org.jboss.cache.util.concurrent.locks

Class PerElementLockContainer<E>

java.lang.Object

org.jboss.cache.util.concurrent.locks.PerElementLockContainer<E>

All Implemented Interfaces:

LockContainer<E>

Direct Known Subclasses:

PerElementOwnableReentrantLockContainer, PerElementReentrantLockContainer

public abstract class PerElementLockContainer<E>
extends Object
implements LockContainer<E>

A lock container that maintains a new lock per element

Since:

3.1.0

Author:

Manik Surtani

Field Summary

Fields

Modifier and Type	Field and Description
protected ConcurrentMap<E,Lock>	locks

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PerElementLockContainer(int concurrencyLevel)

Method Summary

Methods

Modifier and Type	Method and Description
void	acquireLock(E object)
boolean	acquireLock(E object, long timeout, TimeUnit unit)
Lock	getLock(E object)
int	getNumLocksHeld()
protected abstract Lock	newLock()
void	releaseLock(E object)
void	reset() Clears all locks held and re-initialises stripes.
int	size()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jboss.cache.util.concurrent.locks.LockContainer

isLocked, ownsLock

Field Detail

locks

protected final ConcurrentMap<E,Lock> locks

Constructor Detail

PerElementLockContainer

protected PerElementLockContainer(int concurrencyLevel)

Method Detail

newLock

protected abstract Lock newLock()

getLock

public final Lock getLock(E object)

Specified by:

getLock in interface LockContainer<E>

Parameters:

object - object

Returns:

the lock for a specific object

getNumLocksHeld

public int getNumLocksHeld()

Specified by:

getNumLocksHeld in interface LockContainer<E>

Returns:

number of locks held

reset

public void reset()

Description copied from interface: LockContainer

Clears all locks held and re-initialises stripes.

Specified by:

reset in interface LockContainer<E>

size

public int size()

Specified by:

size in interface LockContainer<E>

acquireLock

public void acquireLock(E object)

Specified by:

acquireLock in interface LockContainer<E>

acquireLock

public boolean acquireLock(E object,
                  long timeout,
                  TimeUnit unit)
                    throws InterruptedException

Specified by:

acquireLock in interface LockContainer<E>

Throws:

InterruptedException

releaseLock

public void releaseLock(E object)

Specified by:

releaseLock in interface LockContainer<E>