AFAIK no such thing exists as of now. Not sure about others, but
luckily I was spared from any such migrations. Would be nice if
somebody with a real experience could document what they needed to do.
My guess on the high level approach would be to start with reverse
engineering the DB schema, and generating Cayenne superclasses with
Hibernate current classes mapped as subclasses. And then fix the API
calls manually. But I am sure there are quirks for non-flat mapping
scenarios (inheritance and such). Also you may need to rethink some
app concepts... E.g. Cayenne doesn't force transactions on you unless
you *must* have them... things like that.
Andrus
P.S. When I was about to hit "send", I noticed a message from Scott
Anderson, based on the same idea.
On Feb 20, 2008, at 9:08 PM, Thomas Bernhard wrote:
Hi,
Is there a migration guide from Hibernate(especially 2.x.x) to Cayenne
(whatever version)?
Or even better, is there maybe some tool that helps this even further?
(when moving from Velocity to Freemarker there's a tool to automate
this,
and even other frameworks have "migration" tools to help uses move
from the
concurrence :) )
Thank you,
Tom.
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