Cedric,
Actually, I believe you provide the following:
Exclusive concurrency (pessimistic locking at the container level)
This cannot be used in conjunction with clustering, and is therefore
an unscalable solution.
Database based pessimistic concurrency
This can be used with clustering, but is not scalable due to excessive
locking in the database.
Database based optimistic concurrency
This corrupts the database, if done without verified updates (this is
the point that you made yourself, originally).
So, you have a choice between unscalable (pessimistic locking, either
in an unclustered container, or in the central database) or incorrect
(due to unverified updates).
If there is a better option, please explain it. In particular, how do I
deploy a scalable application (meaning one that uses optimistic
concurrency) on WebLogic without running the risk of corrupting
my database (due to a lack of verified updates).
-jkw
Cedric Beust wrote:
> > From: A mailing list for Enterprise JavaBeans development
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Jonathan K. Weedon
>
> > Is such a feature provided in WL6 using EJB 1.1? I did not
> > believe so.
>
> No, we provide either Exclusive concurrency (pessimistic at the container
> level) or Database (pushed to the database, which can be either optimistic
> or pessimistic depending on your database vendor).
>
> None of them corrupt the database (that I know :-)).
>
> --
> Cedric
>
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--
Jonathan K. Weedon: Architect
VisiBroker, Borland AppServer
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