I've deployed Hibernate in JBoss using a SAR file.
To access Hibernate's Factory using JNDI, I need fill the following properties:

hibernate.jndi.url
hibernate.jndi.class

What values do these properties usually have to access via JNDI?

You shouldn't need them. Appservers usually provide defaults, so that you can just do:

new InitialContext();

Sorry for asking, but if a client class issues a "new InitialContext();" command, how does it know that it will access JBoss's JNDI to retrieve the Hibernate Factory without having the JNDI url and class defined?
I'm a little confused.

I asked the same question about JNDI under Tomcat. After new InitialContext(), I did a:

Context ctx = new InitialiContext();
SessionFactory sf = (SessionFactory)ctx.lookup("dgf:/made/up/jndiName");

I used my sessionFactory normally after that. I put it into that context by using a hibernate.cfg.xml and in the opening sessionfactory statement doing this:

<session-factory name="dgf:/made/up/jndiName">

Hibernate created that non-existent context for me. I didn't have to specify any web.xml or server resources to hold it. On Tomcat, my one trick was to not use the example "java:comp/env" related name because, in Tomcat, that is read-only and can't be added to by Hibernate or any webapp unless it's there before the servlet started (i.e. in the server configuration's context or as a resource in web.xml).

Regards,
David

Thanks David. I'll try it.