Package org.apache.sshd.common.future

Interface CancelFuture

All Superinterfaces:

SshFuture<CancelFuture>, VerifiableFuture<Boolean>, WaitableFuture

All Known Implementing Classes:

DefaultCancelFuture

public interface CancelFuture
extends SshFuture<CancelFuture>, VerifiableFuture<Boolean>

Cancellations may not always be effective immediately. While a cancelled Cancellable future is considered canceled immediately, it may take some time until the underlying asynchronous operation is really canceled. A cancellation through Cancellable.cancel() returns a CancelFuture that can be used to wait for the cancellation to have been effected.

A CancelFuture is not cancellable itself.

Author:

Apache MINA SSHD Project

See Also:

Cancellable

Method Summary

Modifier and Type	Method	Description
CancellationException	getBackTrace()	Obtains an exception describing the stack trace of where the cancellation was initiated.
boolean	isCanceled()	Tells whether the cancellation has been effected.
void	setBackTrace(CancellationException backTrace)	Sets a CancellationException describing the stack trace of where the cancellation was initiated.
void	setCanceled()	Marks this CancelFuture as the cancellation having been effected.
void	setCanceled(Throwable error)	Marks this CancelFuture as the cancellation having been effected.
void	setNotCanceled()	Completes this future with a value indicating that the cancellation was not done.

Methods inherited from interface org.apache.sshd.common.future.SshFuture

addListener, removeListener

Methods inherited from interface org.apache.sshd.common.future.VerifiableFuture

verify, verify, verify, verify

Methods inherited from interface org.apache.sshd.common.future.WaitableFuture

await, await, await, await, awaitUninterruptibly, awaitUninterruptibly, awaitUninterruptibly, awaitUninterruptibly, getId, isDone

Method Detail

getBackTrace

CancellationException getBackTrace()

Obtains an exception describing the stack trace of where the cancellation was initiated.

Returns:

a CancellationException

isCanceled

boolean isCanceled()

Tells whether the cancellation has been effected. (WaitableFuture.isDone() && !isCanceled()) means the cancellation was not effected. In that case check the original operation for a success or failure value.

Returns:

true if the cancellation was done; false otherwise

setCanceled

void setCanceled()

Marks this CancelFuture as the cancellation having been effected.

This is a framework-internal method.

setCanceled

void setCanceled(Throwable error)

Marks this CancelFuture as the cancellation having been effected.

This is a framework-internal method.

Parameters:

error - optional Throwable, if non-null, it'll be attached to the backtrace.

setBackTrace

void setBackTrace(CancellationException backTrace)

Sets a CancellationException describing the stack trace of where the cancellation was initiated. Has no effect if a backtrace was already set, or the given backtrace is null.

This is a framework-internal method.

Parameters:

backTrace - CancellationException to set

setNotCanceled

void setNotCanceled()

Completes this future with a value indicating that the cancellation was not done.