Sorry im probably not familiar with 'concurrency behavior' is that something i use to configure NH and if so is it in the docs?
On Wed, Sep 24, 2008 at 3:51 PM, Ken Egozi <[EMAIL PROTECTED]> wrote: > in short - NH is not doing any magic here - but using ADO.NET transactions > (which in turn use the underlying RDBMS's transactions) > > > On Wed, Sep 24, 2008 at 3:50 PM, Ayende Rahien <[EMAIL PROTECTED]> wrote: > >> Depending on too many factors. >> What is the isolation level? What is the concurrency behavior you >> specified? >> >> >> On Wed, Sep 24, 2008 at 3:44 PM, N. D. <[EMAIL PROTECTED]> wrote: >> >>> Sorry i will try to reformulate >>> say you've started a transaction and someone modifies the DB, will it >>> overwrite or exception? >>> >>> >>> >>> On Wed, Sep 24, 2008 at 3:41 PM, Ayende Rahien <[EMAIL PROTECTED]>wrote: >>> >>>> Not following. What do you mean doesn't matter? The transaction setting? >>>> Because NHibernate doesn't have different behavior based on that. >>>> >>>> >>>> On Wed, Sep 24, 2008 at 3:36 PM, ndotan <[EMAIL PROTECTED]> wrote: >>>> >>>>> >>>>> thanks for the very quick answer ayende >>>>> can you elaborate why the model doesnt matter? >>>>> >>>>> >>>>> On Sep 24, 3:33 pm, "Ayende Rahien" <[EMAIL PROTECTED]> wrote: >>>>> > On Wed, Sep 24, 2008 at 3:27 PM, ndotan <[EMAIL PROTECTED]> wrote: >>>>> > >>>>> > > hey guys i was presenting NH, and got some questions.. >>>>> > >>>>> > > 1. what happens if DB not support transactions and im trying a >>>>> > > transaction >>>>> > >>>>> > An exception is thrown. NHibernate mandates the use of transactions. >>>>> > >>>>> > > 2. is the transaction model pesimistic? >>>>> > >>>>> > Doesn't matter. >>>>> > >>>>> > >>>>> > >>>>> > > 3. when i use session.Get twice in a row, NH doesnt query the DB >>>>> again >>>>> > > and gives me the same instance, >>>>> > > when does NH know to go to the DB and update that entity? how >>>>> does >>>>> > > it know that the database row was changed in order to go to the DB? >>>>> > >>>>> > It get it from the session first level cache. It doesn't go to the DB >>>>> and >>>>> > you'll get stale object exception if you setup concurrency right and >>>>> someone >>>>> > changed the row underneath you >>>>> > >>>>> > > sidenote(slightly offtopic, but it came up in the presentation): >>>>> > > is MS entityframework with oracle a fiction? >>>>> > >>>>> > I haven't seen or heard anything about it. It may exists, though. >>>>> >>>>> >>>> >>>> >>>> >>> >>> >>> >> >> >> > > > -- > Ken Egozi. > http://www.kenegozi.com/blog > http://www.musicglue.com > http://www.castleproject.org > http://www.gotfriends.co.il > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
