On Mar 2, 2008, at 9:11 PM, Andrus Adamchik wrote:
3. The documentation states that when you call rollbackChanges() a
transaction the DataContext state is restored to the state it had
before. Does it do this by using "copies" of the objects it has read
or is the database re-queried?
Rollback is a local operation. No DB access is performed.
This requires a bit of explanation. While rollback operation does not
perform any DB queries, modified objects are turned into "hollow"
objects. I.e. they will be re-read from the DB lazily on the first
access... Now, with DataDomain object snapshot caching underneath the
DataContext, this still means no DB access in most cases. Still some
internal Cayenne activity will happen to restore the state.
Andrus
