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UnitOfWork events [message #491099] Tue, 13 October 2009 05:15 Go to next message
Ana Oleski is currently offline Ana Oleski
Messages: 22
Registered: July 2009
Junior Member
Hi,

I'm trying to implement a validity-check on all new objects before the unit of work commits (we have "transient" objects with negative ids that should never be put into a relationship with persistent objects but sometime they are).

I thought I would be easy: register for the preCommitUnitOfWork event and examine every object in unitOfWork.getNewObjectsCloneToOriginal().

This approach turned out to have a problem: I only find the new objects that have been explicitely registered and not those that are persisted by reachability.

I looked some more and found the postCalculateUnitOfWorkChangeSet event, which seems to be a good place to do what I want. Only it doesn't. I still don't find all new objects.

I do find them after the commit (postCommitUnitOfWork event) but this is too late, since the database already contains junk.

Of course we can put a constraint in the database and we probaby will. But it still bugs me. What is the true eclipselink way Razz to do this?

Thanx,

Ana

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Re: UnitOfWork events [message #491185 is a reply to message #491099] Tue, 13 October 2009 11:05 Go to previous messageGo to next message
James Sutherland is currently offline James Sutherland
Messages: 1834
Registered: July 2009
Senior Member
The non-registered new objects are contained in unregisteredNewObjects (uow.getUnregisteredNewObjects()), you may be able to find them there. You can also trigger them to be discovered if you call uow.assignSequenceNumbers().

You want to try using the preInsert DescriptorEvent instead.

James : Wiki : Book : Blog

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Re: UnitOfWork events [message #491390 is a reply to message #491185] Wed, 14 October 2009 08:27 Go to previous message
Ana Oleski is currently offline Ana Oleski
Messages: 22
Registered: July 2009
Junior Member
The preInsert DescriptorEvent is exactly what I've been looking for. Thank you!

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