Application running both Hibernate 2 and 3

Harishankar · **Posted:** Thu Nov 02, 2006 4:16 am

Hi friends,
Has anyone used both these versions together in a single application. I need to use Hibernate 3 from inside a Hibernate 2 installation - any clues/ints/pointers really appreciated.

Regards
Harish

kochcp · **Posted:** Thu Nov 02, 2006 9:54 am

hibernate3 has different path names. hibernate2 stuff is all reached via net.sf.hibernate.* and hibernate3 stuff is all reached via org.hibernate.*

Harishankar · **Posted:** Thu Nov 02, 2006 4:44 pm

Hi Chris,

The problem arises when using hibernate 2 and 3 is to share the hibernate.properties file which contains :

hibernate.transaction.factory_class=org.hibernate.transaction.JTATransactionFactory
hibernate.transaction.manager_lookup_class=org.hibernate.transaction.JBossTransactionManagerLookup

Regards
Harish

kochcp · **Posted:** Thu Nov 02, 2006 4:53 pm

you'll have to load up the config files manually via the Configuration class. There is a configure method where you can specify the prop/xml file to be loaded.

http://www.hibernate.org/hib_docs/v3/ap ... ation.html

Harishankar · **Posted:** Fri Nov 03, 2006 4:12 am

Thanks Chris that now works.

Harishankar · **Posted:** Fri Nov 03, 2006 10:41 pm

Hi ,
Can anyone help me with this?

Trying to execute a db transaction to another application using Hibernate 3 ORM objects from within a Hibernate 2 installation.
Have configured a hibernate.cfg.xml file to for the Hibernate 3 session initialization.
In the application the hibernate 3 session creation and invokation happens after a hibernate 2 session and mappings are already loaded by the server. But the application always reads from the hibernate.properties file meant for Hibernate 2 to retrieve the ConnectionProvider, even though the application loads the hibernate 3 properties correctly, which then throws a ClassCastException :

18:08:52,333 INFO [STDOUT] [18:08:52,333] [FATAL] org.hibernate.connection.ConnectionProviderFactory - Could not instantiate connection provider
java.lang.ClassCastException
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:73)
at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:56)
at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:366)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:60)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1859)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1152)

Regards
Harish