org.jgroups.util

Class NullFuture<T>

java.lang.Object

org.jgroups.util.NullFuture<T>

All Implemented Interfaces:

java.util.concurrent.Future<T>, NotifyingFuture<T>

public class NullFuture<T>
extends java.lang.Object
implements NotifyingFuture<T>

Author:

Bela Ban

Constructor Summary

Constructors

Constructor and Description
NullFuture(T retval)

Method Summary

Modifier and Type	Method and Description
boolean	cancel(boolean mayInterruptIfRunning)
T	get()
T	get(long timeout, java.util.concurrent.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

Constructor Detail

NullFuture

public NullFuture(T retval)

Method Detail

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface java.util.concurrent.Future<T>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface java.util.concurrent.Future<T>

isDone

public boolean isDone()

Specified by:

isDone in interface java.util.concurrent.Future<T>

get

public T get()
      throws java.lang.InterruptedException,
             java.util.concurrent.ExecutionException

Specified by:

get in interface java.util.concurrent.Future<T>

Throws:

java.lang.InterruptedException

java.util.concurrent.ExecutionException

get

public T get(long timeout,
             java.util.concurrent.TimeUnit unit)
      throws java.lang.InterruptedException,
             java.util.concurrent.ExecutionException,
             java.util.concurrent.TimeoutException

Specified by:

get in interface java.util.concurrent.Future<T>

Throws:

java.lang.InterruptedException

java.util.concurrent.ExecutionException

java.util.concurrent.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