Administration Guide for Oracle Billing Insight > Creating Applications and Jobs >

About Mapping Your Application to a Data Source EJB

You must specify a data source EJB for each application data definition name (DDN) you create in the Command Center. When creating an application in the Command Center, a data source refers to an EJB in your application EAR file that specifies summary information and location of your document data. For information on developing a custom data source EJB, consult your Oracle Professional Services representative.

The Data Source Name is the real, global JNDI name as opposed to the local JNDI name, as in

java:comp/env/...

The data source EJB exists in a separate presentation EAR file. To successfully create the application, the JNDI name must exist and the EJB must be properly deployed and available to application. The Command Center validates the JNDI name before the mapping is persisted.

Specifying the data source EJB at the DDN level allows you to set the JNDI mapping without modifying deployment descriptors, repackaging, and redeploying your Web application. Setting the data source EJB at the DDN level also enables you to retrieve, for example, live data from an external database or archival data from offline storage. In some cases, customizing the data source can also improve performance and save disk space.