org.jboss.cache.util.concurrent.locks
Class OwnableReentrantSharedLockContainer<E>

java.lang.Object
  org.jboss.cache.util.concurrent.locks.AbstractSharedLockContainer<E>
      org.jboss.cache.util.concurrent.locks.OwnableReentrantSharedLockContainer<E>

All Implemented Interfaces:

LockContainer<E>

@ThreadSafe
public class OwnableReentrantSharedLockContainer<E>
extends AbstractSharedLockContainer<E>

A LockContainer that holds OwnableReentrantLocks.

Since:

3.0

Author:

Manik Surtani (manik AT jboss DOT org)

See Also:

ReentrantSharedLockContainer, OwnableReentrantLock

Constructor Summary

OwnableReentrantSharedLockContainer(int concurrencyLevel, InvocationContextContainer icc)
Creates a new LockContainer which uses a certain number of shared locks across all elements that need to be locked.

Method Summary

OwnableReentrantLock	getLock(E object)
int	getNumLocksHeld()
protected void	initLocks(int numLocks)
boolean	isLocked(E object)
boolean	ownsLock(E object, Object owner) Tests if a give owner owns a lock on a specified object.
void	reset() Clears all locks held and re-initialises stripes.
int	size()
String	toString()

Methods inherited from class org.jboss.cache.util.concurrent.locks.AbstractSharedLockContainer

acquireLock, acquireLock, calculateNumberOfSegments, releaseLock

Methods inherited from class java.lang.Object

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

Constructor Detail

OwnableReentrantSharedLockContainer

public OwnableReentrantSharedLockContainer(int concurrencyLevel,
                                           InvocationContextContainer icc)

Creates a new LockContainer which uses a certain number of shared locks across all elements that need to be locked.

Parameters:

concurrencyLevel - concurrency level for number of stripes to create. Stripes are created in powers of two, with a minimum of concurrencyLevel created.

icc - invocation context container to use

Method Detail

initLocks

protected void initLocks(int numLocks)

Specified by:

initLocks in class AbstractSharedLockContainer<E>

getLock

public final OwnableReentrantLock getLock(E object)

Parameters:

object - object

Returns:

the lock for a specific object

ownsLock

public final boolean ownsLock(E object,
                              Object owner)

Description copied from interface: LockContainer

Tests if a give owner owns a lock on a specified object.

Parameters:

object - object to check

owner - owner to test

Returns:

true if owner owns lock, false otherwise

isLocked

public final boolean isLocked(E object)

Parameters:

object - object

Returns:

true if an object is locked, false otherwise

getNumLocksHeld

public final int getNumLocksHeld()

Returns:

number of locks held

toString

public String toString()

Overrides:

toString in class Object

reset

public void reset()

Description copied from interface: LockContainer

Clears all locks held and re-initialises stripes.

size

public int size()