Ok, back to the beginning:
> The solution that came close to working is to have a > sessionscope(flushaction.never) on application load and then save > within a transactionscope. This did not work since I am getting > "object can't be associated with more than one session" errors. I also > tried SaveCopy which worked with single object but not if it had a > hasmany relationship. The exception comes from nesting TransactionScopes. If you have only one TransactionScope, it uses the outer SessionScope and gives access to its transaction. But if you nest TransactionScopes requiring new transactions (instead of just accessing an outer transaction), the TransactionScope has to create a new SessionScope, because NH allows only one active transaction per session. Can you verify this in a simplified subset of your application? Ah, by the way: Fabio Maulo (NH-Maintainer) calls the Session-Per-Application-Pattern a "recipe for desaster"... So you better try session-per-form or session-per-thread if you have multiple worker threads. -Markus 2009/8/6 Gerdus van Zyl <[email protected]> > > I am looking for fine grained last update wins concurrency. If you > have two people update the same object but not the same field it > should work and if they update the same field the last change should > win. > > On Thu, Aug 6, 2009 at 1:06 PM, Markus Zywitza<[email protected]> > wrote: > > Is there an actual problem with not doing dynamic updates? If not, then > > remember Knuth's rules for optimizations: > > 1) Don't do it. > > 2) Don't do it yet. > > The NHiA-Book uses detached objects with multiple sessions for their > > examples. This translates directly into AR w/o SessionScope which uses a > > separate session and transaction per operation. > > -Markus > > > > 2009/8/6 Gerdus van Zyl <[email protected]> > >> > >> Hi, > >> > >> What is the recommended way of using sessionscope in a window form > >> project? (many forms open at once) > >> > >> The solution that came close to working is to have a > >> sessionscope(flushaction.never) on application load and then save > >> within a transactionscope. This did not work since I am getting > >> "object can't be associated with more than one session" errors. I also > >> tried SaveCopy which worked with single object but not if it had a > >> hasmany relationship. > >> > >> Alternatively the app works fine without a sessionscope and I can live > >> without the batching and first level cache but would like to get > >> dynamicupdate working. I have information on which properties have > >> changed so how can I share that info with nhibernate so it only > >> generates updates with the changed columns? > >> > >> thank you. > >> Gerdus > >> >> > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Castle Project Users" 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/castle-project-users?hl=en -~----------~----~----~----~------~----~------~--~---
