Hi Dain, On Dec 12, 2006, at 6:24 PM, Dain Sundstrom wrote:
Does JPA guarantee that only one bean will be activated for a specific pk per transaction?
Yes.
Specifically, will OpenJPA ever create more that one bean for a specific Class:PK in a single transaction?
No.
The reason I'm asking is I may want to use an identity map and don't want to end up with multiple entries for the same pk.
That is actually the internal implementation.
This would be very convenient for managing beans that have not had identity established yet.
Huh? JPA implementations only create beans that have a database identity already. For "new" beans, you need to call em.persist in order to create a database identity, and this will fail (eventually, according to both CMP2 and EJB3 specifications) if there is already a persistent bean with the same identity.
Craig
-dain
Craig Russell Architect, Sun Java Enterprise System http://java.sun.com/products/jdo 408 276-5638 mailto:[EMAIL PROTECTED] P.S. A good JDO? O, Gasp!
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