Hi, > > > ok - I'm completly agree with you. Now, I need more technical details > because I'm a new OBJ user. > > We are agree that the "EJB/OJB integration design pattern" is : > > Session beans which are accessing direclty OJB broker(s) > without entity bean > usage.
+1 > My first reflexion expose me to 2 different scenarios : > 1. Using OBJ in client/server mode. Sessions beans are "OJB > clients" and > they uses different remote OJB servers. Load balancing, synchro are > completly managed by OJB servers. I'm not motivate by this > approach for a > EJB integration. and you ? this approach is somewhat "diametral" to EJB concepts. Thus not everyone will like it although it will work fine. > 2. Session beans want to call local "OJB data objects". I > don't see how to > integrate something like a "PersistenceBrokerServer" in a > J2EE server. Can > you point me to usefull info ? How to support clustering, data cache, > connection pool ... in this case ? > It's not necessary to work with PersistenceBrokerServers. You can just run each EJB Server in OJB singlevm mode. By using optimistic locking (and the distributed Lockmanager for pessimistic locking for ODMG transactions) you can properly synchronize all EJB SessionBeans running on multiple EJB servers. > 3. (?) Just keep things as simple as possible. Of course it's possible to run an EJB cluster against an OJB server cluster. But this is only necessary in maximum load scenarios. > > I have to make a demo application and a small doc for my > customer. If you > want I will send it to this mailing list. What do you think > about that ? It > should be nice to find this design pattern in the OJB doc. > Great! All such "cook books", "white papers", "best practise" reports are most welcome and we will integrate them into our documentation ! Thanks, Thomas > Regards, > Christophe > > -----Original Message----- > From: Mahler Thomas [mailto:[EMAIL PROTECTED]] > Sent: vendredi 27 septembre 2002 9:35 > To: 'OJB Users List' > Subject: AW: OJB/JDO in a EJB context > > > Hi, > > > -----Original Message----- > > From: Thomas Mahler [mailto:[EMAIL PROTECTED]] > > Sent: jeudi 26 septembre 2002 19:10 > > To: OJB Users List > > Subject: Re: OJB/JDO in a EJB context > > > > > > > > >Do you expect SUN to admit that entity beans are an > obsolete concept? > > > > No - And you personnaly, do you admit that the entity beans > > are obsolete ? > > > > Sure! The failure of EJB entity beans > (Performance, inheritance hierarchies, ugly finder code) > in one of my customer projects was one of the main reasons to > start the OJB > project! > > cheers, > Thomas > > > -- > > To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
