Chapter 8 Creating J2EE Applications for BEA WebLogic

Using WebLogic Server RDBMS Persistence

To use WebLogic Server RDBMS-based persistence, you must create a dedicated XML deployment file and define the persistence elements for each EJB that will use container-managed persistence. If this file is created by WebLogic Server utilities, such as DDConverter, it is named weblogic-cmp-rdbms-jar.xml. If you create the file from scratch, you can save it to a different filename. However, you must ensure that the persistence-type and persistence-use elements in weblogic-ejb-jar.xml refer to the correct file.

weblogic-cmp-rdbms-jar.xml defines the persistence deployment descriptors for EJBs using WebLogic Server RDBMS-based persistence services.

Each weblogic-cmp-rdbms-jar.xml defines the following persistence options:

• EJB connection pools or data sources
• EJB field to database element mappings
• WebLogic-QL
• Foreign key mappings for relationships
• WebLogic Server-specific deployment descriptors for queries

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