I've done so much stuff that I can't even reproduce this issue when I checkout the project and try to modify it.
Here is a list of things I've done:
-The project already had hibernate. It had a hibernate3.jar that I figured out was hibernate-3.6.0-CR2. I replaced it with hibernate-core-3.6.10.Final.jar. The code ran fine.
-Added ehcache-core-2.4.3.jar and hibernate-ehcache-3.6.10.Final.jar, and the code worked fine.
-Added the following lines to the project's config file in the <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> bean, under <property name="hibernateProperties">
and I get the error java.lang.ClassNotFoundException: net.sf.ehcache.hibernate.EhCacheRegionFactory cannot be found
I still have a copy of the project with the original exception (java.lang.ClassNotFoundException: org.hibernate.MappingException not found), but I do not know why I cannot reproduce this error when I redo these steps.
Another question I had is which of these should I use?
<prop key="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</prop>
or
<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
?
If I use the second property, I get the error java.lang.ClassNotFoundException: net.sf.ehcache.CacheException cannot be found