[jboss-dev-forums] [JBoss AS 7 Development] - @PersistenceContext is null in jboss7

[yunshi tan]

yunshi tan [https://community.jboss.org/people/yunshi] created the discussion

"@PersistenceContext is null in jboss7"

To view the discussion, visit: https://community.jboss.org/message/759623#759623

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Hi all,

I am migrating jboss4.2.3 -> jboss7 and I am totally blocked by the probleme that @PersistenceContext  always returns me NULL in the EJB jars.

Here are the projects in my deployment :

deployment
-----------------------------
  - hibernate-ejb-1.jar
     | - src/main/java ... some entities and DAO
    | - src/main/resources
              | - META-INF
                    | - hibernate.cfg.xml
                    | - persistence.xml

 - seam2App.ear
     | - module1.jar
    | - module2.jar
     | - war1.war


     hibernate-ejb-1.jar offers some DAO functions for my seam2App.ear and other applications. *However, in hibernate-ejb-1.jar, all the @PersistenceContext  EntityManager returns NULL.*

*Here is the persistence.xml*

<persistence xmlns=" http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence"
          xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation=" http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence  http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
          version="1.0">
               <persistence-unit name="xxx-unit" transaction-type="JTA">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
                         <jta-data-source>java:/xxxxxDS</jta-data-source>
                         <properties>
                     <property name="hibernate.ejb.cfgfile" value="/META-INF/hibernate.cfg.xml"/>
                    <property name="jboss.entity.manager.factory.jndi.name" value="java:jboss/EntityManagerFactories/xxx"/>
                    <property name="hibernate.session_factory_name" value="java:jboss/hibernate/SessionFactoryxxx"/>
                    <property name="jboss.as.jpa.providerModule" value="org.hibernate:3" /> 
         </properties>
          </persistence-unit>
</persistence>


In the *cosole*, I have 

12:15:49,752 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-2) JNDI bindings for session bean named xxxDAOImpl in deployment unit deployment "xxxxxxx-SNAPSHOT.jar" are as follows:


        java:global/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxx.dao.common.remotexxxxxxDAORemote
        java:app/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.remote.xxxxxxDAORemote
        java:module/xxxxxxDAOImpl!com.xxxxxx.dao.common.remote.xxxxxxDAORemote
        java:jboss/exported/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.remote.xxxxxxDAORemote
        java:global/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal
        java:app/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal
        java:module/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal


In other applications who depend on hibernate-ejb-1.jar, I tried to get the Ejb like this:

     context = new InitialContext();
     DAO dao=  (DAO ) context. lookup("java:global/xxxxxx-SNAPSHOT/xxxxxxDAOImpl!com.xxxxxx.dao.common.local.xxxxxxDAOLocal");


*DAO.java looks like this*

@Stateless
public class DAOImpl implements DAOLocal, DAORemote{

    @PersistenceContext
    private EntityManager entityManager;


          public List<Bean> findAll() {
                    Query query = createNamedQuery(Bean.FIND_ALL);
                    if(query!=null)
                              return query.getResultList();
                    return null;
          }
}

However, I have the NPE because @PersistenceContext  EntityManager entityManager  is always null.





The probleme is :
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