biz.onixs.fix.engine.util

Class Semaphore

java.lang.Object

biz.onixs.fix.engine.util.Semaphore

public class Semaphore
extends Object

Implementation of Dijkstra's counting semaphore in java.

Constructor Summary

Constructors

Constructor and Description
Semaphore(int count) Create a Semaphore.

Method Summary

Modifier and Type	Method and Description
void	acquire() Acquire the Semaphore.
void	acquire(long timeOut) Acquire the Semaphore.
void	release() Release the Semaphore.
boolean	tryAcquire(long timeOut) Acquire the Semaphore.

Methods inherited from class java.lang.Object

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

Constructor Detail

Semaphore

public Semaphore(int count)

Create a Semaphore.

Parameters:

count - semaphore count

Method Detail

acquire

public void acquire()
             throws InterruptedException

Acquire the Semaphore. Note that this will block.

Throws:

InterruptedException - exception during wait

acquire

public void acquire(long timeOut)
             throws TimeoutException,
                    InterruptedException

Acquire the Semaphore. Note that the call will return if timeout amount of time expires.

Parameters:

timeOut - amount of time (millis) to wait before returning (unless operation completes before)

Throws:

TimeoutException - wait timed out exception

InterruptedException - exception during wait

tryAcquire

public boolean tryAcquire(long timeOut)
                   throws InterruptedException

Acquire the Semaphore. Note that the call will return if timeout amount of time expires.

Parameters:

timeOut - amount of time (millis) to wait before returning (unless operation completes before)

Returns:

true if the semaphore acquired, false if timeout occurred

Throws:

InterruptedException - exception during wait

release

public void release()

Release the Semaphore.