goodsjpi
Class PessimisticRepeatableReadMetaobject

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

public class PessimisticRepeatableReadMetaobject

extends PessimisticMetaobject

PessimisticRepeatableReadMetaobject for pessimistic scheme of synchronization with repeatable read isolation level
While extending the Multiple Reader, one writer aproach, this strategy obtains shred locks for reading, thus ensuring that no write is going on at the same time.

Field Summary

Fields inherited from class goodsjpi.Metaobject

CONSTRUCTOR, EXCEPTION, MUTATOR, VARIABLE

Constructor Summary

PessimisticRepeatableReadMetaobject()

Method Summary

void	beginReadAccess(goodsjpi.Persistent obj) beginReadAccess locks the object in shared mode.
void	endAccess(goodsjpi.Persistent obj) endAccess adds the object to the transaction list, also when the object was not modified.

Methods inherited from class goodsjpi.PessimisticMetaobject

beginWriteAccess

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

PessimisticRepeatableReadMetaobject

public PessimisticRepeatableReadMetaobject()

Method Detail

beginReadAccess

public void beginReadAccess(goodsjpi.Persistent obj)

beginReadAccess locks the object in shared mode.

Overrides:

beginReadAccess in class PessimisticMetaobject

Parameters:

obj - a Persistent object to be read.

endAccess

public void endAccess(goodsjpi.Persistent obj)

endAccess adds the object to the transaction list, also when the object was not modified. Thus the (shared) lock is released.

Overrides:

endAccess in class PessimisticMetaobject

Parameters:

obj - a Persistent object