have you implemented (EntityManager.persist) the object you want to persist
http://tudu.svn.sourceforge.net/viewvc/tudu/trunk/tudu2/tudu-core/src/main/java/tudu/domain/dao/jpa/UserDAOJpa.java?revision=480&view=markup
?
Martin
______________________________________________
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> Date: Tue, 6 Apr 2010 18:41:07 -0700
> From: glassfish_at_javadesktop.org
> To: users_at_glassfish.dev.java.net
> Subject: JEE 6 / Glassfish v3 / Eclipse - JPA Entity Manager Issues
>
> 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
> [Message sent by forum member 'iceman3479']
>
> http://forums.java.net/jive/thread.jspa?messageID=395613
>
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