Avi,

	that helped !... Comment: speed is not critical here because it
has to be sent only at index creation time (once).

	By the way, this indexes are in fact HomogeneousIndex, because
the nature of the method wrappers that do not tolerate heterogenity.
Because of that I've made a IndexedCollection subclass called
HomogeneousIndexedCollection. This will be more efficient (I hope) but
it only can store objects of the same class. The intention is to also
have the IndexedCollection (who uses a proxy, minimal object, DNU, etc
approach) with some lesser efficience but tolerating heterogenity.

	I put the methodwrapper in the index, so the lifetime of the
wrapper will be in sync with the lifetime of the index who want's to be
arawe of that method call. I made a Registry class var in the indexes so
they can receive a #finalize call when garbage collected, so they can
uninstall the wrapper before disapear. I'm not completely convinced of
this approach. Why they are not GC at once, and the wrapper uninstalled,
when a workspace script variable that is the only who knows the
collection is set to nil? (they actually do but I only see it after
sending Smalltalk garbageCollect) What do you think? When do you think
the uninstallation of the methodWrappers should be done? There are
others/best approach you can see?

	best regards,

Sebastián Sastre
 
ssastre at seaswork.com.ar 
Seaswork 
Special Software Solutions
www.seaswork.com.ar

	 

-----Mensaje original-----
De: squeak-dev-bounces at lists.squeakfoundation.org
[mailto:squeak-dev-bounces at lists.squeakfoundation.org] En nombre de Avi
Bryant
Enviado el: Jueves, 30 de Septiembre de 2004 17:53
Para: The general-purpose Squeak developers list
Asunto: Re: Relative independence of odbs: IndexedCollection,the update
problem



On Sep 30, 2004, at 10:15 PM, Sebastian Sastre wrote:

>
> 	In your previous email you said that the system can know wich
methods 
> modify a defined instVar by scanning the bytecode. As I never make 
> somethig like that I ask you to explain me a little more about this.

Probably the easiest is to use Behavior>>whichSelectorsStoreInto:.  It 
only does the search for a specific inst var, but you can either send 
it once for each inst var in the class, or modify it to search for any 
stores (which would be faster).

Avi


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