Difference between revisions of "EclipseLink/Examples/JPA/Configure"

Revision as of 10:32, 16 October 2007

To use JPA you will need to have the following configurations:

• Jar(s) containing your:
  • Persistence.xml - which defines your persistence units
    • It must be defined in the meta-inf/
    • Example:

<persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
  <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>

  <!-- By default your mappings can be defined in orm.xml file, -->
  <!-- which is discovered automatically.                        -->                                     
  <mapping-file>META-INF/advanced-entity-mappings.xml</mapping-file>
  ...
  <jar-file>jpa-xml-only-model-tests.jar</jar-file>
  ...
  <exclude-unlisted-classes>false</exclude-unlisted-classes>

  <properties>
    ...
  </properties>
</persistence-unit>

• • Entities, Embeddable and MappedSuperclasses
    • These classes should be decorated with the necessary annotations, and/or
    • Be defined in the orm.xml using the XML descriptors.
• Properties - use these properties to further configure your JPA application.
  • javax.persistence.transactionType - Standard JPA PersistenceUnitTransactionType property, JTA or RESOURCE_LOCAL.
  • javax.persistence.jtaDataSource - Standard JPA JTA DataSource name.
  • javax.persistence.nonJtaDataSource - Standard JPA non-JTA DataSource name.