[Zope-dev] Re: [Plone-developers] PAULA: bringing Zope 3's authentication to Plone and beyond

[Philipp von Weitershausen]

Tres Seaver wrote:
> Mark Hammond wrote:
>>> Well, Zope moved onwards from PAS to PAU
> 
> I doubt that seriously:  I would venture that there are two orders of
> magnitude more users of PAS than PAU in production deployments.  PAU was
> an attempt to port the PAS to a "component-centric" implementation, but
> it lost at least a couple of key features along the way:  most notably,
> the ZCA provides no way to control the ordering of the invocation of the
> plugins.

The ZCA may have no built-in way to control the ordering, but PAU surely 
does control the ordering. It keeps an ordered list of plugin names. 
These plugins can either be contained items in the PAU (like in PAS) or 
utilities for ICredentialsPlugin or IAuthenticatorPlugin.