Re: finder or select methods - how to....

Do you mean DB independence( portability?)?

I do not believe in that. But if you will use SQL92
than your SQL code will be portable enough.

Again, do not create objects, unless you are going to
perform CRUD. Performance etc.

EJBs suppose to have only storage logic...
All your business logic should go to SessionBeans.

Read really good book Core EJB Pattern for more
information.


--- niksa_os <[email protected]> wrote:
> > Very rough outline:
> >
> > That is a common mistake to use EntityBeans
> methods to
> > find list of objects just for browse. It kills
> > performance and convenience.
> > Possible solution:
> > A Session bean should be aware of DB structure and
> > should take care of browsing and searching. When
> time
> > comes to CRUD (CreateReadUpdateDelete) for an
> object,
> > then use EntityB and its finder methods.
> >
> > In your case I would suggest to create SQL
> dynamically
> > on SessionBean depends on some
> meta-description(s).
> 
> Yes, I think about that, but in this case
> SessionBean is less portable
> because of JDBC stuff. I can do this with properties
> but.........
> 
> What you think about this solution?
> All code is in one Entity, and only expected numbers
> of EJB objects were
> created.
> 
> For every field I make select method which return
> Set. And after that I call
> all this select method in one ejbHome and make
> retainAll(Collection) which
> return only expected numbers of EJB objects to the
> session.
> 
> What's your opinion? Lots SQLs to DB?
> 
> 
>
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