Hello, I'm having a bit of a problem trying to run a little test app using Hibernate.

My test app code is as follows:

package com.reallm;

import java.util.HashSet;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class NavMenuTest
{public static void main(String[] args) throws Exception
{//Create the Hibernate Configuration and populate it with our classes
Configuration config = new Configuration();
config.addClass(SubMenuItem.class)
.addClass(SubMenu.class)
.addClass(Menu.class)
.addClass(NavMenu.class);

//Grab a session and reserve a variable to reference a Transaction
SessionFactory sessionFactory = config.buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction tx = null;
try {//Create the Transaction
tx = session.beginTransaction();

//Create and populate a SubMenuItem object
SubMenuItem subMenuItem = new SubMenuItem("My first test!",
"tester",
"test"
);

//Add the SubMenuItem object to a SubMenu
HashSet<SubMenuItem> subMenuItemHashSet = new HashSet<SubMenuItem>();
subMenuItemHashSet.add(subMenuItem);
SubMenu subMenu = new SubMenu("Test SubMenu", subMenuItemHashSet);

//Add the SubMenu to a Menu
HashSet<SubMenu> subMenuHashSet = new HashSet<SubMenu>();
subMenuHashSet.add(subMenu);
Menu menu = new Menu("My Test Menu", subMenuHashSet);

//Add the menu to a NavMenu
HashSet<Menu> menuHashSet = new HashSet<Menu>();
menuHashSet.add(menu);
NavMenu navMenu = new NavMenu("My first test NavMenu", menuHashSet);
session.save(navMenu);
tx.commit();
}
catch(Exception e)
{if(tx != null) {tx.rollback();}
throw e;
}
finally {session.close();}
sessionFactory.close();
}
}
>>>ERROR
Exception in thread "main" java.lang.ExceptionInInitializerError
at com.reallm.NavMenuTest.main(NavMenuTest.java:13)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) (Caused by org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException))
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:110)
... 1 more
Caused by: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException)
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:397)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
... 5 more
Caused by: java.lang.NullPointerException
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:374)
... 6 more

>>>ERROR

Hibernate version: 3.0

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

Sorry about that! I'm not sure wha thappened. . . I pressed TAB to indent my source code, there was a pause, and then my post was submitted!

Anyway, my code and error are listed in the previous mesage.

I am using Hibernate Tools 3.1.0-beta1 in Eclipse 3.1.1 running JDK 5.0.
U have several Libraries on my project's classpath, and among them I have log4j-1.2.12. I also have commons-logging-1.0.2 and commons-logging-1.0.4 in two of my other classpath libraries.

THe Hibernate Configurations view shows that my Configuration, Sessions Factory, and Database are fine. I'm not sure if the Configuration part of the Hibernate COnfigurations view and the Configuration Object I construct in my code are related, but it seems like if the Configurations view can find what it needs my test app should be able to as well.

BTW, my hibernate.cfg.xml file is located in $PROJECT_ROOT/(src && bin)/hibernate.cfg.xml.

If you need anymore info please let me know. I'm new to Hibernate and database design in general, so I've been having kind of a tough go so far.

Thanks a lot for your help!

Bryan