Since that interface was created by the author of the article, you'll
probably have better luck asking him how it's supposed to be used...
Diego
On Mon, Sep 20, 2010 at 10:39, epitka <[email protected]> wrote:
> There is a IOneShotDeleteHandler interface that is apparently for
> deleting collections in one shot, hence the name. Instead of NH
> issuing delete statement for each item in the collection, one can
> implement this interface and than execute delete as one sees fit.
> Kinda like cascade deletes, but in NH rather than in db. There was one
> post on elegant code about it, but the implementation does not work as
> expected for us. It works fine for just one collection, but not for
> many. Here is the link
>
> http://elegantcode.com/2009/07/19/nhibernate-2-1-and-collection-event-listeners/
>
> What happens with this implementation is that PreCollectionRemoveEvent
> executes OneShotDeleteHandler for each type defined in the
> ForChildEntities().
>
> What we need to achieve is following. We have a veryyyyyy deep object
> graph, levels upon levels, each containing 100 or more items and we
> need to delete a root item. Going through NH with regular removal from
> the collections and all-delete-orphan creates 1000's (literally) of
> delete statements, locking our whole system, and reducing system
> basically to one user system. Dead locks everywhere. To give you more
> background (and no, this is not something that I can affect, decision
> has been made before), every delete triggers a possibly more triggers
> etc, to keep old and new db in synch. Everything goes through views
> (inserts,updates, deletes) and so on and so on....
>
> I tried implementing delete listener, gathering all ids and entity
> types that I need to delete, and basically executing about 12-15
> deletes with IN clause, but I cannot stop NH from generating deletes
> too, because of the all-delete-orphan, which we also need. Please
> help...
>
>
>
> On Sep 19, 8:45 am, Jason Dentler <[email protected]> wrote:
> > I don't know what that is either, but I assume you're getting a
> concurrency
> > exception (StaleState or something like that - I forget).
> >
> > Executable HQL doesn't affect anything in memory. Period. I guess you'll
> > need to evict those affected items from the session.
> >
> >
> >
> > On Fri, Sep 17, 2010 at 2:37 PM, Fabio Maulo <[email protected]>
> wrote:
> > > What is OneShotDeleteHandler ?
> >
> > > On Fri, Sep 17, 2010 at 11:46 AM, epitka <[email protected]>
> wrote:
> >
> > >> Anybody knows how to suppress NH from issuing deletes of the entities
> > >> that I already deleted using HQL delete query in OneShotDeleteHandler?
> >
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> >
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