[Zope3-Users] zc.async in Zope2/Plone

Santiago Videla santiago.videla at gmail.com
Fri Sep 12 01:23:40 EDT 2008

Well, after some hours and many buildouts done, I couldn't get this running.

The best approach I got is like this (using repoze.plone):
1) just run the standard buildout.cfg for repoze.plone
2) add zc.async to the eggs section in the buildout and run again.
It's important to add the egg here, when I added just to the
extra-requirements in the setup.py of my egg, it doesn't work. Something
about IOBTree.family32 it's raised... sorry, I didn't copy the traceback
3) Here, the instance starts, but tests won't work. I had to edit the test
script, to move down the import of zope.testing. after that, tests are
running. Obviously, running the buildout again, will overwrite this change

I will try to keep working on this, but I have to move on these days

Now, a question about the usage of zc.async, I followed the docs in the
In my egg I have this

import ZEO.ClientStorage
import ZODB
import zc.async.configure

storage = ZEO.ClientStorage.ClientStorage(
                                ('', 8881),
db = ZODB.DB(storage, database_name='main')
zc.async.configure.start(db, poll_interval=1)


import zc.async.interfaces

def async_job():
    do something

def some_job(context):
    urltool = getToolByName(context, "portal_url")
    portal = urltool.getPortalObject()

    #portal._p_jar give us the connection to the ZODB
    queue = zc.async.interfaces.IQueue(portal._p_jar)
    job = queue.put(zc.async.job.Job(

This code it's running and it works, but I'm not sure if it's the correct
usage... Gary?

Last question, when I run my test, I'm getting this error

2008-09-12 02:20:01 ERROR zc.async.events UUID
10c69742-8084-11dd-9853-0016d3094e86 already activated in queue  (oid
44148): another process?  (To stop poll attempts in this process, set
``zc.async.dispatcher.get().activated = False``.  To stop polls permanently,
don't start a zc.async.dispatcher!)

I was reading ftesting.txt from zc.async but I yet don't understand what
should I do, any hints?

best regards

On Thu, Sep 11, 2008 at 5:51 PM, Michael Dunstan
<michael.dunstan at gmail.com>wrote:

> On Fri, Sep 12, 2008 at 5:02 AM, Santiago Videla
> <santiago.videla at gmail.com> wrote:
> > Hi guys,
> >
> >>>
> >>> z3c.recipe.fakezope2eggs lets you tame these kind of dependencies. See
> >>> http://pypi.python.org/pypi/z3c.recipe.fakezope2eggs
> >>>
> >>> plone.recipe.zope2install includes a couple of options for making use
> >>> of that too. See http://pypi.python.org/pypi/plone.recipe.zope2install
> >
> >
> > Nice, I will try those.
> >
> > But I have another issue... :(
> > I need to use repoze.plone and I don't have any zope2 section in my
> > buildout.cfg (needed to use fakezope2eggs). I need to find a way to tell
> to
> > fakezope2eggs where is the python/lib/zope directory
> I think you should be able to do that by declaring a zope2-location
> for the z3c.recipe.fakezope2eggs part.
> [fakezope2eggs]
> recipe = z3c.recipe.fakezope2eggs
> zope2-location = ...
> where ... points to your python directory of python/lib/zope
> --
> Michael Dunstan

Santiago Videla

Sigue la mata dando de que hablar siempre abajo y a la izquierda donde el
pensamiento que se hace corazón resplandece con la palabra sencilla y
humilde que l at s tod at s somos.
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