what's not to like about NH events this is exactly what you are
looking for. if you are updating a collection from an aggregate than
the model described above will work.
You are going from the data access layer to the UI. there is no magic
object to do that automatically. you will need to wire that up.
You mentioned that is' running on a background thread. therefore you
will also need to marshal the call back the UI using either
ISynchronizaInvoke or SynchronizationContext.
var children = session.get<Entity>(id).Children;
foreach(var child in children)
{
Change(child);
}
a pre/post event will pick up the changes and send a notification back
to the UI where you can tell the user about it. This does seem like a
good candidate for an event aggregator. the NH event would notify the
aggregator of the change happened. the aggregator would then publish
events to presenters that the change occurred. the presenter would
update the UI.
On Oct 27, 6:37 am, Vadgros <[email protected]> wrote:
> typo, sorry.
> meant to say - I CAN report the progress myself without the NH events.
> I just don't want to. I'd rather save a complex data structure using
> cascades and a single save() than write a method to go through
> everything inside...
>
> On Oct 27, 10:29 am, Sidar Ok <[email protected]> wrote:
>
> > >> I cant report the progress myself without the NH events.
>
> > Why can't you use events, say Pre/Post Insert ?
>
> > On Tue, Oct 27, 2009 at 9:07 AM, Vadgros <[email protected]> wrote:
>
> > > Hey.
>
> > > Thanks for the responses.
>
> > > Jason, if I'm doing something like:
>
> > > foreach(var entity in entities)
> > > {
> > > session.Save(entity);
> > > }
>
> > > I cant report the progress myself without the NH events.
>
> > > Fabio - The process runs on a different thread and nothing gets stuck.
> > > However, I hate operation that take more than several seconds and
> > > don't show the progress. If i need to save 1000 entities, I want to
> > > know when each one was saved and let the user know as well. I don't
> > > want to perform a foreach but use cascades. So far, interceptors is
> > > the only way I see and I don't like it.
>
> > > On Oct 27, 7:25 am, Fabio Maulo <[email protected]> wrote:
> > > > a ver...
> > > > you have an UI issue.
> > > > The UI hopefully is implemented using MVP.
> > > > After that you have, probably, a service layer
> > > > then some DAOs/Repositories
> > > > the DAOs/Repositories is using NHibernate
>
> > > > the solution you are looking for is ?
> > > > and it is for ? give to the user something to watch during the save ?
> > > > give him a link to youtube or perform the task in another thread, live
> > > him
> > > > continue working, and send him something when the task is done.
>
> > > > 2009/10/26 Vadgros <[email protected]>
>
> > > > > Hey.
>
> > > > > I have a scenario where I have to save lots of items to the DB and it
> > > > > takes a while. I'd like the user to get some sort of an indication of
> > > > > the progress being made. The easiest way to implement it is iterate
> > > > > over the items I need to save, save each one and report the progress.
> > > > > But I'd like to let NH do the work.
>
> > > > > The only thing I thought of was using Interceptors (each time this
> > > > > object gets saved fire another event if needed) but I don't think this
> > > > > is what they were meant to do.
>
> > > > > Am I wrong? Is there another way of doing it?
>
> > > > > Thanks.
>
> > > > --
> > > > Fabio Maulo
>
> > --
> > Sidar Ok
>
> >http://www.sidarok.comhttp://www.twitter.com/sidarok
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