goodsjpi
Class PessimisticMetaobject

java.lang.Object
  |
  +--goodsjpi.Metaobject
        |
        +--goodsjpi.BasicMetaobject
              |
              +--goodsjpi.PessimisticMetaobject

Direct Known Subclasses:

PessimisticRepeatableReadMetaobject

public class PessimisticMetaobject

extends BasicMetaobject

PessimisticMetaobject for pessimistic scheme of synchronization.
Or would it be realistic.
Or Multiple Reader, one writer.

Field Summary

Fields inherited from class goodsjpi.Metaobject

CONSTRUCTOR, EXCEPTION, MUTATOR, VARIABLE

Constructor Summary

PessimisticMetaobject()

Method Summary

void	beginReadAccess(goodsjpi.Persistent obj) beginReadAccess is a no-op.
void	beginWriteAccess(goodsjpi.Persistent obj) beginWriteAccess locks the object.
void	endAccess(goodsjpi.Persistent obj) endAccess adds the object to the cahce managers transaction list

Methods inherited from class goodsjpi.BasicMetaobject

abortTransaction, abortTransaction, beginNestedTransaction, commitObjectChanges, commitTransaction, destroyObject, endNestedTransaction, forgetObject, invalidateObject, loadObject, makePersistent, notifyOnModification, postDaemon, preDaemon, preloadObject, releaseObject, sendForgottenObjectsToServers, undoObjectChanges

Methods inherited from class goodsjpi.Metaobject

modify, mutator

Methods inherited from class java.lang.Object

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

Constructor Detail

PessimisticMetaobject

public PessimisticMetaobject()

Method Detail

beginWriteAccess

public void beginWriteAccess(goodsjpi.Persistent obj)

beginWriteAccess locks the object. That is, the objects storage manager is requested to objeain the lock from the server.

Specified by:

beginWriteAccess in class Metaobject

Parameters:

obj - a Persistent to be modified.

beginReadAccess

public void beginReadAccess(goodsjpi.Persistent obj)

beginReadAccess is a no-op. So, no locking for read's. Multiple readers, one writer.

Specified by:

beginReadAccess in class Metaobject

Parameters:

obj - a Persistent object to be read.

endAccess

public void endAccess(goodsjpi.Persistent obj)

endAccess adds the object to the cahce managers transaction list

Specified by:

endAccess in class Metaobject

Parameters:

obj - a Persistent value