Accessing two databases through hibernate.

[Rajendiran R. prakash]

Hi Friends,

I want to access two SQL SERVER 2000 databases in my application through Hibernate. Can anyone help me how to write the configuration file(cfg.xml) for this? Help needed urgent please............ Thanks in Advance.

[Paul Sturrock]

You will need to create a session factory for each database, so you will need two cfg.xml files. No other way around this, I'm afraid.

[Rajendiran R. prakash]

Hi Paul,

Thanks for the reply. I'm new to hibernate. How to load two cfg files in a single instance.

[Paul Sturrock]

What do you mean by "single instance"? You cannot have a SessionFactory configured to use more than one DataSource, so you need two SessionFactory instances.

[Cameron Wallace McKenzie]

Your application will end up having to SessionFactory objects, one for each database your are connecting to. When you create a SessionFactory, it will look for hibernate.cfg.xml by default, but you can tell it to look for a specific config file, such as hibernate_01.cfg.xml and hibernate_02.cfg.xml.

Be careful, though. You're object model will not be able to use Hibernate to map associated classes across databases. To do that, you would need to use something like Hibernate Shards, which hasn't quite gone ga yet.

-Cameron McKenzie

[Rajendiran R. prakash]

Hi Paul and Cameron,

I really appreciate your help. Let me try these stuffs.