Hehe, it reminds me WeakArray storeOn: http://bugs.squeak.org/view.php?id=1478
There are things that won't work on anything weak anyway.

Nicolas

2010/10/10 Igor Stasenko <siguctua at gmail.com>:
> Moreover, i personally don't understand, why WeakRegistry have to be a
> subclass of Collection.
>
> What
> registry copy reject, select etc
> means to weak registry?
>
> My gut feeling that this is conceptually wrong.
> One should not use any kind of copying on weak registry.
>
> I think, that more intention revealing , one should send:
> registry discardFinalization: anObject
> instead of:
> registry remove: anObject
>
> On 10 October 2010 15:59, Igor Stasenko <siguctua at gmail.com> wrote:
>> A current implementation of this method
>>
>> remove: oldObject ifAbsent: exceptionBlock
>>        "Remove oldObject as one of the receiver's elements."
>>
>>        oldObject ifNil: [ ^nil ].
>>        ^(self protected: [ valueDictionary removeKey: oldObject ifAbsent: nil ])
>>                ifNil: [ exceptionBlock value ]
>>
>> simply removes a previously registered object from registry and voila.
>>
>> Now lets get back to our discussion about multiple finalizers per
>> object and using them in weak subscriptions etc.
>>
>> Suppose i am added a socket to weak registry,
>> and suppose i am added a weak subscription to it.
>>
>> Now, if i do 'socket close' , it tells weak registry to remove it from list.
>> And what we'll have:
>>  - socket handle is closed
>>  - socket is wiped from weak registry
>>  - but weak subscription still listed somewhere in a list of subscriptions
>>
>>
>> My suggestion is, that upon #remove:,
>> a weak registry should notify all executors that object of interest
>> are no longer takes part in finalization scheme,
>> so they should not count on receiving #finalize eventually.
>>
>> In other words:
>>
>> remove: oldObject ifAbsent: exceptionBlock
>>        "Remove oldObject as one of the receiver's elements."
>>
>>        oldObject ifNil: [ ^nil ].
>>        ^(self protected: [ | executor |
>>             executor := valueDictionary removeKey: oldObject ifAbsent: nil.
>>             executor discardFinalization.
>>         ])
>>        ifNil: [ exceptionBlock value ]
>>
>>
>> --
>> Best regards,
>> Igor Stasenko AKA sig.
>>
>
>
>
> --
> Best regards,
> Igor Stasenko AKA sig.
>
>