Seam-managed persistence contexts and Glassfish

17. Mar 2008, 01:05 CET | Link Praveen Jain

Hello forum,

I have recently been learning about Seam for my current project and one of the things I am trying to figure out is seam-managed persistence context.

I have changed a simple hello world code to use seam-managed persistence context but I am not able to run it successfully on glassfish. I get following he error when I call getPeople() method in the ejb...

javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean; nested exception is: java.lang.IllegalArgumentException: EntityManagerFactory not found in JNDI : persistence/em

Here is the code snippet from various files..

Persistence.xml

  <persistence-unit name="test" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>jdbc/Postgress</jta-data-source>
    <class>seam.entities.Person</class>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
      <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
    </properties>
  </persistence-unit>

Code sippet from web.xml

    <persistence-unit-ref>
        <persistence-unit-ref-name>persistence/em</persistence-unit-ref-name>
        <persistence-unit-name>test</persistence-unit-name>
    </persistence-unit-ref>
    <ejb-local-ref>
        <ejb-ref-name>DataBean</ejb-ref-name>
        <ejb-ref-type>Session</ejb-ref-type>
        <local>seam.beans.DataLocal</local>
    </ejb-local-ref>

Code snippet form component.xml

    <persistence:managed-persistence-context name="em"
                                             auto-create="true" 
                                             persistence-unit-jndi-name="persistence/em"/>
    
    <core:init jndi-pattern="java:comp/env/#{ejbName}" debug="false"/>

Code snippet from the DataBean

@Stateless
@Name("dataBean")
@Interceptors({org.jboss.seam.ejb.SeamInterceptor.class})
public class DataBean implements DataLocal {
...
...

   @In
    private EntityManager em;
    private int countPeople;
    
    @Override
    public String getPeople() {
        em.persist(person);
        person = new Person();
        setFans((List<Person>) em.createQuery("select p from Person p").getResultList());
        return null;
    }
 
...
...
}

What else I am missing?

Any help you can provide will be much appreciated.

Thank You.