoutException
after the given timeout has expired; this is independent from any timeout applied while awaiting a result for this future (i.e. inAwait.result(..., timeout)
). A typical reason forAskTimeoutException
is that the recipient actor didn't send a reply.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)); } });
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askWithReplyTo
public scala.concurrent.Future<java.lang.Object> askWithReplyTo(ActorSelection selection, Function<ActorRef,java.lang.Object> messageFactory, long timeoutMillis)
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);
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askWithReplyTo
public java.util.concurrent.CompletionStage<java.lang.Object> askWithReplyTo(ActorSelection selection, Function<ActorRef,java.lang.Object> messageFactory, java.time.Duration timeout)
A variation of ask which allows to implement "replyTo" pattern by including sender reference in message.final CompletionStage<Object> f = Patterns.askWithReplyTo( selection, replyTo -> new Request(replyTo), timeout);
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pipe
public <T> PipeToSupport.PipeableFuture<T> pipe(scala.concurrent.Future<T> future, scala.concurrent.ExecutionContext context)
Register an onComplete callback on thisFuture
to send the result to the givenActorRef
orActorSelection
. Returns the original Future to allow method chaining. If the future was completed with failure it is sent as aStatus.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);
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pipe
public <T> PipeToSupport.PipeableCompletionStage<T> pipe(java.util.concurrent.CompletionStage<T> future, scala.concurrent.ExecutionContext context)
When thisCompletionStage
finishes, send its result to the givenActorRef
orActorSelection
. Returns the original CompletionStage to allow method chaining. If the future was completed with failure it is sent as aStatus.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.thenApply(result -> { ... }); // send it on to the next operator Patterns.pipe(transformed, context).to(nextActor);
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gracefulStop
public scala.concurrent.Future<java.lang.Boolean> gracefulStop(ActorRef target, scala.concurrent.duration.FiniteDuration timeout)
Returns aFuture
that will be completed with success (valuetrue
) 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
Future
is completed with failureAskTimeoutException
.
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gracefulStop
public java.util.concurrent.CompletionStage<java.lang.Boolean> gracefulStop(ActorRef target, java.time.Duration timeout)
Returns aCompletionStage
that will be completed with success (valuetrue
) 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
CompletionStage
is completed with failureAskTimeoutException
.
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gracefulStop
public scala.concurrent.Future<java.lang.Boolean> gracefulStop(ActorRef target, scala.concurrent.duration.FiniteDuration timeout, java.lang.Object stopMessage)
Returns aFuture
that will be completed with success (valuetrue
) 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
parameterIf the target actor isn't terminated within the timeout the
Future
is completed with failureAskTimeoutException
.
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gracefulStop
public java.util.concurrent.CompletionStage<java.lang.Boolean> gracefulStop(ActorRef target, java.time.Duration timeout, java.lang.Object stopMessage)
Returns aCompletionStage
that will be completed with success (valuetrue
) 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
parameterIf the target actor isn't terminated within the timeout the
CompletionStage
is completed with failureAskTimeoutException
.
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after
public <T> scala.concurrent.Future<T> after(scala.concurrent.duration.FiniteDuration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, java.util.concurrent.Callable<scala.concurrent.Future<T>> value)
Returns aFuture
that will be completed with the success or failure of the provided Callable after the specified duration.
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after
public <T> java.util.concurrent.CompletionStage<T> after(java.time.Duration duration, ClassicActorSystemProvider system, java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> value)
Returns aCompletionStage
that will be completed with the success or failure of the provided Callable after the specified duration.
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after
public <T> java.util.concurrent.CompletionStage<T> after(java.time.Duration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> value)
Returns aCompletionStage
that will be completed with the success or failure of the provided Callable after the specified duration.
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after
public <T> scala.concurrent.Future<T> after(scala.concurrent.duration.FiniteDuration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, scala.concurrent.Future<T> value)
Deprecated.Use the overload one which accepts a Callable of Future instead. Since 2.5.22.Returns aFuture
that will be completed with the success or failure of the provided Callable after the specified duration.
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after
public <T> java.util.concurrent.CompletionStage<T> after(java.time.Duration duration, Scheduler scheduler, scala.concurrent.ExecutionContext context, java.util.concurrent.CompletionStage<T> value)
Deprecated.Use the overloaded one which accepts a Callable of CompletionStage instead. Since 2.5.22.Returns aCompletionStage
that will be completed with the success or failure of the provided value after the specified duration.
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retry
public <T> java.util.concurrent.CompletionStage<T> retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, scala.concurrent.ExecutionContext ec)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, each subsequent attempt will be made immediately if the previous attempt failed.If attempts are exhausted the returned completion operator 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).
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retry
public <T> java.util.concurrent.CompletionStage<T> retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration minBackoff, java.time.Duration maxBackoff, double randomFactor, ClassicActorSystemProvider system)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, each subsequent attempt will be made with a backoff time, if the previous attempt failed.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).
- Parameters:
minBackoff
- minimum (initial) duration until the child actor will started again, if it is terminatedmaxBackoff
- the exponential back-off is capped to this durationrandomFactor
- after calculation of the exponential back-off an additional random delay based on this factor is added, e.g.0.2
adds up to20%
delay. In order to skip this additional delay pass in0
.
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retry
public <T> java.util.concurrent.CompletionStage<T> retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration minBackoff, java.time.Duration maxBackoff, double randomFactor, Scheduler scheduler, scala.concurrent.ExecutionContext ec)
Returns an internally retryingCompletionStage
The first attempt will be made immediately, each subsequent attempt will be made with a backoff time, if the previous attempt failed.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).
- Parameters:
minBackoff
- minimum (initial) duration until the child actor will started again, if it is terminatedmaxBackoff
- the exponential back-off is capped to this durationrandomFactor
- after calculation of the exponential back-off an additional random delay based on this factor is added, e.g.0.2
adds up to20%
delay. In order to skip this additional delay pass in0
.
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retry
public <T> scala.concurrent.Future<T> retry(java.util.concurrent.Callable<scala.concurrent.Future<T>> attempt, int attempts, scala.concurrent.duration.FiniteDuration delay, Scheduler scheduler, scala.concurrent.ExecutionContext context)
Returns an internally retryingFuture
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 retryIf 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).
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retry
public <T> java.util.concurrent.CompletionStage<T> retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration delay, ClassicActorSystemProvider system)
Returns an internally retryingCompletionStage
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 retryIf attempts are exhausted the returned completion operator 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).
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retry
public <T> java.util.concurrent.CompletionStage<T> retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.time.Duration delay, Scheduler scheduler, scala.concurrent.ExecutionContext ec)
Returns an internally retryingCompletionStage
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 retryIf attempts are exhausted the returned completion operator 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).
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retry
public <T> java.util.concurrent.CompletionStage<T> retry(java.util.concurrent.Callable<java.util.concurrent.CompletionStage<T>> attempt, int attempts, java.util.function.IntFunction<java.util.Optional<java.time.Duration>> delayFunction, Scheduler scheduler, scala.concurrent.ExecutionContext context)
Returns an internally retryingCompletionStage
. The first attempt will be made immediately, each subsequent attempt will be made after the 'delay' return bydelayFunction
(the input next attempt count start from 1). Return an emptyOptional
instance for no delay. A scheduler (eg context.system.scheduler) must be provided to delay each retry. You could provide a function to generate the next delay duration after first attempt, this function should never returnnull
, otherwise anIllegalArgumentException
will be through.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).
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