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NoLock (JBoss Server API) - JBoss 3.2.7 server API Documentation 英文版文档

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org.jboss.ejb.plugins.lock
Class NoLock

java.lang.Object
  org.jboss.ejb.plugins.lock.BeanLockSupport
      org.jboss.ejb.plugins.lock.NoLock

All Implemented Interfaces:

BeanLock, BeanLockExt, org.jboss.util.deadlock.Resource

Direct Known Subclasses:

JDBCOptimisticLock, MethodOnlyEJBLock

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public class NoLock

extends BeanLockSupport

No locking what-so-ever Holds all locks for entity beans, not used for stateful.

All BeanLocks have a reference count. When the reference count goes to 0, the lock is released from the id -> lock mapping.

Version:

$Revision: 1.1.4.2 $

Revisions:

2001/08/08: billb

1. Initial revision

Author:

Bill Burke

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Field Summary

 

Fields inherited from class org.jboss.ejb.plugins.lock.BeanLockSupport

container, id, refs, synched, synchedDepth, tx, txTimeout

 

Constructor Summary

NoLock()

 

Method Summary
void	endInvocation(Invocation mi)           Callback to the BeanLock to inform it that a method invocation has ended.
void	endTransaction(Transaction transaction)           Informs the lock that the given transaction has ended.
void	schedule(Invocation mi)           Schedule(Invocation) Schedule implements a particular policy for scheduling the threads coming in.
void	wontSynchronize(Transaction trasaction)           Signifies to the lock that the transaction will not Synchronize (Tx demarcation not seen).

 

Methods inherited from class org.jboss.ejb.plugins.lock.BeanLockSupport

addRef, attemptSync, getId, getRefs, getResourceHolder, getTransaction, releaseSync, removeRef, setContainer, setId, setTimeout, setTransaction, sync

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

NoLock

public NoLock()

Method Detail

schedule

public void schedule(Invocation mi)
              throws Exception

Schedule(Invocation) Schedule implements a particular policy for scheduling the threads coming in. There is always the spec required "serialization" but we can add custom scheduling in here Synchronizing on lock: a failure to get scheduled must result in a wait() call and a release of the lock. Schedulation must return with lock.

Specified by:

schedule in interface BeanLock

Specified by:

schedule in class BeanLockSupport

Throws:

Exception

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endTransaction

public void endTransaction(Transaction transaction)

Description copied from interface: BeanLock

Informs the lock that the given transaction has ended.

Specified by:

endTransaction in interface BeanLock

Specified by:

endTransaction in class BeanLockSupport

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wontSynchronize

public void wontSynchronize(Transaction trasaction)

Description copied from interface: BeanLock

Signifies to the lock that the transaction will not Synchronize (Tx demarcation not seen).

OSH: This method does not seem to be called from anywhere. What is it meant for? To be called on a timeout before the transaction has terminated?

Specified by:

wontSynchronize in interface BeanLock

Specified by:

wontSynchronize in class BeanLockSupport

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endInvocation

public void endInvocation(Invocation mi)

Description copied from interface: BeanLock

Callback to the BeanLock to inform it that a method invocation has ended. A common use of this method is to release a method lock.

Specified by:

endInvocation in interface BeanLock

Specified by:

endInvocation in class BeanLockSupport

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