Class FutureLockImpl<R>

java.lang.Object

com.google.code.yanf4j.core.impl.FutureLockImpl<R>

All Implemented Interfaces:

Future<R>

public class FutureLockImpl<R>
extends Object
implements Future<R>

Simple Future implementation, which uses ReentrantLock to synchronize during the lifecycle.

See Also:

• Future
• ReentrantLock

Nested Class Summary

Nested classes/interfaces inherited from interface Future

Future.State

Field Summary

Fields

Modifier and Type	Field	Description
private Throwable	failure
private boolean	isCancelled
private boolean	isDone
private CountDownLatch	latch
private final ReentrantLock	lock
protected R	result

Constructor Summary

Constructors

Constructor	Description
FutureLockImpl()
FutureLockImpl(ReentrantLock lock)

Method Summary

Modifier and Type	Method	Description
boolean	cancel(boolean mayInterruptIfRunning)
void	failure(Throwable failure)	Notify about the failure, occured during asynchronous operation execution.
R	get()
R	get(long timeout, TimeUnit unit)
R	getResult()	Get current result value without any blocking.
boolean	isCancelled()
boolean	isDone()
protected void	notifyHaveResult()	Notify blocked listeners threads about operation completion.
void	setResult(R result)	Set the result value and notify about operation completion.

Methods inherited from class Object

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

Methods inherited from interface Future

exceptionNow, resultNow, state

Field Details

lock

private final ReentrantLock lock

isDone

private boolean isDone

latch

private CountDownLatch latch

isCancelled

private boolean isCancelled

failure

private Throwable failure

result

protected R result

Constructor Details

FutureLockImpl

public FutureLockImpl()

FutureLockImpl

public FutureLockImpl(ReentrantLock lock)

Method Details

getResult

public R getResult()

Get current result value without any blocking.

Returns:

current result value without any blocking.

setResult

public void setResult(R result)

Set the result value and notify about operation completion.

Parameters:

result - the result value

cancel

public boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<R>

isCancelled

public boolean isCancelled()

Specified by:

isCancelled in interface Future<R>

isDone

public boolean isDone()

Specified by:

isDone in interface Future<R>

get

public R get()
      throws InterruptedException,
ExecutionException

Specified by:

get in interface Future<R>

Throws:

InterruptedException

ExecutionException

get

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

Specified by:

get in interface Future<R>

Throws:

InterruptedException

ExecutionException

TimeoutException

failure

public void failure(Throwable failure)

Notify about the failure, occured during asynchronous operation execution.

Parameters:

failure -

notifyHaveResult

protected void notifyHaveResult()

Notify blocked listeners threads about operation completion.