Re: How to Set Last Updated Time Automatically?

[Ron Gallagher <rg...@bellsouth.net>]

Gene --

There are two interfaces designed to handle this situation: org.apache.ojb.broker.PBLifeCycleListener and org.apache.ojb.broker.PersistenceBrokerAware.

The PBLifeCycleListener interface can be used by any object.  Just implement the interface in your class and register it as a listener with the PersistenceBroker.  PBLifeCycleListener includes two methods, beforeInsert and beforeUpdate, that are well suited for your situation.

The PersistenceBrokerAwareinterface is intended to be used by a persistence-capable class.  PersistenceBrokerAwareinterface defines two methods with the same names that can also be used in your situation.

Ron Gallagher
Atlanta, GA
rongallagher@bellsouth.net

> From: "Gene Qian" <ge...@hotmail.com>
> Date: 2003/09/18 Thu AM 01:13:59 EDT
> To: ojb-user@db.apache.org
> Subject: How to Set Last Updated Time Automatically?
> 
> Hi,
> 
> I have a persistent field, say, lastUpdated(column is 
> LAST_UPDATED_DATETIME), which is used to store last updated time of the db 
> record. My question is: Can we use OBJ automatically set and store the field 
> with right datetime when the persistent object was stored to DB with any 
> field value changed? If so, how to do?
> 
> Any comments will be appreciated.
> 
> Gene



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