Hello Heiko, Please tell me few things 1. Does the Lock object declare a reference to the entity it is supposed to lock? 2. Can the entities declare a reference to a Lock object?
The above questions basically to understand whether the persistent domain model will allow a relationship between Lock and Locked object. If it does, can that relation be bi-directional or uni-directional? If only uni-directional what is the directionality (or as JPA calls it: who owns the relation?). 3. Looks like the application prefers to create and delete Lock object themselves as opposed to modify/update a lock object. I prefer that a Lock object be modified when it relinquishes its lock on A and grabs control of B. In your application, it seems that LockA object will be destroyed/deleted and new LockB object will be created. Please explain for my understanding why you preferred the create+delete style over modify. Once I hear the response, I will offer my $0.02 ----- Pinaki Poddar Chair, Apache OpenJPA Project -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-1-2-EntityExistsException-on-em-persist-for-Entity-that-is-no-longer-present-in-DB-tp6819702p6849229.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
