Hello, I have developed a simple JEE application to learn this new technology. I created a EAR file which contains a WAR file and a JAR file. The JAR file contains my JPA code. All works fine but at the moment I have transaction-type = "RESOURCE_LOCALE". In other words the connection is not managed by the application server. I now want to move to the next step and change transaction-type = "JTA". This however means that I also need to define jta-data-source value. I created the data source from the application server (I tried on Geronimo and GlassFish). My problem is that when I deploy the application I get an error that it could not find the data source.
Since I am getting the same error on two different application servers I know that the problem is on my side. However I cannot understand where. After a lot of search on the Internet I tried to create an ejb-jar.xml file in my JAR file and set my datasource reference there. However this is not working either.
My question is; if I am creating a JPA library to be deployed on an application server, do I need to define the data source anywhere? and if yes where? A simple hint would really help me a lot.