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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » server » org.jboss.ejb 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.jboss.ejb.BeanLock

BeanLock
public interface BeanLock (Code)
BeanLock interface
author:
   Bill Burke
author:
   Marc Fleury
version:
   $Revision: 57209 $
version:
  

Revisions:

version:
  

2001/07/29: marcf
version:
  


    version:
      
  1. Initial revision
    version:
      

version:
  

20010802: marcf
version:
  


    version:
      
  1. Moved to a pluggable framework for the locking policies
    version:
      
  2. you specify in jboss.xml what locking-policy you want, eg. pessimistic/optimistic
    version:
      
  3. The BeanLock is now an interface and implementations can be found under ejb/plugins/lock
    version:
      




Method Summary
public  voidaddRef()
     Increment the reference count of this lock.
public  voidendInvocation(Invocation mi)
     Callback to the BeanLock to inform it that a method invocation has ended.
public  voidendTransaction(Transaction tx)
     Informs the lock that the given transaction has ended.
public  ObjectgetId()
     Get the bean instance cache id for the bean we are locking for.
public  intgetRefs()
     Get the current reference count of this lock.
public  TransactiongetTransaction()
     Get the transaction currently associated with this lock.
public  voidreleaseSync()
     Release exclusive access to this lock instance.
public  voidremoveRef()
     Decrement the reference count of this lock.
public  voidschedule(Invocation mi)
     This method implements the actual logic of the lock.
public  voidsetContainer(Container container)
     set the ejb container of this lock.
public  voidsetId(Object id)
     Set the bean instance cache id for the bean we are locking for.
public  voidsetTimeout(int timeout)
     Change long we should wait for a lock.
public  voidsetTransaction(Transaction tx)
     Set the transaction currently associated with this lock.
public  voidsync()
     Obtain exclusive access to this lock instance.
public  voidwontSynchronize(Transaction tx)
     Signifies to the lock that the transaction will not Synchronize (Tx demarcation not seen).



Method Detail
addRef
public void addRef()(Code)
Increment the reference count of this lock.



endInvocation
public void endInvocation(Invocation mi)(Code)
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.



endTransaction
public void endTransaction(Transaction tx)(Code)
Informs the lock that the given transaction has ended.
Parameters:
  tx - The transaction that has ended.



getId
public Object getId()(Code)
Get the bean instance cache id for the bean we are locking for. The cache key for the bean instance we are locking for.



getRefs
public int getRefs()(Code)
Get the current reference count of this lock. The current reference count.



getTransaction
public Transaction getTransaction()(Code)
Get the transaction currently associated with this lock. The transaction currently associated with this lock,or null if no transaction is currentlyassociated with this lock.



releaseSync
public void releaseSync()(Code)
Release exclusive access to this lock instance.



removeRef
public void removeRef()(Code)
Decrement the reference count of this lock.



schedule
public void schedule(Invocation mi) throws Exception(Code)
This method implements the actual logic of the lock. In the case of an EJB lock it must at least implement the serialization of calls
Parameters:
  mi - The method invocation that needs a lock.



setContainer
public void setContainer(Container container)(Code)
set the ejb container of this lock.



setId
public void setId(Object id)(Code)
Set the bean instance cache id for the bean we are locking for.
Parameters:
  id - The cache key for the bean instance we are locking for.



setTimeout
public void setTimeout(int timeout)(Code)
Change long we should wait for a lock.



setTransaction
public void setTransaction(Transaction tx)(Code)
Set the transaction currently associated with this lock. The current transaction is associated by the schedule call.
Parameters:
  tx - The transaction to associate with this lock.



sync
public void sync()(Code)
Obtain exclusive access to this lock instance.



wontSynchronize
public void wontSynchronize(Transaction tx)(Code)
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?




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