[Grok-dev] Re: Triggering recurring events and executing tasks in
gary at zope.com
Thu Apr 10 07:41:22 EDT 2008
On Apr 10, 2008, at 5:08 AM, Malthe Borch wrote:
> Gary Poster wrote:
>> FWIW, I just released 1.0 of zc.async and would appreciate feedback.
> This is very interesting.
> I've recently put together z3c.indexing.dispatch with preliminary
> support for Xapian. It would be interesting to couple the two to get
> asynchronous content indexing.
> With ZCatalog I think it's difficult to meet the requirement of a
> picklable callable, at least in a Zope 2-context. I'm not sure what
> innards are.
Well, if I understand your goal, the way to handle this is to use the
closure-like ability of the Job.
Define a function in a module somewhere; module-level functions are
picklable. Have it expect an argument of the ZCatalog (or whatever is
appropriate...). Let's call the callable
``Zope.Products.MyProduct.perform_index`` and the instance we'll index
``catalog``. Use something like this.
queue = zc.async.interfaces.IQueue(context) # or get the desired queue
Now the job that will be performed asynchronously will be to call
All the functionality except for the zc.z3monitor plugins should work
fine for Zope 2, I would expect.
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