Properties and config in persistence.xml

List of elements in persistence.xml

<!-- turn off 2nd level caching (optional), values: NONE, ALL, DISABLE_SELECTIVE, ENABLE_SELECTIVE, --> <shared-cache-mode>NONE</shared-cache-mode> <!-- desired provider (optional), if not present, default provider will be used --> <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> <!-- if true, only listed classes will be treated as entities. Default false. Not applicable for Java SE, where every entity must be listed --> <exclude-unlisted-classes>false</exclude-unlisted-classes> <!-- optional declaration of used datasource. If not specified, connection properties must be specified. Otherwise will use the referenced datasource provided by the container --> <jta-data-source>jdbc/ds</jta-data-source>
Code language: HTML, XML (xml)

These elements can be overridden with the following properties, if a map is passed to EntityManagerFactory:

  • javax.persistence.provider to define the provider class used
  • javax.persistence.transactionType to define the transaction type used (either JTA or RESOURCE_LOCAL)
  • javax.persistence.jtaDataSource to define the JTA datasource name in JNDI
  • javax.persistence.nonJtaDataSource to define the non JTA datasource name in JNDI
  • javax.persistence.lock.timeout – pessimistic lock timeout in milliseconds (Integer or String)
  • javax.persistence.query.timeout – query timeout in milliseconds (Integer or String)
  • javax.persistence.sharedCache.mode corresponds to the share-cache-mode element defined in Section 2.2.1, “Packaging”
  • javax.persistence.validation.mode corresponds to the validation-mode element defined in Section 2.2.1, “Packaging”

See Hibernate 3.5 reference

List of standard properties

Driver:

<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
Code language: HTML, XML (xml)

URL:

<property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/chapter02DB;create=true"/>
Code language: HTML, XML (xml)

User:

<property name="javax.persistence.jdbc.user" value="APP"/>
Code language: HTML, XML (xml)

Password:

<property name="javax.persistence.jdbc.password" value="APP"/>
Code language: HTML, XML (xml)

Hibernate properties

Debug SQL:

<property name="hibernate.show_sql" value="true"/>
Code language: HTML, XML (xml)

Schema generation (optional):

<!-- create the database schema automatically, values: create-drop, update --> <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
Code language: HTML, XML (xml)

Dialect:

<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
Code language: HTML, XML (xml)

EclipseLink properties

Schema generation (optional):

<!-- create the database schema automatically, values: create-tables, drop-and-create-tables --> <property name="eclipselink.ddl-generation" value="create-tables"/>
Code language: HTML, XML (xml)

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