[Opensource] Architectural Question

[Innovest Ken]

hi mike,

In the middle of designing classes, using Expresso as
the framework, please comment on the following
architecture design:

(1)
JSP--ExpressoController--MultiEntityBean--StoredProcedure
(2)
JSP--ExpressoController--SessionBean--MultiEntityBeans--StoredProcedure

- Notice the difference between the 2 methods is
Session Bean in method(2). Do we need to have a
Session Bean to act as the facade to multiple Entity
Beans? So that we can improve on scalability using
Session EJB on Weblogic? Or ExpressoController in
Method (1) is also good to handle scalability problem?
If so, how it handles scalability, say if I form a
cluster of weblogic servers?

The above question seems confusing, but the most
important question is "Do we need to have a Session
Bean between ExpressoController and Entity Session
Bean"?

- If we decide to use ExpressoController, how is it
comparable to Session Bean, as in what features
ExpressoController has, which Session Bean doesn't
have and vice versa.

- And how does ExpressoController behaves like the
stateful and stateless Session Bean? Does it use
PersistentSession object?

- We intend to user Stored procedure to improve the
performance since we'll be sticking onto Oracle.

Hope to hear from u soon, Mike, any comments from you
on the above design are welcome.

Thanks,
Innovest

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