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- Object/relational mapping XML file named orm.xml may be specified in the * META-INF directory in the root of the
persistence unit.
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JPA configuration and geronimo plans
The persistence.xml file can declare more than one persistence-units. A persistence-unit declaration in the persistence.xml can be overridden in geronimo plans (geronimo-web.xml or openejb-jar.xml) as follows.
- If a persistence-unit is declared in both in persistence.xml as well as in a geronimo plan
(geronimo-web.xml or openejb-jar.xml), the declaration in the geronimo plan will override the declaration
in the persistence.xml
- The below example illustrate the overriding feature in geronimo.
| Note |
|---|
| Code Block |
|---|
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<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="AccountUnit" transaction-type="JTA">
<description>ContainerManagedJPA</description>
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>AccountDS</jta-data-source>
<class>sample.jpa.Account</class>
<class>sample.jpa.Person</class>
</persistence-unit>
</persistence>
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The AccountUnit can be overridden in openejb-jar.xml as follows. | Code Block |
|---|
|
<openejb-jar xmlns="http://openejb.apache.org/xml/ns/openejb-jar-2.2"
xmlns:naming="http://geronimo.apache.org/xml/ns/naming-1.2"
xmlns:sec="http://geronimo.apache.org/xml/ns/security-2.0"
xmlns:sys="http://geronimo.apache.org/xml/ns/deployment-1.2">
<sys:environment>
<sys:moduleId>
<sys:groupId>ContainerManagedJPA</sys:groupId>
<sys:artifactId>EJB</sys:artifactId>
<sys:version>1.0</sys:version>
<sys:type>car</sys:type>
</sys:moduleId>
<dependencies>
<dependency>
<groupId>console.dbpool</groupId>
<artifactId>AccountDS1</artifactId>
</dependency>
</dependencies>
</sys:environment>
<persistence xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="AccountUnit" transaction-type="JTA">
<description>ContainerManagedJPA</description>
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>AccountDS1</jta-data-source>
<class>sample.jpa.Account</class>
<class>sample.jpa.Person</class>
</persistence-unit>
</persistence>
<enterprise-beans/>
</openejb-jar>
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The AccountUnit is overridden in openejb-jar.xml to use the JTA datasource AccountDS1. In the persistence.xml, it was declared to use the JTA datasource AccountDS. Similarly, the persistence-units can be overridden in geronimo-web.xml right after the <sys:environment> declaration. |
