org.apache.commons.transaction.locking
Class SimpleLockManager<K,M>

java.lang.Object
  org.apache.commons.transaction.locking.AbstractLockManager<K,M>
      org.apache.commons.transaction.locking.SimpleLockManager<K,M>

All Implemented Interfaces:

LockManager<K,M>

public class SimpleLockManager<K,M>
extends AbstractLockManager<K,M>
implements LockManager<K,M>

Default implementation of LockManager based on ReentrantLock.

This is a minimal implementation that only knows a single type of lock. Read-/Write-locks are not supported. Deadlock detection is not performed. Transferring locks between threads is not possible. These limitations are due to the standard Lock and ReadWriteLock implementations.

This implementation is thread-safe.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.transaction.locking.AbstractLockManager

AbstractLockManager.KeyEntry<K,M>

Field Summary

protected ConcurrentHashMap<AbstractLockManager.KeyEntry<K,M>,ReentrantLock>

allLocks

Fields inherited from class org.apache.commons.transaction.locking.AbstractLockManager

effectiveGlobalTimeouts, locksForThreads

Constructor Summary

SimpleLockManager()

Method Summary

protected ReentrantLock	create()
protected boolean	hasTimedOut(Thread thread)
protected void	release()
protected void	reportTimeout(Thread thread)
protected boolean	tryLockInternal(M resourceManager, K key, boolean exclusive, long time, TimeUnit unit)

Methods inherited from class org.apache.commons.transaction.locking.AbstractLockManager

checkIsStarted, computeRemainingTime, endWork, isWorking, lock, startWork, tryLock

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.commons.transaction.locking.LockManager

endWork, lock, startWork, tryLock

Field Detail

allLocks

protected ConcurrentHashMap<AbstractLockManager.KeyEntry<K,M>,ReentrantLock> allLocks

Constructor Detail

SimpleLockManager

public SimpleLockManager()

Method Detail

create

protected ReentrantLock create()

tryLockInternal

protected boolean tryLockInternal(M resourceManager,
                                  K key,
                                  boolean exclusive,
                                  long time,
                                  TimeUnit unit)
                           throws LockException

Specified by:

tryLockInternal in class AbstractLockManager<K,M>

Throws:

LockException

reportTimeout

protected void reportTimeout(Thread thread)
                      throws LockException

Overrides:

reportTimeout in class AbstractLockManager<K,M>

Throws:

LockException

hasTimedOut

protected boolean hasTimedOut(Thread thread)

Overrides:

hasTimedOut in class AbstractLockManager<K,M>

release

protected void release()

Specified by:

release in class AbstractLockManager<K,M>