Hi Andre,
On Oct 12, 2010, at 3:49 PM, André Rothe wrote:
> Hello,
>
> I'm not familiar with Cayenne, so I have some question to come to a decision about the usage of Cayenne in the current project.
>
> Is it possible to use multiple databases with Cayenne? We have written some code to load JDBC driver dynamically on runtime, so we can provide additional databases without restarting the application/server. Is it possible to use such a feature with Cayenne? The database schemas are different too...
Yes, it is possible. The concept of a DataNode exists to model physical DB servers and map each one of them to a subset of the entities. Starting/stopping/changing DataNodes at runtime is an option.
> The database schemas of the application increase at runtime, is it possible to create new Cayenne-like classes at runtime?
Yes, and I think Cayenne is unique in this respect - we support a generic persistent object, so the schema can be reengineered or created by some other means in runtime:
http://cayenne.apache.org/doc30/generic-persistent-class.html
> Is there any bigger open-source project, which I can test to see Cayenne "in action"
Good question... Others may have more info on that. I can only say that Cayenne has been deployed in a number of high-end commercial applications (like nhl.com). This won't help you with code examples, but should give some assurance as to the scaleability and stability of the framework.
Andrus
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