Design issue for MDB and JDBCs

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Design issue for MDB and JDBCs

Design issue for MDB and JDBCs

2003-08-21 - By Igor Cunko

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Reply: 1 2 3 4

> -- --Original Message-- --
> From: Ivy Se [mailto:ivy12see@(protected)]
> Subject: Design issue for MDB and JDBCs
>
> I've got a design issue.
>
> Should I make JDBC calls on the MDBs or 'outsourced'
> it to a Stateless Session Beans?
>
> You see, the code has
>
> public void ejbCreate() throws CreateException {
> try {
> InitialContext ic = new InitialContext();
>
> dataSource = (DataSource)
> ic.lookup(JNDI_DATASOURCE);
>
> ic.close();
>
> And the onMessage has got JDBC calls and closing the
> connection once done, etc.
>
>
> QUESTION: Is it going to be inefficient to have such
> JDBC stuff for a MDBs that listens to hundreds of
> messages from a given Queue?
>
> What's your recommendation....to have them passed on
> to a pool of stateless beans to handle to JDBCs?
>
> Thank you.

For lookups, you can cache result first time you got reference so you can
avoid creating new context each time. I don't see any difference in
performance executing code in MDB or session bean, although I would delegate
to session bean because it gives you flexibility to aggregate functionality
easier than with MDB.

Igor

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