[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-3612) examples should demonstrate obtaining entity manager factory from JNDI via persistence unit reference

[Dan Allen (JIRA)]

examples should demonstrate obtaining entity manager factory from JNDI via persistence unit reference
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                 Key: JBSEAM-3612
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-3612
             Project: Seam
          Issue Type: Feature Request
          Components: Examples
    Affects Versions: 2.1.0.GA
            Reporter: Dan Allen
            Priority: Minor
             Fix For: 2.1.1.CR1


For any example that is deploying to a standard Java EE 5 environment (for instance the jpa example deploying to GlassFish or JBoss AS 5), the entity manager factory should be obtained through JNDI through a persistence unit reference.

5.3.1 of JPA spec:

"Within a Java EE environment, an entity manager factory may be injected using the Persistence-Unit annotation or obtained through JNDI lookup."

It would first need to be declared in web.xml:

   <persistence-unit-ref>
      <persistence-unit-ref-name>bookingDatabase/emf</persistence-unit-ref-name>
      <persistence-unit-name>bookingDatabase</persistence-unit-name>
   </persistence-unit-ref>

Then the components.xml would look like this:

<persistence:managed-persistence-context name="entityManager"
    auto-create="true"
    persistence-unit-jndi-name="java:comp/env/bookingDatabase/emf" />

The reason we should do this is to advocate the Java EE standard approach.

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