Gary Poster wrote:
Hey Chris. Ever on the lookout for better things to replace our code
(e.g., zasync), I took a look at Stepper. It looks nice and simple (as
per your company name, I suppose ;-). It's particularly nice that it
looks easier to set up than zasync.
I like things simple, hence the company name and tag line ;-)
We primarily need zasync for frequent, user-requested async tasks fired
from within a browser. From poking around in Stepper I thought maybe
one could do that with a cron job kicking stepper and some other
"some other tricks" being something in ZODB that built up a queue for a
Stepper step to process...
but it didn't seem that was a primary use case for you, because
I still think zasync would do a better job there.
Indeed, Stepper is for doing "once a day" type stuff. It was originally
developed to run sets of migration code, but is now going to be used to
do checking of Link Objects, sending reminders about expired content,
packing ZODB, etc. That said, I see no reason why it couldn't be used to
meet your use case...
To be clear, Stepper does tasks zasync couldn't;
and I think it would
be more appropriate for some of our zasync usages in the field,
particularly once you beef up the error handling.
I'm curious about this... what needs beefing up?
The class design for
defining jobs is certainly prettier than what I did too, though
arguably both approaches have advantages. I might choose your approach
for a new take on zope_exec plugin, for instance, if I did more zasync
Hmmm, what's zope_exec?
In any case, to your knowledge, am I on the right track with my
analysis of what you have done?
Yup, think so...
Does Stepper support frequent,
browser-requested async tasks, now or in your plans?
Not really, that's not its focus. But, another product could easily be
built to handle the "put jobs in a queue" thing and also supply a
Stepper step. Maybe zasync could evolve to do just that and leave the
actual offline task running (which is an admittedly pretty small task!)
I would have sent this to the zope mailing list if I subscribed; feel
free to cc responses there if you would like.
Sure, I'll CC the zope list in for kicks :-)
Simplistix - Content Management, Zope & Python Consulting
Zope maillist - Zope@zope.org
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