Philippe Durieux wrote:
>
> "Halas, Miroslav" wrote:
> >
> > Weblogic has a configuration parameter on a datasource (or a bean, I don't
> > remember it correctly) to mark it as 'shared'. Shared means that there is
> > other application which is modifying database and therefore beans has to be
> > reread at the beginning of transaction. If the bean/datasource is not marked
> > as shared than the cached copy is used.
> >
> > Can something like this be implemented in Jonas? What would be the best
> > place to put it in?
> >
> > Miro Halas
> >
> Hi Miro,
>
> I think that your proposal is not correct. When you work with transactions,
> you MUST insure that the bean state is written at the end of each transaction,
> regardless if someone else is using it or not.
> What is possible with jonas is only to share entity beans if you don't use
> transactions. In that case, the bean state is kept only in memory until a
> special event occur (end of server, timeout, start of transaction, ...).
> This is effective only for beans declared as "Reentrant".
>
> Philippe
>
Hello again!
To be precise, I should say that ejbStore() is mandatory, but ejbLoad()
could be avoid if we had choosen another policy in JOnAS.
We have decided in JOnAS to passivate bean instances after each transaction,
so we must reread the bean state at each begin.
May be we could think about another policy? 3 possible policies are described
in EJB specifications, we have chosen one of them. It's not possible to choose
another one in the deployment descriptor today!
--
Philippe Durieux ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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