JBoss API: Class Semaphore

org.jboss.util
Class Semaphore

java.lang.Object
  |
  +--org.jboss.util.Semaphore
All Implemented Interfaces:
Sync
Direct Known Subclasses:
BeanSemaphore, WaitSemaphore

public class Semaphore
extends java.lang.Object
implements Sync

Semaphore that can allow a specified number of threads to enter, blocking the others. If the specified number of threads is 1, it acts as an exclusive semaphore and can be used instead of synchronized blocks

Version:
$Revision: 1.2.4.1 $
Author:
Simone Bordet (simone.bordet@compaq.com)

Constructor Summary
Semaphore(int allowed)
           
 
Method Summary
 void acquire()
          Acquires this sync
 int getUsers()
           
protected  void logAcquire()
           
protected  void logDeadlock()
           
protected  void logRelease()
           
 void release()
          Releases this sync
 java.lang.String toString()
           
protected  boolean waitImpl(java.lang.Object lock)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Semaphore

public Semaphore(int allowed)
Method Detail

getUsers

public int getUsers()

acquire

public void acquire()
             throws java.lang.InterruptedException
Description copied from interface: Sync
Acquires this sync
Specified by:
acquire in interface Sync
Following copied from interface: org.jboss.util.Sync
See Also:
Sync.release()

release

public void release()
Description copied from interface: Sync
Releases this sync
Specified by:
release in interface Sync
Following copied from interface: org.jboss.util.Sync
See Also:
Sync.acquire()

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

waitImpl

protected boolean waitImpl(java.lang.Object lock)
                    throws java.lang.InterruptedException

logAcquire

protected void logAcquire()

logDeadlock

protected void logDeadlock()

logRelease

protected void logRelease()


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