org.jboss.ejb.plugins.lock
Class NonReentrantLock

java.lang.Object
  org.jboss.ejb.plugins.lock.NonReentrantLock

All Implemented Interfaces:

org.jboss.util.deadlock.Resource

public class NonReentrantLock
extends Object
implements org.jboss.util.deadlock.Resource

Implementents a non reentrant lock with deadlock detection

It will throw a ReentranceException if the same thread tries to acquire twice or the same transaction tries to acquire twice

Version:

$Revision: 57209 $

Author:

Bill Burke, Alexey Loubyansky

Nested Class Summary

static class

NonReentrantLock.ReentranceException

Field Summary

protected int	held
protected Transaction	holdingTx
protected Object	lock
protected Thread	lockHolder

Constructor Summary

NonReentrantLock()

Method Summary

protected boolean	acquireNonReentrant(long waitTime, Transaction miTx)
protected boolean	acquireReentrant(long waitTime, Transaction miTx)
boolean	attempt(long waitTime, Transaction miTx, boolean nonReentrant)
Object	getResourceHolder()
void	release(boolean nonReentrant)

Methods inherited from class java.lang.Object

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

Field Detail

lockHolder

protected Thread lockHolder

lock

protected Object lock

held

protected volatile int held

holdingTx

protected Transaction holdingTx

Constructor Detail

NonReentrantLock

public NonReentrantLock()

Method Detail

getResourceHolder

public Object getResourceHolder()

Specified by:

getResourceHolder in interface org.jboss.util.deadlock.Resource

acquireNonReentrant

protected boolean acquireNonReentrant(long waitTime,
                                      Transaction miTx)
                               throws org.jboss.util.deadlock.ApplicationDeadlockException,
                                      InterruptedException,
                                      NonReentrantLock.ReentranceException

Throws:

org.jboss.util.deadlock.ApplicationDeadlockException

InterruptedException

NonReentrantLock.ReentranceException

acquireReentrant

protected boolean acquireReentrant(long waitTime,
                                   Transaction miTx)
                            throws org.jboss.util.deadlock.ApplicationDeadlockException,
                                   InterruptedException,
                                   NonReentrantLock.ReentranceException

Throws:

org.jboss.util.deadlock.ApplicationDeadlockException

InterruptedException

NonReentrantLock.ReentranceException

attempt

public boolean attempt(long waitTime,
                       Transaction miTx,
                       boolean nonReentrant)
                throws org.jboss.util.deadlock.ApplicationDeadlockException,
                       InterruptedException,
                       NonReentrantLock.ReentranceException

Throws:

org.jboss.util.deadlock.ApplicationDeadlockException

InterruptedException

NonReentrantLock.ReentranceException

release

public void release(boolean nonReentrant)