In GemStone (which, BTW, was the first commercial OODBMS to ship, back in 1987, and which still has all the OODBMS capability it ever had, with 15 years' maturity), entity beans can store their state in the OODBMS or an RDBMS. In the open-souce FoodSmart example application we provide, this behavior is controlled by a property read at start-up time. In GemStone/J 4.0, entity beans can transparently cache their state in the OODBMS, when that state is originally read from an RDBMS (and updates to the state are written through both places). This transparent caching behavior, which is controlled by a deployment descriptor attribute, improves application performance by eliminating the response time performance of O/R mapping on every read - it's analogous to the role of the RAM cache in PC architectures. See http://www.gemstone.com. Best Regards, Randy Stafford Senior Architect GemStone Professional Services > -----Original Message----- > From: Pankaj Rathi [SMTP:[EMAIL PROTECTED]] > Sent: Tuesday, August 01, 2000 2:03 AM > To: [EMAIL PROTECTED] > Subject: EJB with ODBMS > > Hello ALL. > Can entity beans connect to ODBMS like ObjectStore, Jasmine, etc. I ve > read > somewhere that this is possible. > But the question is how do we write the Deployment Descriptor for this. > Further, since ObjectStore does not have unique primary key concept, > how > do we define our PrimaryKey class, etc. etc. > > Thanx in anticipation. > > rgds > pr > > ========================================================================== > = > To unsubscribe, send email to [EMAIL PROTECTED] and include in the > body > of the message "signoff EJB-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
