...
This documentation will describe how to make use of a JNDI resource. Creating and managing a JNDI resource is container specific and beyond the scope of uPortal documentation. Please refer to your container documentation.
Build-time v Run-time
...
datasources
The big difference between built-time and run-time, so far as datasources are concerned, is that at build-time uPortal is not being run inside the J2EE Web Application Container (eg Tomcat). This means that uPortal at built-time does not have access to any resources defined and created by the container, such as JNDI resources. So, at build-time uPortal must use a direct connection to its datasource as it can't use a JNDI resource.
...
'PortalDb' is hard coded in the uPortal code as the ID of the Spring bean which provides the datasource to uPortal. The 'PortalDb' bean above is a direct connection datsourcedatasource. A JNDI managed datasource would be defined as follows (with the 'jndiName' property value being set to the name of your JNDI resource):
...