Hi François ,
Thanks for quick reply .
François Exertier wrote:
> Hi,
>
> so, why using BMP if you can do the same into session beans ?
> is your question ...
>
> - with BMP you write the data access code, but you let the
> container manage the data synchronisation, transactions, i.e.
> when to load/store the data ...
But in BMP you have to call ejbload/ejbstore method explicitly
Transaction => that means i don't have to write code for UserTransaction's
methods
begin() , commit() , rollback()
Is this taken care by EJB server.
>
> - entity beans are shared between several clients, while a session
> bean is dedicated to one client.
You mean to say that one enity bean can be in many transaction by serveral clients
at a same time and the modification , cancellation , updation to enity bean is
taken care
by the EJBserver .
Did i get correctly ?
Regards
Ritesh.
>
>
> Regards,
>
> François
>
> Ritesh wrote:
>
> > Hi ,
> >
> > While i am designing my application , i came across with some doubts regarding
>entity
> > beans .
> >
> > Please go through the following .
> >
> > If some where i went wrong or any concept i have taken wrongly please correct me
> >
> > In the j2ee blueprints it is mentioned that for application servers
> > portability you should use BMP inested of CMP until EJB2.0 spec. doesn't come
>up .
> >
> > Now i am confused regarding entity beans .
> >
> > If one make a CMP entity bean which maps to one table in database.
> > all the synchronization between database and entity bean is taken care by EJB
>server .
> >
> > that means user has to concentrate on Business logic only .
> > so one should go for CMP .
> >
> > But CMP doesn't support more than one table from database .
> > if someone has to use more than one table for an entity bean then use
> > the option is to use BMP .
> >
> > In which , any way one has to make connections with database and insert into
>tables .
> > So , why one can't write the same logic(Insert, delete , modification) into
>the
> > stateless session bean ,
> > which is controlled by some synchronized method of controller component ,
> >
> > Then why should one use BMP ?
> > What are the benefits in using BMP ?
> >
> > Thanks
> > Ritesh.
> >
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