JAR Files

<< Persistence Units | Persistence in the Web Tier >>

JAR Files

</description>

<jta-data-source>jdbc/MyOrderDB</jta-data-source>

<jar-file>MyOrderApp.jar</jar-file>

<class>com.widgets.Order</class>

<class>com.widgets.Customer</class>

</persistence-unit>

</persistence>

This file defines a persistence unit named OrderManagement, which uses a JTA-aware data
source jdbc/MyOrderDB. The jar-file and class elements specify managed persistence
classes: entity classes, embeddable classes, and mapped superclasses. The jar-file element
specifies JAR files that are visible to the packaged persistence unit that contain managed
persistence classes, while the class element explicitly names managed persistence classes.

The jta-data-source (for JTA-aware data sources) and non-jta-data-source
(non-JTA-aware data sources) elements specify the global JNDI name of the data source to be
used by the container.

Managing Entities

The Java EE 5 Tutorial · September 2007

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