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From "Shapira, Yoav" <Yoav.Shap...@mpi.com>
Subject RE: Configuration free persistence?
Date Wed, 12 May 2004 13:27:16 GMT

Hi,
It's not blasphemy ;)  It's a good question.  Many people take shortcuts
/ cut corners to get around this ;)

>b) Require that a database be present and publish the datasource name
that
>the web app is looking for, and assume that the user will configure
their
>container properly (and, of course, your web app must be compatible
with
>that database).

This option is the one most inline with the J2EE specification and
spirit.  Some people go further and include a DB with their application
(e.g. MySQL, or postgreSQL), and then require the client/sysadmin to
configure a directory where the DB can write.  This is similar to your
system property approach (option c in your original post).

Here's another take that's not seen often, but is intriguing: the
java.util.prefs API.  It uses the Registry on Windows, and the
filesystem on unix, by default, but that can be changed.  If you're
running on Windows this is a decent approach (but then again if you're
only running on windows you might make a whole set of choices based on
that).

Yoav Shapira



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