This Oracle Weblogic GridLink Data Source is an advanced high-availability solution which is specifically designed for Oracle RAC (Real Application Cluster).
In the earlier recipe we have learnt about the multi Weblogic Data Source option, which has the advantage to be a DB vendor agnostic solution; that being said, a multi Data Source has some limitations too.
Deploying an Oracle Weblogic Data Source at application level requires that you provide a file ending with –jdbc.xml suffix to your application, containing the Data Source definition. For example, if you are going to deploy your Data Source along with your EAR application, you will need to include the file newmodule-jdbc.xml file at the root of the EAR file. Here’s an Eclipse view of your application.