Hello, I'm thinking to use cayenne in conjunction with vaadin
(http://vaadin.com).
I'm trying to use some kind of tight integration between both frameworks
(defining cayenne generated classes which are vaadin data models
implementations).
That way I could define forms directly on data objects, querying &
mutating its state directly from vaadin widgets.
As vaadin is an stateful web framework, should I have to expect for some
kind of problem with data objects between requests? I mean, the data
objects will reside at the http session, and will be used directly by
the vaadin widgets, does this kind of cayenne data objects "use" could
arrive with attaching/detaching problems?
Also, is there a way to add metadata info in cayenne metamodel? I would
like to add constraints / validations to generated classes, so they can
be used to define searching criterias on indexed attributes (something
like active-records class filters, but only on indexed properties) and
generate model validations on properties so they can be used at UI
fields directly, facilitating the app development.
Finally, I'm looking for a multitenant implementation to use, and I
believe that the solution pointed at
http://blog.jerodsanto.net/2011/07/building-multi-tenant-rails-apps-with-postgresql-schemas/
could be also used with cayenne; is there any constraint I should look for?
Best regards
Juanjo
ps: pardon my really poor English! :P
