Re: facelets & jdbc (homework)

Lew <>
Fri, 16 Apr 2010 05:49:45 -0700 (PDT)
On Apr 16, 12:53 am, Thufir <> wrote:

I don't see much information on using facelets with JDBC. I have a
managed bean which connects to the db. Without adding libraries,
what's a good approach to the connection? I was thinking of putting
the connection parameters in web.xml, for instance, but without a
servlet how would the bean read the context parameters? Or, is that
reasonable? Else, putting the parameters at least in a resource
bundle, or a serialized xml class, perhaps.

I'd prefer web.xml, but without a servlet don't know how to read the

If you're running facelets, then you have a servlet.

You set up a data source with the <Resource> tag in the context (e.g.,
the "context.xml" descriptor) and the deployment descriptor ("web.xml"
<resource-ref> tag) and retrieve it programmatically along the lines
of (Tomcat configuration):

        final DataSource ds;
            final Context ctx = (Context) new
InitialContext().lookup( "java:/comp/env");
            ds = (DataSource) ctx.lookup( "jdbc/data" ); // "jdbc/
data" is the name from the <Resource>
        catch ( NamingException nex )
            final String msg = "Unable to locate data source: "
                + nex.getLocalizedMessage();
            logger.error( msg, nex );
            throw new IllegalStateException( msg, nex );

as documented at

You should spend a significant amount of your study time strengthening
your google-fu. I recommend randomly reading relevant articles for
about an hour a day. The Tomcat docs, the Sun Java EE tutorials, and
various articles on <> are good
places to begin.


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