JBoss API: Class BeanLockSupport

org.jboss.ejb.plugins.lock
Class BeanLockSupport

java.lang.Object
  |
  +--org.jboss.ejb.plugins.lock.BeanLockSupport

All Implemented Interfaces:

BeanLock

Direct Known Subclasses:

QueuedPessimisticEJBLock, SimplePessimisticEJBLock

public abstract class BeanLockSupport

extends java.lang.Object

implements BeanLock

Support for the BeanLock

Version:

$Revision: 1.4.4.4 $

Revisions:

2001/07/29: marcf

1. Initial revision

Author:

Bill Burke, Marc Fleury

Field Summary

protected java.lang.Object	id The Cachekey corresponding to this Bean
protected int	numMethodLocks Number of threads invoking methods on this bean (1 normally >1 if reentrant)
protected boolean	reentrant Are reentrant calls allowed?
protected int	refs Number of threads that retrieved this lock from the manager (0 means removing)
protected boolean	synched
protected javax.transaction.Transaction	tx
protected int	txTimeout
protected static java.util.HashMap	waiting

Constructor Summary

BeanLockSupport()

Method Summary

void	addMethodLock()
void	addRef()
void	deadlockDetection(javax.transaction.Transaction miTx)
abstract void	endTransaction(javax.transaction.Transaction tx)
java.lang.Object	getId()
int	getNumMethodLocks()
int	getRefs()
javax.transaction.Transaction	getTransaction()
protected boolean	isCallAllowed(MethodInvocation mi)
boolean	isMethodLocked()
abstract void	releaseMethodLock() releaseMethodLock if we reach the count of zero it means the instance is free from threads (and reentrency) we wake up the next thread in the currentLock
void	releaseSync()
void	removeRef()
abstract void	schedule(MethodInvocation mi)
void	setId(java.lang.Object id)
void	setReentrant(boolean reentrant)
void	setTimeout(int timeout)
void	setTransaction(javax.transaction.Transaction tx) The setTransaction associates a transaction with the lock.
void	sync()
abstract void	wontSynchronize(javax.transaction.Transaction tx)

Methods inherited from class java.lang.Object

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

Field Detail

numMethodLocks

protected int numMethodLocks

Number of threads invoking methods on this bean (1 normally >1 if reentrant)

refs

protected int refs

Number of threads that retrieved this lock from the manager (0 means removing)

id

protected java.lang.Object id

The Cachekey corresponding to this Bean

reentrant

protected boolean reentrant

Are reentrant calls allowed?

tx

protected javax.transaction.Transaction tx

synched

protected boolean synched

txTimeout

protected int txTimeout

waiting

protected static java.util.HashMap waiting

Constructor Detail

BeanLockSupport

public BeanLockSupport()

Method Detail

setId

public void setId(java.lang.Object id)

Specified by:

setId in interface BeanLock

getId

public java.lang.Object getId()

Specified by:

getId in interface BeanLock

setReentrant

public void setReentrant(boolean reentrant)

Specified by:

setReentrant in interface BeanLock

setTimeout

public void setTimeout(int timeout)

Specified by:

setTimeout in interface BeanLock

sync

public void sync()

Specified by:

sync in interface BeanLock

releaseSync

public void releaseSync()

Specified by:

releaseSync in interface BeanLock

schedule

public abstract void schedule(MethodInvocation mi)
                       throws java.lang.Exception

Specified by:

schedule in interface BeanLock

setTransaction

public void setTransaction(javax.transaction.Transaction tx)

The setTransaction associates a transaction with the lock. The current transaction is associated by the schedule call.

Specified by:

setTransaction in interface BeanLock

getTransaction

public javax.transaction.Transaction getTransaction()

Specified by:

getTransaction in interface BeanLock

endTransaction

public abstract void endTransaction(javax.transaction.Transaction tx)

Specified by:

endTransaction in interface BeanLock

wontSynchronize

public abstract void wontSynchronize(javax.transaction.Transaction tx)

Specified by:

wontSynchronize in interface BeanLock

isMethodLocked

public boolean isMethodLocked()

Specified by:

isMethodLocked in interface BeanLock

getNumMethodLocks

public int getNumMethodLocks()

Specified by:

getNumMethodLocks in interface BeanLock

addMethodLock

public void addMethodLock()

Specified by:

addMethodLock in interface BeanLock

releaseMethodLock

public abstract void releaseMethodLock()

Description copied from interface: BeanLock

releaseMethodLock if we reach the count of zero it means the instance is free from threads (and reentrency) we wake up the next thread in the currentLock

Specified by:

releaseMethodLock in interface BeanLock

addRef

public void addRef()

Specified by:

addRef in interface BeanLock

removeRef

public void removeRef()

Specified by:

removeRef in interface BeanLock

getRefs

public int getRefs()

Specified by:

getRefs in interface BeanLock

isCallAllowed

protected boolean isCallAllowed(MethodInvocation mi)

deadlockDetection

public void deadlockDetection(javax.transaction.Transaction miTx)
                       throws ApplicationDeadlockException