I have a utility/admin application which uses multiple data nodes and I didn't really do anything special. Cayenne knows which DataNode (and therefore DB connection) to use by which DataDomain your DataContext is connected to and which Java classes (CayenneDataObject) you are using. So if you have a User in one DataNode and an Invoice in another, Cayenne will handle that just fine. Selects/inserts/updates/deletes will occur across the different connections and I believe (never tried it) that relationships across the different DBs will work fine, too.
/dev/mrg
-----Original Message-----
From: Joćo Paulo Vasconcellos [mailto:vasconcello..mail.com]
Sent: Tuesday, February 15, 2005 11:18 AM
To: cayenne-use..bjectstyle.org
Subject: Multiple DataNodes
Hello list,
I'm working with a legacy system that has information spread across
3 databases. My Apllication needs to access the 3 dataNodes. In the
modeler, I created the 3 nodes, 3 maps and inported the db schema.
My question is: Do I need any special treatment to work with 3
different dataNodes? If so, what should I be aware of? Is there some
placece in the docs where I can find it, aside from the customer ASP
example (because I think this is a different setup)?
Thanks,
-- Joćo Paulo Vasconcellos ICQ: 123-953-864
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