From: <glassfish_at_javadesktop.org>
Date: Tue, 06 Apr 2010 18:41:07 PDT

Hey gang,

This is my first post on the java.net forums. It seems like a very nice community, hopefully ya'll can help me out on my issue.

I am creating a layered project

- EAR Project
  - EJB Project
  - JPA Project
  - WAR Project

Right now I have my web layer creating a new "user" entity with a username/password (via JSF 2.0 & AJAX; which is really cool).

@ManagedBean(name = "userBeanUtil")
@SessionScoped
public class UserBeanUtil
{
        private User user;
        
        public UserBeanUtil()
        {
                this.user = new User();
        }

        public User getUser()
        {
                return user;
        }

        public void setUser(User user)
        {
                this.user = user;
        }
        
        public void createUserAction(ActionEvent event)
        {
                DevUserController.update(user);
        }

I then call the EJB layer UserController.update(user) hitting a local EJB which then calls an update method in my JPA layer.

@LocalBean
@Stateless
public class UserController
{

        /**
         * Default constructor.
         */
        public UserController()
        {
        }
        
        public static void update(User user)
        {
                UserHandler.persist(user);
        }

}

This layer will actually persist the data to the database. However, no matter how I try, I the "EntityManager" is always null.

public class UserHandler
{
        @PersistenceUnit(unitName = "MyPersistenceUnit")
        private static EntityManager em1;

        @PersistenceUnit(name = "MyPersistenceUnit")
        private static EntityManager em2;

        @PersistenceUnit
        private static EntityManager em3;

        @PersistenceContext(unitName = "MyPersistenceUnit")
        private static EntityManager em4;

        @PersistenceContext(unitName = "MyPersistenceUnit")
        private static EntityManager em5;

        @PersistenceContext
        private static EntityManager em6;

        public static void persist(User user)
        {
                em1.persist(user);
        }

}

Here is my persistence.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
        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 http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
        <persistence-unit name="MyPersistenceUnit" transaction-type="JTA">
                <jta-data-source>jdbc/RDF</jta-data-source>
        </persistence-unit>
</persistence>

Now, I did go through the MySQL / Glassfish V3 tutorial and setup a connection pool and JDBC Resource. I did a ping test on jdbc/RDF and it was successful.

Long story short; I have no clue how come my EntityManager is not being injected.

Anyone have any ideas?

Hope I've given enough information. If not let me know; I'll be happy to provide more info.

Also, if ya'll have links to "JEE6 Best Practices Documents" please feel free to share.

Thanks,
Chris
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