org.xnio

Class FinishedIoFuture<T>

java.lang.Object

org.xnio.FinishedIoFuture<T>

Type Parameters:

T - the type of result that this operation produces

All Implemented Interfaces:

Cancellable, IoFuture<T>

public class FinishedIoFuture<T>
extends Object
implements IoFuture<T>

An implementation of IoFuture that represents an immediately-successful operation.

Nested Class Summary

Nested classes/interfaces inherited from interface org.xnio.IoFuture

IoFuture.HandlingNotifier<T,A>, IoFuture.Notifier<T,A>, IoFuture.Status

Constructor Summary

Constructors

Constructor and Description
FinishedIoFuture(T result) Create an instance.

Method Summary

Modifier and Type	Method and Description
<A> IoFuture<T>	addNotifier(IoFuture.Notifier<? super T,A> notifier, A attachment) Add a notifier to be called when this operation is complete.
IoFuture.Status	await() Wait for the operation to complete.
IoFuture.Status	await(long time, TimeUnit timeUnit) Wait for the operation to complete, with a timeout.
IoFuture.Status	awaitInterruptibly() Wait for the operation to complete.
IoFuture.Status	awaitInterruptibly(long time, TimeUnit timeUnit) Wait for the operation to complete, with a timeout.
IoFuture<T>	cancel() Cancel the operation.
T	get() Get the result of the operation.
IOException	getException() Get the failure reason.
T	getInterruptibly() Get the result of the operation.
IoFuture.Status	getStatus() Get the current status.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FinishedIoFuture

public FinishedIoFuture(T result)

Create an instance.

Parameters:

result - the operation result

Method Detail

cancel

public IoFuture<T> cancel()

Cancel the operation. Since this operation is always complete, this is a no-op.

Specified by:

cancel in interface Cancellable

Specified by:

cancel in interface IoFuture<T>

Returns:

this instance

getStatus

public IoFuture.Status getStatus()

Description copied from interface: IoFuture

Get the current status.

Specified by:

getStatus in interface IoFuture<T>

Returns:

the current status

await

public IoFuture.Status await()

Description copied from interface: IoFuture

Wait for the operation to complete. This method will block until the status changes from IoFuture.Status.WAITING.

Specified by:

await in interface IoFuture<T>

Returns:

the new status

await

public IoFuture.Status await(long time,
                             TimeUnit timeUnit)

Description copied from interface: IoFuture

Wait for the operation to complete, with a timeout. This method will block until the status changes from IoFuture.Status.WAITING, or the given time elapses. If the time elapses before the operation is complete, IoFuture.Status.WAITING is returned.

Specified by:

await in interface IoFuture<T>

Parameters:

time - the amount of time to wait

timeUnit - the time unit

Returns:

the new status, or IoFuture.Status.WAITING if the timeout expired

awaitInterruptibly

public IoFuture.Status awaitInterruptibly()
                                   throws InterruptedException

Description copied from interface: IoFuture

Wait for the operation to complete. This method will block until the status changes from IoFuture.Status.WAITING, or the current thread is interrupted.

Specified by:

awaitInterruptibly in interface IoFuture<T>

Returns:

the new status

Throws:

InterruptedException - if the operation is interrupted

awaitInterruptibly

public IoFuture.Status awaitInterruptibly(long time,
                                          TimeUnit timeUnit)
                                   throws InterruptedException

Description copied from interface: IoFuture

Wait for the operation to complete, with a timeout. This method will block until the status changes from IoFuture.Status.WAITING, the given time elapses, or the current thread is interrupted. If the time elapses before the operation is complete, IoFuture.Status.WAITING is returned.

Specified by:

awaitInterruptibly in interface IoFuture<T>

Parameters:

time - the amount of time to wait

timeUnit - the time unit

Returns:

the new status, or IoFuture.Status.WAITING if the timeout expired

Throws:

InterruptedException - if the operation is interrupted

get

public T get()
      throws IOException,
             CancellationException

Description copied from interface: IoFuture

Get the result of the operation. If the operation is not complete, blocks until the operation completes. If the operation fails, or has already failed at the time this method is called, the failure reason is thrown.

Specified by:

get in interface IoFuture<T>

Returns:

the result of the operation

Throws:

IOException - if the operation failed

CancellationException - if the operation was cancelled

getInterruptibly

public T getInterruptibly()
                   throws IOException,
                          InterruptedException,
                          CancellationException

Description copied from interface: IoFuture

Get the result of the operation. If the operation is not complete, blocks until the operation completes. If the operation fails, or has already failed at the time this method is called, the failure reason is thrown. If the current thread is interrupted while waiting, an exception is thrown.

Specified by:

getInterruptibly in interface IoFuture<T>

Returns:

the result of the operation

Throws:

IOException - if the operation failed

InterruptedException - if the operation is interrupted

CancellationException - if the operation was cancelled

getException

public IOException getException()
                         throws IllegalStateException

Description copied from interface: IoFuture

Get the failure reason.

Specified by:

getException in interface IoFuture<T>

Returns:

the failure reason

Throws:

IllegalStateException - if the operation did not fail

addNotifier

public <A> IoFuture<T> addNotifier(IoFuture.Notifier<? super T,A> notifier,
                                   A attachment)

Description copied from interface: IoFuture

Add a notifier to be called when this operation is complete. If the operation is already complete, the notifier is called immediately, possibly in the caller's thread. The given attachment is provided to the notifier.

Specified by:

addNotifier in interface IoFuture<T>

Type Parameters:

A - the attachment type

Parameters:

notifier - the notifier to be called

attachment - the attachment to pass in to the notifier

Returns:

this instance