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Martin Aspeli wrote:
> Kapil Thangavelu wrote:
>> On Thu, 12 Apr 2007 06:16:23 -0400, yuppie <[EMAIL PROTECTED]>  
>> wrote:
>>
>>> Hi!
>>>
>>>
>>> Philipp von Weitershausen wrote:
>>>> yuppie wrote:
>>>> Kapil's also right when he says that utilities by principle are  
>>>> context-less components.
>>> By principle all Zope 3 code might depend on setSite to work as  
>>> expected. We just don't pass that 'site context' explicitly to the  
>>> component as in Zope 2.
>>>
>> contextual lookup is very a different notion, that context implementation  
>> dependence. utilities don't have context implementation dependencies in  
>> zope3, the majority of cmf tools do.
> 
> Just so we are clear, can anyone point to a good example of a 
> not-trivial-to-change place where CMF tools have inherent dependencies 
> on acquisition?

Security is inherently "placeful" in Zope2:  it requires being able to
verify that the logged-in user is authenticated in a user folder which
is in the "scope" of the protected resource.

As far as I'm concerned, Zope3's model is *not* intrinsically superior:
 it doesn't support the use cases of the Zope2 model at all.  Let's just
forget the "Zoep3 is better" mantra and find a workable near-term
solution here:  if we have to re-implement / tweak some Zope3 machinery
to make it "play nice" in Zope2, then let us do so, rather than
distorting both in a misguided effort at "Zope3 purity."

 - If that means continuing to use 'getToolByName' for traditional tools
  which need Zope2 security, fine;  folks who implement new utilities
  which don't need that compatibility can register them as pure
  utilities.

 - If it's easier to hack the LSM stuff to automagically wrap those
   returned  utilities which implement IAcquisitionWhatever, fine;  if
   that means in turn that folks must use the Zope2 LSM version in
   subsites, fine.

This is not "rape" by any stretch of the imagination;  this is
"adaptation" at its best.  Let's be pragmatic here, please.



Tres.
- --
===================================================================
Tres Seaver          +1 540-429-0999          [EMAIL PROTECTED]
Palladion Software   "Excellence by Design"    http://palladion.com
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