Re: AW: [OJB-developers] Roadmap from OJB -> ODMG API's

[Ranjan B. <ran...@fr...>]

Thomas,

Yes -- the 2nd option (custom collection classes) is by far the prefered
method.  Is DList a good example, or should I look elsewhere?

Thanks for the quick response,

Ranjan

On Wed, 13 Mar 2002, Mahler Thomas wrote:

> Hi Ranjan,
> 
> > Hi --
> > 
> > Perhaps this is in the docs, but I haven't seen it:  I've got a fairly
> > useful set of persistent objects using the OJB API.  However, deletion
> > from collections (representing a 1:n mapping) isn't getting
> > persisted.  According to the FAQ I should be using the ODMG 
> > API instead
> > which will handle this.
> > 
> > (First off, is this right?)
> > 
> 
> Yes. The PersistenceBroker does not track changes to Collections. 
> 
> You can do 2 things:
> 1. Use the ODMG Collections DListImpl etc. They do track such changes
> automatically.
>    Of course you have to use ODMG Transactions then.
> 
> 2. Implement your own mechanism that tracks changes to collections and uses
> the PersistenceBroker to persist these changes.
> (E.G. You might implement your own Collection Classes that track deletion of
> objects)
> 
> Maybe this second option is easier to implement as you won't have to change
> so much of your existing code.
> 
> HTH,
> 
> Thomas
> 
> > Has anyone done this readjustment?  Any caveats?
> > 
> > Thanks,
> > 
> > Ranjan Bagchi
> > 
> > 
> > 
> > 
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> 
>