[hibernate-dev] [OGM] Removing row keys from associations

[Emmanuel Bernard]

Sorry I read too fast. Indeed if you are working from the representation in memory and not considering what happened in the backend, I don’t think it should happen or as you say something is fishy (like multi-thread abuse).

On 30 Sep 2014, at 09:10, Gunnar Morling <gunnar at hibernate.org> wrote:

> Thanks for coming back on this :)
> 
> 2014-09-29 18:16 GMT+02:00 Emmanuel Bernard <emmanuel at hibernate.org>:
> I think that can happen due to the weak transactional guarantees the
> underlying backend provides.
> Why do you ask? (that is if you remember as this email is quite old -
> nothing like being stuck on a place for 12 hours to catch up ;) ).
> 
> I'm not entirely sure anymore why I asked :) Maybe I considered to guard against it using an assertion.
> 
> Does it really depend on the capabilities of the store, though? Between loading an Association and removing a RowKey from it, all is in our control (and all in one thread). So if we invoke Association#remove() for a RowKey which isn't present in the loaded Association object, it still seems fishy to me.
> 
> Note that's different from trying to remove an association row in the store actually, there it may be gone already of course.
> 
> On Wed 2014-08-27 22:40, Gunnar Morling wrote:
> > Hi Emmanuel,
> >
> > Is there any legitimate case where Association#remove(RowKey) is invoked
> > for a key which is not present in that specific association instance? Or
> > would this indicate some programming error?
> >
> > Thanks,
> >
> > --Gunnar
>