The TxService is a small class that keeps the information whether a current transaction should be rolled back or not (as you can see in the code). It is not a real, full-blown service. The methods in this class were initially in the DbPersistencyService class, but deprecated. What the real use is of such a service I'm not sure. You can configure transactionmanagers in hibernate or your datasource. It has probably something to do with extensibility, but it might just be that no real use for it has come up. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4191190#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...