org.droolsassert.util

Class ReentrantFileLock

java.lang.Object

java.util.concurrent.locks.ReentrantLock

org.droolsassert.util.ReentrantFileLock

All Implemented Interfaces:

Serializable, Lock

public class ReentrantFileLock
extends ReentrantLock

Combines ReentrantLock with FileLock
Suitable to synchronize threads from different VMs via file system.

 private static final ReentrantFileLockFactory fileLockFactory = newReentrantFileLockFactory("target/droolsassert/lock");
 private static final ReentrantFileLock consolidatedReportLock = fileLockFactory.newLock(ActivationReportBuilder.class.getName());
 
 
 consolidatedReportLock.lock();
 try {
   ...
 } finally {
   consolidatedReportLock.unlock();
 }
 

See Also:

FileLock, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReentrantFileLock.ReentrantFileLockFactory

Constructor Summary

Constructors

Constructor and Description
ReentrantFileLock(int id, FileChannel lockFileChannel)

Method Summary

Modifier and Type	Method and Description
void	lock()
void	lockInterruptibly()
static ReentrantFileLock.ReentrantFileLockFactory	newReentrantFileLockFactory(File file)
static ReentrantFileLock.ReentrantFileLockFactory	newReentrantFileLockFactory(String filePath)
boolean	tryLock()
boolean	tryLock(long timeout, TimeUnit unit)
void	unlock()

Methods inherited from class java.util.concurrent.locks.ReentrantLock

getHoldCount, getOwner, getQueuedThreads, getQueueLength, getWaitingThreads, getWaitQueueLength, hasQueuedThread, hasQueuedThreads, hasWaiters, isFair, isHeldByCurrentThread, isLocked, newCondition, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ReentrantFileLock

public ReentrantFileLock(int id,
                         FileChannel lockFileChannel)

Method Detail

newReentrantFileLockFactory

public static final ReentrantFileLock.ReentrantFileLockFactory newReentrantFileLockFactory(String filePath)

newReentrantFileLockFactory

public static final ReentrantFileLock.ReentrantFileLockFactory newReentrantFileLockFactory(File file)

lock

public void lock()

Specified by:

lock in interface Lock

Overrides:

lock in class ReentrantLock

lockInterruptibly

public void lockInterruptibly()
                       throws InterruptedException

Specified by:

lockInterruptibly in interface Lock

Overrides:

lockInterruptibly in class ReentrantLock

Throws:

InterruptedException

tryLock

public boolean tryLock()

Specified by:

tryLock in interface Lock

Overrides:

tryLock in class ReentrantLock

tryLock

public boolean tryLock(long timeout,
                       TimeUnit unit)
                throws InterruptedException

Specified by:

tryLock in interface Lock

Overrides:

tryLock in class ReentrantLock

Throws:

InterruptedException

unlock

public void unlock()

Specified by:

unlock in interface Lock

Overrides:

unlock in class ReentrantLock