You use JTA transactions, that way different services
can join in on the transaction. You open a JTA transaction in the beginning of
the request, all your services/daos use that transaction, and at the end of the
request you either commit or roll back.
-Igor
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Veentjer - Anchor Men
Sent: Monday, August 01, 2005 7:30 AM
To: [email protected]
Subject: [Wicket-user] Hibernate and Transactions (again)I have another question about the length of a Hibernate transaction and wicket.Normally you have a request->the model is re-attched->method call (maybe go to some service to do some saves) -> render view.How do you coordinate the transaction that is to re-attach the model? If you have a service, the service probably has his own transaction, but the reattachement needs his own transaction also. A Session that isn`t protected by some kind of transaction to do reads from the database could give some strange results. How do you deal with this?And what if you don`t need a service, but you have a form, and the data in the form is valid and can be submitted directly to a dao (a seperate service layer for very-small application is imho quite useless). Do you work with a single transaction to do the reattachement and the same transaction for the dao.save. Or do you make different transactions?And what if a page activates another page? The other page his model must be reattached (so it needs a session/transaction). Where does he get het transaction from? Do you make a big transaction for the complete request so that everybody has a good transaction they can use?As you can see there are a lot of questions about how to use Hibernate with something like wicket and we want to understand how to deal with these situations so we can help other programmers at our company as soon as we switch from maverick to Wicket/Tapestry (Wicket has the most chance btw). I hope somebody can answer my questions.Met vriendelijke groet,
Peter Veentjer
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