Problem configuring sessionFactory

gpani · **Posted:** Sat Jul 24, 2004 11:48 pm

Hi,

I am using Hibernate 2.1.2 with MySQL 4.1 on Resin 2.1.12. This is my first attempt at using Hibernate with MySQL and I have done pretty much the same things that I did with my previous implementation on SAPDB.

Code:

<property name="hibernate.connection.datasource">java:comp/env/hibernate/mysql/test</property>
<property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="transaction.factory_class">net.sf.hibernate.transaction.JDBCTransactionFactory</property>
<property name="hibernate.cache.provider_class">net.sf.hibernate.cache.HashtableCacheProvider</property>
<property name="hibernate.cglib.use_reflection_optimizer"> false</property>

It is using a Resin connection pool which works fine when using straight JDBC to get data from the DB.

Here is the code in my HibernateManager class.

Code:

static
{
  try
  {
    /**
     *  File name need not be specified here. By default hibernate.cfg.xml is
     *  chosen. However, if the file name is changed in the application, it
     *  will need to be modified here
     */

     logger.debug("loading session factory.");
     sessionFactory = new Configuration().configure().buildSessionFactory();
      logger.debug("Successfully created sessionFactory");
    }
    catch (HibernateException e)
    {
      logger.error("HibernateException building SessionFactory: " + Utilities.getStackTrace(e));
      throw new RuntimeException("HibernateException building SessionFactory: " + Utilities.getStackTrace(e), e);
    }
  }

The problem I have is that while the first logger gets written out, it never gets to the second logger and I don't get a HibernateException thrown.

I have the the following setup in my Log4J file but I am not getting any log entries which leads me to believe that Hibernate isn't getting initialized.

log4j.logger.net.sf.hibernate=DEBUG

Obviously, I am doing something really stupid and basic and even though I have been trying to figure it out the entire day I have had no success. Any help is greatly appreciated.

TIA

gpani · **Posted:** Sun Jul 25, 2004 1:11 am

Is there anything obvious that I am missing? I have tried everything recommended on the link below.

http://www.hibernate.org/hib_docs/refer ... ation.html

christian · **Posted:** Sun Jul 25, 2004 1:18 am

Sorry for this bug in the HibernateUtil. Try this:

Code:

   // Create the initial SessionFactory from the default configuration files
   static {
      try {
         configuration = new Configuration();
         sessionFactory = configuration.configure().buildSessionFactory();
         // We could also let Hibernate bind it to JNDI:
         // configuration.configure().buildSessionFactory()
      } catch (Throwable ex) {
         // We have to catch Throwable, otherwise we will miss
         // NoClassDefFoundError and other subclasses of Error
         log.error("Building SessionFactory failed.", ex);
         throw new ExceptionInInitializerError(ex);
      }
   }

http://caveatemptor.hibernate.org/

gpani · **Posted:** Sun Jul 25, 2004 1:40 am

Thanks for the prompt response. I also noticed that I didn't have dom4j.jar in my classpath. Once I added that I started getting some logging. Let me try out your change request and get back to you.

gpani · **Posted:** Sun Jul 25, 2004 1:48 am

christian, thanks for your help. Using the Throwable told me precisely what my problem was, which was, yet again, a missing jar file. Specifically the cglib jar.