Package net.sf.ehcache.concurrent

Class ReadWriteLockSync

java.lang.Object

net.sf.ehcache.concurrent.ReadWriteLockSync

All Implemented Interfaces:

Sync

public class ReadWriteLockSync
extends java.lang.Object
implements Sync

A simple ReadWriteLock synchronizer.

Author:

Alex Snaps

Field Summary

Fields inherited from interface net.sf.ehcache.concurrent.Sync

ONE_CENTURY, ONE_DAY, ONE_HOUR, ONE_MINUTE, ONE_SECOND, ONE_WEEK, ONE_YEAR

Constructor Summary

Constructors

Constructor	Description
ReadWriteLockSync()	default constructor.
ReadWriteLockSync(java.util.concurrent.locks.ReentrantReadWriteLock lock)	Constructor.

Method Summary

Modifier and Type	Method	Description
java.util.concurrent.locks.ReadWriteLock	getReadWriteLock()	Gets the ReadWriteLock backing this sync.
boolean	isHeldByCurrentThread(LockType type)	Returns true is this is lock is held at given level by the current thread.
void	lock(LockType type)	Acquire lock of LockType.READ or WRITE
boolean	tryLock(LockType type, long msec)	Tries to acquire a LockType.READ or WRITE for a certain period
void	unlock(LockType type)	Releases the lock held by the current Thread.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadWriteLockSync

public ReadWriteLockSync()

default constructor.

ReadWriteLockSync

public ReadWriteLockSync(java.util.concurrent.locks.ReentrantReadWriteLock lock)

Constructor.

Parameters:

lock -

Method Detail

lock

public void lock(LockType type)

Acquire lock of LockType.READ or WRITE

Specified by:

lock in interface Sync

Parameters:

type - the lock type to acquire

tryLock

public boolean tryLock(LockType type,
                       long msec)
                throws java.lang.InterruptedException

Tries to acquire a LockType.READ or WRITE for a certain period

Specified by:

tryLock in interface Sync

Parameters:

type - the lock type to acquire

msec - timeout

Returns:

true if the lock got acquired, false otherwise

Throws:

java.lang.InterruptedException - Should the thread be interrupted

unlock

public void unlock(LockType type)

Releases the lock held by the current Thread. In case of a LockType.WRITE, should the lock not be held by the current Thread, nothing happens

Specified by:

unlock in interface Sync

Parameters:

type - the lock type to acquire

getReadWriteLock

public java.util.concurrent.locks.ReadWriteLock getReadWriteLock()

Gets the ReadWriteLock backing this sync.

Returns:

the backing ReadWriteLock

isHeldByCurrentThread

public boolean isHeldByCurrentThread(LockType type)

Returns true is this is lock is held at given level by the current thread.

Specified by:

isHeldByCurrentThread in interface Sync

Parameters:

type - the lock type to test

Returns:

true if the lock is held