On 26 Nov 2007, at 19:22 , Chris Withers wrote:
(and I'm guessing there is an ISite somewhere, as I could find no
definition of setSiteManager, but how does
IComponentArchitecture's getSiteManager relate to that of ISite?)
zope.component.getSiteManager() will return whichever component
registry is active. site.getSiteManager() will return the local
component registry that has been associated with site (which
provides ISite).
Okay, what's the difference between these two registries?
Well, site.getSiteManager() will return a very specific component
registry, namely the one that's associated with the object named
'site'. zope.component.getSiteManager() will return *whichever*
component registry is the active one. Only if 'site' has been
remembered as the current site (e.g. during traversal), then both will
return the same registry.
I think I'm misreading the code in _api then. It looks to me that
most things use getSiteManager (even though the comment says it
needs to be deprecated) which always appears to return either the
global registry or do an IComponentLookup adaptation. If no
explicit context is supplied, how does anything other than the
global registry end up getting used?
getSiteManager is "overloaded" from zope.app.component. See
hooks.py. Yay for indirection :).
So zope.app.component replaces the getSiteManager implementation in
zope.component? :-(
Yes.
subscriber is in site.py. The rest of the machinery is in hooks.py.
As an aside, I assume zope.thread is needed because Zope doesn't yet
run with Python 2.5 as a whole?
Not sure I'm following you here.
zope.thread.local provides an implementation for the thread-local
variable, so that we can remember the 'site' object during traversal
in a global place, but still not interfere with other threads. Note
that this mechanism was donated to the Python stdlib and is available
already in Python 2.4 under 'threading.local'. The latest version of
zope.thread.local just refers to 'threading.local'.
Also, where's the code which, in the local registry, defers to the
global registry to find more adapters/subscribers/whatever?
Look for the __bases__ property and its dynamic setter.
I guess I'm nitpicking. I would just like to stress the focus of
the zope-dev list.
Well, I guess with splitting zope into seeprately usable components,
this all becomes a much greyer area. I'm exploring the realtionship
between components and trying to understand their implementation.
That feels like development *of* zope to me,
It doesn't to me (which doesn't have to mean anythign ;))
whereas zope3-users has felt like a list for people using "the whole
of zope 3", whatever that is nowadays...
I think zope3-users is also for the users of the separately usable
components. Well, as it turns out, they're not so separately usable
right now, at least when you're tryinig to easy_install zope.component
or so :(. But at least we're working on that.
I'd be happy to use either list and even happier to see all 3 lists
merge now that they're low volume enough (ie: just have
[EMAIL PROTECTED], rather than zope-dev, zope and zope3-users)
I think there's value in separating development from the rest of the
traffic. As far as [EMAIL PROTECTED] is concerned, I see a lot of old-
school (e.g. DTML-related) traffic there, but even though I think it'd
make sense to merge it with zope3-users.
PS: I am quite excited that it looks like I may actually be able to
use bits of zope independently, and this wsgi stuff looks pretty
cool too :-)
Cool! Be sure to let us know about it afterwards. I think we could use
some feedback on projects like this.
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