Hi all,

Scenario/Problem: Client needs to get an Entitymanager / Entitymangerfactory via JNDI.

Studying docs/wikis/forum I came up with this:

 try {
 Context context = new InitialContext();
EntityManagerFactory emf = (EntityManagerFactory) context.lookup("java:/EntityManagerFactory");
logger.debug("emf "+emf);
//manager = emf.createEntityManager();

persistence.xml:

 <persistence-unit name="mos">
 <provider>org.hibernate.ejb.HibernatePersistence</provider>
 <jta-data-source>java:/mystDS</jta-data-source>
 <properties>
 <!-- JNDI name for EntityManager+Factory (we need this for non container managed access to this PU -->
 <property name="jboss.entity.manager.factory.jndi.name" value="java:/EntityManagerFactory"/>
 <property name="jboss.entity.manager.jndi.name" value="java:/EntityManager"/>
 <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLInnoDBDialect"/>
 <property name="hibernate.hbm2ddl.auto" value="update"/>
 </persistence-unit>
</persistence>

Problem: It always returns null :(

I've also tried it that way:

 EntityManagerFactory emf2 =Persistence.createEntityManagerFactory("mos");
emf2.cerate
//manager = emf2.createEntityManager();

(and putting persistence.xml to META-INF)

but this gives this exception:

Exception in thread "main" javax.persistence.PersistenceException: java.lang.NullPointerException
 at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:173)
 at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:103)
 at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:37)
 at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:27)
 at com.ttech.myst.client.test.Test2.main(Test2.java:68)
Caused by: java.lang.NullPointerException
 at org.hibernate.ejb.packaging.PersistenceXmlLoader.deploy(PersistenceXmlLoader.java:68)
 at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:139)
 ... 4 more

For stateless/full beans getting the entitymanager
via injection works wunderful, (via @PersistenceContext(unitName="..."))
and I'm awre that calling beans in hte client rather than putting the bussinesslayer/EJB3 queries directly into the client is suboptimal, but I cant avoid it in my case :-((( (long story)


Any help would be greatly appriciated :)
thx in advance, nick