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
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