Class GracefulStopSupport

GracefulStop extensions.

Inheritance

Object

GracefulStopSupport

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: Akka.Actor

Assembly: Akka.dll

Syntax

public static class GracefulStopSupport

Methods

GracefulStop(IActorRef, TimeSpan)

Returns a Task that will be completed with success when existing messages of the target actor have been processed and the actor has been terminated.

Useful when you need to wait for termination or compose ordered termination of several actors, which should only be done outside of the ActorSystem as blocking inside ActorBase is discouraged.

IMPORTANT: the actor being terminated and its supervisor being informed of the availability of the deceased actor's name are two distinct operations, which do not obey any reliable ordering.

If the target actor isn't terminated within the timeout the Task is completed with failure.

If you want to invoke specialized stopping logic on your target actor instead of PoisonPill, you can pass your stop command as a parameter:

    GracefulStop(someChild, timeout, MyStopGracefullyMessage).ContinueWith(r => {
        // Do something after someChild starts being stopped.
    });

Declaration

public static Task<bool> GracefulStop(this IActorRef target, TimeSpan timeout)

Parameters

Type	Name	Description
IActorRef	target	The actor to be terminated.
TimeSpan	timeout	The amount of time we're going to wait for the actor to terminate.

Returns

Type	Description
Task<Boolean>	A Task that will return true if the target shuts down within timeout.

GracefulStop(IActorRef, TimeSpan, Object)

Returns a Task that will be completed with success when existing messages of the target actor have been processed and the actor has been terminated.

Useful when you need to wait for termination or compose ordered termination of several actors, which should only be done outside of the ActorSystem as blocking inside ActorBase is discouraged.

IMPORTANT: the actor being terminated and its supervisor being informed of the availability of the deceased actor's name are two distinct operations, which do not obey any reliable ordering.

If the target actor isn't terminated within the timeout the Task is completed with failure.

If you want to invoke specialized stopping logic on your target actor instead of PoisonPill, you can pass your stop command as a parameter:

    GracefulStop(someChild, timeout, MyStopGracefullyMessage).ContinueWith(r => {
        // Do something after someChild starts being stopped.
    });

Declaration

public static async Task<bool> GracefulStop(this IActorRef target, TimeSpan timeout, object stopMessage)

Parameters

Type	Name	Description
IActorRef	target	The actor to be terminated.
TimeSpan	timeout	The amount of time we're going to wait for the actor to terminate.
Object	stopMessage	A custom message to use to shutdown target - by default the other overload uses PoisonPill.

Returns

Type	Description
Task<Boolean>	A Task that will return true if the target shuts down within timeout

Exceptions

Type	Condition
TaskCanceledException	This exception is thrown if the underlying task is Canceled.