Hi guys..

Some hibernate help required. We are trying to use CMT with WebLogic 8.1 and Hibernate 3.0 , but ran into some issues.
Hibernate version: 3.0


Listing down the doubts/queries that I have:

1. <property name="hibernate.transaction.factory_class"> . Should this be mapped to org.hibernate.transaction.CMTTransactionFactory or org.hibernate.transaction.JTATransactionFactory? Hibernate documentation says tha JTA can be used for both and CMT only for CMT. What is recommended best ?

2. When using CMTTransactionFactory and the property for lookup as:
<property name="hibernate.transaction.manager_lookup">org.hibernate.transaction.WeblogicTransactionManagerLookup</property>
we face the following error:

java.rmi.RemoteException: EJB Exception: ; nested exception is:
java.lang.ExceptionInInitializerError
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:290)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:248)
at com.eds.edscs.sam.wl.ejb.TestBean_kzv2am_EOImpl_815_WLStub.saveAddress(Unknown Source)
at com.eds.edscs.sam.wl.ejb.TestCISClient.main(TestCISClient.java:235)
Caused by: java.lang.ExceptionInInitializerError
at com.eds.edscs.sam.util.HibernateUtil.<clinit>(HibernateUtil.java:27)
at com.eds.edscs.sam.wl.ejb.CISInterfaceBean.saveAddress(CISInterfaceBean.java:62)
at com.eds.edscs.sam.wl.ejb.TestBean_kzv2am_EOImpl.saveAddress(TestBean_kzv2am_EOImpl.java:45)
at com.eds.edscs.sam.wl.ejb.TestBean_kzv2am_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:492)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:108)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:435)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:430)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:35)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)
Caused by: org.hibernate.HibernateException: The chosen transaction strategy requires access to the JTA TransactionManager
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:311)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1180)
at com.eds.edscs.sam.util.HibernateUtil.<clinit>(HibernateUtil.java:24)
... 12 more

What are we missing ?

Code for hibernate util
private static final SessionFactory sessionFactory;

static {
try {
/* Create the SessionFactory*/
sessionFactory = new Configuration().configure().buildSessionFactory();
} catch (Throwable throwable) {
System.out.println("Initial SessionFactory creation failed.");
throw new ExceptionInInitializerError(throwable);
}
}

public static final ThreadLocal session = new ThreadLocal();

/**
* This method returns the currentSession of the Thread.
* @return Session
* @throws HibernateException
*/
public static Session currentSession() throws HibernateException {
Session sessionNew = (Session) session.get();
/* Open a new Session, if this Thread has none yet*/
if (sessionNew == null) {
sessionNew = sessionFactory.openSession();
session.set(sessionNew);
}
return sessionNew;
}

/**
* This method close the session
* @throws HibernateException
*/
public static void closeSession() throws HibernateException {
Session s = (Session) session.get();
s.getTransaction().commit();
session.set(null);
if (s != null)
s.close();
}




Any help in form of solutions, pointers etc would be gladly accepted.

Thanks
Rachit

I forgot to append the hibernate.cfg.xml, here it is:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>

<property name="hibernate.connection.datasource">/jdbc/Sam_data_source</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property>
<property name="showsql">true</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.CMTTransactionFactory</property>
<property name="hibernate.transaction.manager_lookup">org.hibernate.transaction.WeblogicTransactionManagerLookup</property>
<property name="hibernate.current_session_context_class">jta</property>
<property name="cache.provider_class">
org.hibernate.cache.NoCacheProvider
</property>
<mapping resource="Address.hbm.xml"/>
</session-factory>
</hibernate-configuration>

Hi
After much deliberation, we found out that we need to set the following in the hibernate.cfg.xml for solving this:

<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
<property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.WeblogicTransactionManagerLookup</property>
<property name="hibernate.transaction.flush_before_completion">true</property>
<property name="hibernate.transaction.auto_close_session">true</property>

This tells hibernate to use the container's transaction.