Hi,
I'm working on a project that involves migrating a set of ejb2.1 entity
beans to jpa.  The big snag we have run into is that the old code used a
weblogic specific descriptor
"<delay-updates-until-end-of-tx>false</delay-updates-until-end-of-tx>".  the
bea website documents this flag as such:
----------------------------------------------------------------------------------------------------
from "http://e-docs.bea.com/wls/docs100/ejb/entity.html#wp1195783 "
Updating the Database Before Transaction Ends

As described in Understanding ejbLoad() and ejbStore() Behavior, by default,
WebLogic Server calls ejbStore() only when the transaction commits.

To make intermediate results of uncommitted transactions available to other
database users, set delay-updates-until-end-of-tx in the persistence element
of weblogic-ejb-jar.xml to False—this causes WebLogic Server to call
ejbStore() after each method call.
Note:  While setting delay-updates-until-end-of-tx to false results in
database updates after each method call, the updates are not committed until
the end of the transaction.
----------------------------------------------------------------------------------------------------

While we would love to rewrite the code to eliminate the need for these
"dirty reads", we have been asked if we can just duplicate the weblogic
functionality.  weblogic uses openjpa 0.9.7 and we have an oracle 10g
database.  for yucks, we tried setting the openjpa transaction isolation
level to "read uncommitted" but it appears that oracle does not support
that.

Thanks for any help we can get,
Charlie.


-- 
Charlie Walker - Registered Linux User #62358

"Now and then we had a hope that if we lived and were good, God would permit
us to be pirates." - Mark Twain

Reply via email to