Hi Cesar I had a go with your XA sample PR. I've picked it up and expanded on it: https://github.com/apache/tomee/pull/488
Can you take a look and see what you think? I've removed any references to ojdbc jar, and tweaked so the jars for the Grinder framework aren't committed to the repository. Out of the box, it runs with Derby, but I think providing instructions for Oracle, SQL Server, etc would be worthwhile so people can run their own tests against different databases. Thanks Jon
