Re: [mdr-users] custom implementation recycling?

Hi,

Hmm, is this an "undocumented feature"? I can't seem to find any information on this... Is there any?

Still, it seems to work, so thanks :)

Also, since I read you recently became a father, congratulations :)

Kind Regards,

Hans

On Tue, 14 Jun 2005 16:22:05 +0200
Martin Matula <[email protected]> wrote:

> SainTiss wrote:
> 
> >Apparently, it's got more to do with garbage collection being handled differently on different systems, instead of different JDK's as I erroneously thought...
> >
> >Point is, I was trying to add an attribute to the custom implementation, which is not present in the MOF model... So obviously I would need the same custom implementation be associated with the same JMI object all the time, otherwise the value of my additional attribute wouldn't be preserved...
> >
> >Unfortunately, it seems that these custom implementation wrappers can be garbage collected when there is no reference to them or their wrapped JMI object in scope. If I keep a reference to the custom implementation wrapper, then it seems like the JMI object is assigned the same wrapper if it's fetched from MDR later on... But I'm not sure if I can count on that... 
> >
> Yes, you can count on that. This is how it works.
> 
> >Also, keeping references to these wrappers isn't the most pretty solution...
> >
> >Is there a solution/workaround here?
> >  
> >
> A better solution would be to use getSlotX()/setSlotX() methods in the 
> underlying storable object to store the value of the additional 
> attribute - this way you can be sure the value is persisted with the 
> values of other modeled attributes.
> Your custom impl. code could look like this:
> 
> public void setAttribute(String value) {
>     _getDelegate().setSlot1(value);
> }
> 
> public String getAttribute() {
>     return (String) _getDelegate().getSlot1();
> }
> 
> Regards,
> Martin
> 


-- 
Hans Schippers
Research Assistant of the Research Foundation - Flanders (FWO - Vlaanderen)
http://www.win.ua.ac.be/~hschipp/
Formal Techniques in Software Engineering (FoTS)
University of Antwerp
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2020 Antwerpen - Belgium
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