Package org.jgroups.util

Class NullFuture<T>

java.lang.Object

org.jgroups.util.NullFuture<T>

All Implemented Interfaces:

Future<T>, NotifyingFuture<T>

public class NullFuture<T>
extends Object
implements NotifyingFuture<T>

Author:

Bela Ban

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.concurrent.Future

Future.State

Constructor Summary

Constructors

Constructor	Description
NullFuture(T retval)

Method Summary

Modifier and Type	Method	Description
boolean	cancel(boolean mayInterruptIfRunning)
T	get()
T	get(long timeout, TimeUnit unit)
boolean	isCancelled()
boolean	isDone()
NotifyingFuture	setListener(FutureListener<T> listener)	Attaches a listener and returns the same future instance, to allow for 'building' futures.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.concurrent.Future

exceptionNow, resultNow, state

Constructor Details

NullFuture

public NullFuture(T retval)

Method Details

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<T>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface Future<T>

isDone

public boolean isDone()

Specified by:

isDone in interface Future<T>

get

public T get()
      throws InterruptedException,
ExecutionException

Specified by:

get in interface Future<T>

Throws:

InterruptedException

ExecutionException

get

public T get(long timeout,
 TimeUnit unit)
      throws InterruptedException,
ExecutionException,
TimeoutException

Specified by:

get in interface Future<T>

Throws:

InterruptedException

ExecutionException

TimeoutException

setListener

public NotifyingFuture setListener(FutureListener<T> listener)

Description copied from interface: NotifyingFuture

Attaches a listener and returns the same future instance, to allow for 'building' futures.

Specified by:

setListener in interface NotifyingFuture<T>

Parameters:

listener - listener to attach

Returns:

the same future instance