uk.ac.soton.itinnovation.grid.service.sla.dao
Class DatabaseLocker

java.lang.Object
  uk.ac.soton.itinnovation.grid.service.sla.dao.DatabaseLocker

All Implemented Interfaces:

Locker

public class DatabaseLocker
extends Object
implements Locker

Constructor Summary

protected

DatabaseLocker()

Method Summary

Object	pessimisticLock(Class entityClass, Serializable id)
void	unlock(Class entityClass, Serializable id) This method removes a lock.
void	unlockAll() This method unlocks all entities that were locked with pessimisticLock by the current thread.

Methods inherited from class java.lang.Object

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

Constructor Detail

DatabaseLocker

protected DatabaseLocker()

Method Detail

pessimisticLock

public Object pessimisticLock(Class entityClass,
                              Serializable id)

Specified by:

pessimisticLock in interface Locker

unlock

public void unlock(Class entityClass,
                   Serializable id)

Description copied from interface: Locker

This method removes a lock. Implemenatations should unlock only if the current thread is the owning thread. The owning thread is thread that originally obtained the lock.

Furthermore, implemenations should be tolerant of client errors and therefore must not throw runtime exceptions.

Specified by:

unlock in interface Locker

unlockAll

public void unlockAll()

Description copied from interface: Locker

This method unlocks all entities that were locked with pessimisticLock by the current thread. Only the locking thread can unlock.

Specified by:

unlockAll in interface Locker