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Difference between revisions of "EclipseLink/Examples/JPA/NativeMetadata"
< EclipseLink | Examples | JPA
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| − | You may use the org.eclipse.persistence.jpa.JpaHelper class to obtain an EntityManager. | + | [[Category:EclipseLink/Example/JPA|NativeMetadata]] |
| + | |||
| + | You may use the [http://www.eclipse.org/eclipselink/api/1.2/org/eclipse/persistence/jpa/JpaHelper.html <code>org.eclipse.persistence.jpa.JpaHelper</code>] class to obtain an EntityManager. | ||
== Using a server session == | == Using a server session == | ||
| − | < | + | <source lang="java"> |
| − | EntityManagerFactory emf = | + | EntityManagerFactory emf = JpaHelper.createEntityManagerFactory(serverSession); |
EntityManager em = emf.createEntityManager(); | EntityManager em = emf.createEntityManager(); | ||
| − | </ | + | </source> |
== Using a sessions.xml file == | == Using a sessions.xml file == | ||
| Line 11: | Line 13: | ||
If you want to use EclipseLink or Oracle TopLink's native XML metadata within EclipseLink JPA this can be accomplished using API: | If you want to use EclipseLink or Oracle TopLink's native XML metadata within EclipseLink JPA this can be accomplished using API: | ||
| − | < | + | <source lang="java"> |
| − | EntityManagerFactory emf = | + | EntityManagerFactory emf = JpaHelper.createEntityManagerFactory(sessionName); |
EntityManager em = emf.createEntityManager(); | EntityManager em = emf.createEntityManager(); | ||
| − | </ | + | </source> |
| − | + | ||
| − | + | ||
| − | + | or through the use of persistence unit properties in your persistence.xml: | |
| − | + | <source lang="xml"> | |
| + | <persistence xmlns="http://java.sun.com/xml/ns/persistence" | ||
| + | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| + | xsi:schemaLocation="http://java.sun.com/xml/ns/persistence persistence_1_0.xsd" | ||
| + | version="1.0"> | ||
| + | <persistence-unit name="my-app" transaction-type="RESOURCE_LOCAL"> | ||
| + | <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> | ||
| + | <properties> | ||
| + | <property name="eclipselink.sessions-xml" value="org/my-app/persistence/sessions.xml"/> | ||
| + | <property name="eclipselink.session-name" value="my-app"/> | ||
| + | </properties> | ||
| + | </persistence-unit> | ||
| + | </persistence> | ||
| + | </source> | ||
Latest revision as of 12:04, 26 November 2009
You may use the org.eclipse.persistence.jpa.JpaHelper class to obtain an EntityManager.
Using a server session
EntityManagerFactory emf = JpaHelper.createEntityManagerFactory(serverSession); EntityManager em = emf.createEntityManager();
Using a sessions.xml file
If you want to use EclipseLink or Oracle TopLink's native XML metadata within EclipseLink JPA this can be accomplished using API:
EntityManagerFactory emf = JpaHelper.createEntityManagerFactory(sessionName); EntityManager em = emf.createEntityManager();
or through the use of persistence unit properties in your persistence.xml:
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence persistence_1_0.xsd" version="1.0"> <persistence-unit name="my-app" transaction-type="RESOURCE_LOCAL"> <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> <properties> <property name="eclipselink.sessions-xml" value="org/my-app/persistence/sessions.xml"/> <property name="eclipselink.session-name" value="my-app"/> </properties> </persistence-unit> </persistence>