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

[Mahler T. <tho...@it...>]

Hi again,

> -----Urspr=FCngliche Nachricht-----
> Von: Ranjan Bagchi [mailto:ran...@fr...]
> Gesendet: Mittwoch, 13. M=E4rz 2002 16:29
> An: Mahler Thomas
> Cc: obj...@li...
> Betreff: Re: AW: [OJB-developers] Roadmap from OJB -> ODMG API's
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> Thomas,
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> Yes -- the 2nd option (custom collection classes) is by far=20
> the prefered
> method.  Is DList a good example, or should I look elsewhere?
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DListImpl is a good point to start as overwritten methods like =
remove(...)
show you what to do.
BUT: DListImpl uses the ODMG transaction to register the removed Entry =
for
deletion.
You will have to implement your own registration mechanism. And =
DListImpl
won't help you much here...

cu,

Thomas


> Thanks for the quick response,
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> Ranjan
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> On Wed, 13 Mar 2002, Mahler Thomas wrote:
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> > Hi Ranjan,
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> > > Hi --
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> > > Perhaps this is in the docs, but I haven't seen it:  I've=20
> got a fairly
> > > useful set of persistent objects using the OJB API. =20
> However, deletion
> > > from collections (representing a 1:n mapping) isn't getting
> > > persisted.  According to the FAQ I should be using the ODMG=20
> > > API instead
> > > which will handle this.
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> > > (First off, is this right?)
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> > Yes. The PersistenceBroker does not track changes to Collections.=20
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> > You can do 2 things:
> > 1. Use the ODMG Collections DListImpl etc. They do track=20
> such changes
> > automatically.
> >    Of course you have to use ODMG Transactions then.
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> > 2. Implement your own mechanism that tracks changes to=20
> collections and uses
> > the PersistenceBroker to persist these changes.
> > (E.G. You might implement your own Collection Classes that=20
> track deletion of
> > objects)
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> > Maybe this second option is easier to implement as you=20
> won't have to change
> > so much of your existing code.
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> > HTH,
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> > Thomas
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> > > Has anyone done this readjustment?  Any caveats?
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> > > Thanks,
> > >=20
> > > Ranjan Bagchi
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> > >=20
> > >=20
> > >=20
> > > _______________________________________________
> > > Objectbridge-developers mailing list
> > > Obj...@li...
> > >=20
> https://lists.sourceforge.net/lists/listinfo/objectbridge-developers
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