Instead of using connection URLs, client applications can access a JNDI-named data source using a logical name to retrieve the javax.sql.DataSource object. This object loads the driver and establishes the connection to the service.
Once a JDBC data source has been registered with JNDI, it can be used by your JDBC application as shown in the following example:
Connection con = ds.getConnection("john", "be4ch");
In this example, the JNDI environment is first initialized. Next, the initial naming context is used to find the logical name of the JDBC data source. The Context.lookup() method returns a reference to a Java object, which is narrowed to a javax.sql.DataSource object. Finally, the DataSource.getConnection() method is called to establish a connection with the service.
