Hi,
for more info on this subject you can follow this link:
http://developer.java.sun.com/developer/restricted/patterns/AggregateEntity.
html
The note is part of "Sun Java Center J2EETM Patterns First Public
Release:
Version 1.0 Beta", a recently released beta-version book on design patterns
for the J2EE platform.
See you,
Carlos
----- Original Message -----
From: "François Exertier" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Friday, February 23, 2001 12:49 PM
Subject: Re: JOnAS, EJB applications, and performance
> Hi,
>
> a complementary information related to our discussion of the beginning
> the week. A very interesting article on the design of entity beans...
> Not so easy ... EJB2.0 persistence (with relationships and dependent
> objects) should help ...
>
> http://www.sdmagazine.com/articles/2000/0004/0004c/0004c.htm#
>
> Best Regards,
>
> François
>
> [EMAIL PROTECTED] wrote:
>
> > > Therefore what is recommended is to build session beans,
> > > that will aggregate operations on entity beans, and return
> > > the whole data needed by the client. You may also define
> > > methods on the entity beans that return a bunch of data
> > > instead of EJB references (as finder methods do).
> > ...
> > Returning a bunch of data is also only a workaround: It's neither object
oriented design, nor is it transparent to the
> > application developer.
>
> --
> ==================================================================
> Francois EXERTIER Evidian (Groupe Bull)
> 1, rue de Provence, BP 208, 38432 Echirolles cedex, FRANCE
> mailto:[EMAIL PROTECTED]
> http://www.evidian.com/jonas http://www.objectweb.org/jonas
> Tel: +33 (0)4 76 29 71 51 - Fax: +33 (0)4 76 29 77 30
> ==================================================================
>
>
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