com.amazonaws.services.s3.transfer.internal.future

Class DelegatingFuture<T>

java.lang.Object

com.amazonaws.services.s3.transfer.internal.future.DelegatingFuture<T>

All Implemented Interfaces:

Future<T>

public class DelegatingFuture<T>
extends Object
implements Future<T>

An implementation of Future that delegates all operations to another future. The delegate future does not need to be specified when the FutureFuture is created. In the event that this Future is cancelled before the delegate is assigned, the delegate will be cancelled at the time of assignment.

Constructor Summary

Constructors

Constructor and Description
DelegatingFuture()

Method Summary

Modifier and Type	Method and Description
boolean	cancel(boolean mayInterruptIfRunning)
T	get()
T	get(long timeout, TimeUnit unit)
boolean	isCancelled()
boolean	isDone()
void	setDelegate(Future<T> delegate) Set the delegate, throwing an exception if it has already been set.
void	setDelegateIfUnset(Future<T> delegate) Set the delegate, if it hasn't been set already.

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingFuture

public DelegatingFuture()

Method Detail

setDelegateIfUnset

public void setDelegateIfUnset(Future<T> delegate)

Set the delegate, if it hasn't been set already. If it has been set, this does nothing.

setDelegate

public void setDelegate(Future<T> delegate)

Set the delegate, throwing an exception if it has already been set.

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