Persistence context isnt propograte in the same transaction

avihaimar77 · **Joined:** Wed May 02, 2007 2:42 pm **Posts:** 101

Hey,

I work with JBoss 4.2.

I create entity manager and use it to persist hotel.
Than i create additional entity manager and use it to find the hotel that i saved with the first one.

I get null (it didnt find it), unless i call to flush on the first one.

According to the spec in JTA env the persistence context is bound to the transaction.

Thank you.
p.s - dont say injection. i cant use injection.

I wrote a stataless bean:

Code:

@Stateless
@Local(HotelService2.class)
@Remote(HotelService2.class)
public class HotelServiceBean2 implements HotelService2 {

and in the stateless i have the following method:

Code:

   public void createEntityManagerFactory() {
      try {
         FactorySingleton.getInstance();
         EntityManagerFactory emf2 = (EntityManagerFactory) new InitialContext().lookup("java:/DemoEMF");
         EntityManager em = emf2.createEntityManager();
         Hotel hot = new Hotel("ab","");
         em.persist(hot);
         //em.flush();
         EntityManager em2 = emf2.createEntityManager();
         Hotel foundHot = em.find(Hotel.class, hot.getOrmID());
      } catch (Exception e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
      }

   }

Code:

<persistence>
  <persistence-unit name="Demo">
    <jta-data-source>java:/InsiteDS</jta-data-source>
    <properties>
            <property name="hibernate.transaction.factory_class" value="org.hibernate.ejb.transaction.JoinableCMTTransactionFactory"/>
      <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
      <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultComponentSafeNamingStrategy" />
    </properties>
  </persistence-unit>
</persistence>

[/code]

emmanuel · **Posted:** Tue Aug 07, 2007 2:04 pm

Like you did, you need to explicitly flush. Those are 2 different EMs.

avihaimar77 · **Joined:** Wed May 02, 2007 2:42 pm **Posts:** 101

I saw that some one rewrite the class for this.

Is it correct -
We have here two entity manager which share the same JDBC connection and the same transaction, but not share the same persistence context.

avihaimar77 · **Joined:** Wed May 02, 2007 2:42 pm **Posts:** 101

I create the factory like this:

Code:

         EntityManagerFactory programmaticEmf =
             Persistence.createEntityManagerFactory("Demo",configOverrides);
         managedEntityManagerFactory = new ManagedEntityManagerFactory(programmaticEmf,"");

Than in order to get the entity manager -

Code:

em = entityManagerFactory.getTransactionScopedEntityManager();

What suppose to be in the kernelName field in the constructor of ManagedEntityManagerFactory?

Thank you