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Persistence System

Jignesh Patel
Ranch Hand

Joined: Nov 03, 2001
Posts: 626

To Authors,
Is JBoss uses Hibernate internally for Persisting CMPs?
Wiley Snyder
Greenhorn

Joined: Oct 26, 2005
Posts: 23
Wiley, be nice. -- Marilyn
[ February 08, 2006: Message edited by: Marilyn de Queiroz ]
Tom Marrs
Author
Ranch Hand

Joined: Sep 20, 2000
Posts: 67
I don't know about CMP under EJB 2.1, but I do know that JBoss uses Hibernate as the underlying persistence engine for EJB 3.0 CMPs.

Tom
Dave Salter
Ranch Hand

Joined: Jul 20, 2005
Posts: 292

EJB 2.1 CMP does not use Hibernate as its underlying technology.
S Davis
Author
Ranch Hand

Joined: Feb 07, 2006
Posts: 40
Hibernate is an Object-Relational Mapper. So are Entity Beans. Entity Beans are a part of the J2EE spec -- Hibernate is not.

The EJB3 spec has been greatly influenced by the success of Hibernate (http://www.theserverside.com/news/thread.tss?thread_id=33450), but the two are not the same (regardless of how JBoss implements it under the covers).

The conclusion we came to in the book: EJB 2.1 CMP Entity Beans have fallen out of favor. Hibernate is catching a lot of buzz, but it is not spec-compliant. (We used it anyway.) EJB3 looks very interesting, but it won't be in mainstream use for another year or so.
 
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subject: Persistence System
 
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