do you mean you want to use the same deployment descriptor for each bean, or that you want the beans to have the same code and just change the descriptor?
I mean that the Resource-name('myDB') is mapped on a datasource ear-wide. First I thought you can make this in a jboss-app.xml or applikation.xml like you can do that in a jboss-web.xml but that doesnt work.
My problem is, I would like to avoid to build a deployment descriptor for twenty or more beans in an applikation. With my beans I want to make up reusable code. So I decided, that every datasource gets the name 'myDB' and is mapped to the global jndi-name 'java:/MyDefaultDS'. Now I have the problem that more than one applikation is deployed on a server with different databases. I can manage this with a deployment descriptor in each bean but that is to complicated.
I hope the problem is more perspicuous even if my english is a disaster.
i would make each bean that needs a datasourse use a local jndi lookup instead of a global one. since you only have one jar you will only need one ejb-jar.xml and one jboss.xml.
doing it this way you can keep your bean code the same, for example all lookups could be:
DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/MyDS");
then in the jboss.xml you can map the lookup to the proper data source on a per bean basis.
How does look the mapping in a jboss.xml and ejb-jar.xml?