Weblogic/Websphere EJB differences

[John M Brown]

I'm more familiar working with EJBs in Weblogic. The project that were about to start may be using Websphere. Does anybody here have any particular information on the implementation, deployment, and use of EJBs in Websphere compared to Weblogic. Particularly Entity beans?
The version we are looking at are Weblogic 6.1 and Websphere 4.0.
Thanks,
John

[Kishore Dandu]

WebSphere is complient with earlier version of EJB spec.
In a sense they are backwards by one version of EJB specification compared to WebLogic. You do not have the availability of message driven beans etc.

[John M Brown]

Thanks.....
How about deployment and any other implementation specifics for EJBs? for instance.... is it possible to deploy EJBs in Websphere without using a GUI tool or console?
How is clustering different? how does Hotdeploy work in Websphere?
If anyone has answers to these questions.... I'd gratly appreciate them...

[Michele Carissimi]

In WAS you can deploy EJBs without using the console, using the XMLConfig tool... the EJBs you deploy in this way have to be WebSphere-friedly: this means that you have to generate the "deployed EJB-JAR" file from VisualAge for Java (or using the EJB deployment tool in version 4) and put it in a particular directory.
Look on the IBM site and on www.redbooks.ibm.com where you can find loads of impressive technical books on WebSphere.
ciao
miki

[Neil Goldsmith]

Originally posted by Kishore Dandu:
WebSphere is complient with earlier version of EJB spec.
In a sense they are backwards by one version of EJB specification compared to WebLogic. You do not have the availability of message driven beans etc.

WAS 4.0.1 basically has Message Driven Beans for all intents and purposes. They do require you to implement a session bean though, but the underlying structure is there for your onMessage routine to start picking up messages.

[hanumanth reddy]

one great differene between both is the the way they handle clustering...