It's a component and could be integrate with a variety of products, but the huge data volume makes web service not a good candidate in such a case. While lack of pointing to a different data source at deployment time, it is a big gap to enable componentize in EJB3 environment. We do not expect to change data source at runtime, but at deployment time. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4139301#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...