[Zope3-dev] Principal Folder How-To

[Jim Fulton]

Garrett Smith wrote:
> Roger Ineichen wrote:
> 
>>Hi Garrett
>>
>>Behalf Of Garrett Smith
>>
>>>Sent: Sunday, February 20, 2005 10:27 PM
>>>To: Stefan Marti; zope3-dev at zope.org
>>>Subject: RE: [Zope3-dev] Principal Folder How-To
>>>
>>>Make sure you register the PAU as providing IAuthentication (it's a
>>>number of interfaces down in the list, so not obvious that you must
>>>choose it).
>>
>>Can you tell me why we offer more the one (the right) inteface?
>>Is there a use case for to register a utility providing another
>>interface then the interface which was the utility developed for?
> 
> 
> You can register a utility as providing more than one interface. This is
> more theory than practice though.
> 
>>I think this is the most confusing part in the utility registration.
> 
> 
> I agree.
> 
> 
>>My uderstanding of the (only) use case is:
>>
>>I place a local utility like PAU in the service space (default or
>>tool) because I like to have local version of PAU where I can use.
>>
>>If I like to register the PAU providing another Interface nothing is
>>using the PAU and I have to write a application which lookup the
>>PAU under this(another) interface.
>>
>>Or I'm wrong?
> 
> 
> You're right. It reflects the underlying architecture, which requires a
> lot of knowledge by the user. I don't think many people like it :)

I agree.

> There was an attempt to solve some of these problems with the 'tools'
> concept, but I don't use that view and can't offer an opinion. Obviously
> we need to do some more work.

Yup.

Jim

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