Business/Data access tier - need an advise

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Igor - 14 Jul 2003 16:05 GMT

Hello all,

We are about to start a project for an Internet medium to high load website.
For the presentation tier our choice is Struts.

What would you recommend for the business/da tier implementation:

1. EJB - Session bean as a facade and CMP 2.0 beans
2. Session bean as a facade + object/relational persistence framework (like
Hibernate) for DA.
3. Session bean as a facade + JDBC for DA.
4. Pure JDBC.

Any help well be appreciated.

/Igor

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Trebor - 23 Jul 2003 02:10 GMT

I would advice

use CMP 2.0 Entiy Beans whenever possible
- smart optimized container
- development independent from deployment

with 3 exceptions:
prefer BMP + O/R mapper (toplink, db-ojb, hibernate to name a few ones...)
when
- datasource not supported by the container
- schema two complex for the persistence manager.

consider stateless session beans + straight JDBC
- when non relational datasource
- simple transactions
- mainly reading

statefull session bean
- when important result set to cursor

Of course avoid mix of all to minimize number of mappings

Robert.

> Hello all,
>
[quoted text clipped - 12 lines]
>
> /Igor

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