net.sf.hajdbc.util.concurrent

Class SemaphoreLock

java.lang.Object

net.sf.hajdbc.util.concurrent.SemaphoreLock

All Implemented Interfaces:

java.util.concurrent.locks.Lock

public class SemaphoreLock
extends java.lang.Object
implements java.util.concurrent.locks.Lock

An implementation of Lock using a binary semaphore. Unlike the ReentrantLock this lock can be locked and unlocked by different threads. Conditions are not supported.

Author:

Paul Ferraro

Constructor Summary

Constructors

Constructor and Description
SemaphoreLock(boolean fair)

Method Summary

Modifier and Type	Method and Description
void	lock()
void	lockInterruptibly()
java.util.concurrent.locks.Condition	newCondition()
boolean	tryLock()
boolean	tryLock(long time, java.util.concurrent.TimeUnit unit)
void	unlock()

Methods inherited from class java.lang.Object

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

Constructor Detail

SemaphoreLock

public SemaphoreLock(boolean fair)

Method Detail

lock

public void lock()

Specified by:

lock in interface java.util.concurrent.locks.Lock

See Also:

Lock.lock()

lockInterruptibly

public void lockInterruptibly()
                       throws java.lang.InterruptedException

Specified by:

lockInterruptibly in interface java.util.concurrent.locks.Lock

Throws:

java.lang.InterruptedException

See Also:

Lock.lockInterruptibly()

newCondition

public java.util.concurrent.locks.Condition newCondition()

Specified by:

newCondition in interface java.util.concurrent.locks.Lock

See Also:

Lock.newCondition()

tryLock

public boolean tryLock()

Specified by:

tryLock in interface java.util.concurrent.locks.Lock

See Also:

Lock.tryLock()

tryLock

public boolean tryLock(long time,
                       java.util.concurrent.TimeUnit unit)
                throws java.lang.InterruptedException

Specified by:

tryLock in interface java.util.concurrent.locks.Lock

Throws:

java.lang.InterruptedException

See Also:

Lock.tryLock(long, java.util.concurrent.TimeUnit)

unlock

public void unlock()

Specified by:

unlock in interface java.util.concurrent.locks.Lock

See Also:

Lock.unlock()