I'd like to run a Twisted client in Zope 2.10 (for a legacy app). How do I do that? Simply loading twisted.internet is probably not a good idea since Twisted would not work well with ZServer threads, right? One thing I tried was enabling Twisted in zope.conf but that gives me the following stacktrace (abbr): ... File "/usr/local/zope/2.10/src/Zope-2.10.7- final/lib/python/ZConfig/matcher.py", line 188, in constuct s = st.datatype(s) File "/usr/local/zope/2.10/src/Zope-2.10.7- final/lib/python/Zope2/Startup/datatypes.py", line 349, in __init__ raise ImportError("You do not have twisted installed.") ImportError: You do not have twisted installed. I've got Twisted on my Pythonpath though. TIA, peter.
could this be satisficed by putting an apache proxy in front of both zope and twisted? On Thu, Mar 5, 2009 at 6:17 AM, Peter Sabaini <peter@sabaini.at> wrote:
I'd like to run a Twisted client in Zope 2.10 (for a legacy app).
How do I do that? Simply loading twisted.internet is probably not a good idea since Twisted would not work well with ZServer threads, right?
One thing I tried was enabling Twisted in zope.conf but that gives me the following stacktrace (abbr):
... File "/usr/local/zope/2.10/src/Zope-2.10.7- final/lib/python/ZConfig/matcher.py", line 188, in constuct s = st.datatype(s) File "/usr/local/zope/2.10/src/Zope-2.10.7- final/lib/python/Zope2/Startup/datatypes.py", line 349, in __init__ raise ImportError("You do not have twisted installed.") ImportError: You do not have twisted installed.
I've got Twisted on my Pythonpath though.
TIA, peter.
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-- David Bear College of Public Programs at ASU 602-464-0424
On Thursday 05 March 2009 18:46:33 you wrote:
could this be satisficed by putting an apache proxy in front of both zope and twisted?
No, not really -- I'd like to use a client written on top of Twisted in a Zope product. So, I'd need the twisted reactor and libraries running in the Python VM that runs Zope. Which should be no problem except I suspect that I shouldn't be using the (threaded) ZServer then, because I think that would mess with twisted (which is not threadsafe for the most part). I thought if I'd switch to the twisted http server implementation that would take care of that -- no threaded ZServer, no problem. Except that doesn't seem to work as advertised, since the zope.app.twisted package is not present, and the one on PyPI seems to be geared towards Zope3, AFAICT. Is that so? Is there an alternative zope.app.twisted package for Zope2? thx, peter.
On Thu, Mar 5, 2009 at 6:17 AM, Peter Sabaini <peter@sabaini.at> wrote:
I'd like to run a Twisted client in Zope 2.10 (for a legacy app).
How do I do that? Simply loading twisted.internet is probably not a good idea since Twisted would not work well with ZServer threads, right?
One thing I tried was enabling Twisted in zope.conf but that gives me the following stacktrace (abbr):
... File "/usr/local/zope/2.10/src/Zope-2.10.7- final/lib/python/ZConfig/matcher.py", line 188, in constuct s = st.datatype(s) File "/usr/local/zope/2.10/src/Zope-2.10.7- final/lib/python/Zope2/Startup/datatypes.py", line 349, in __init__ raise ImportError("You do not have twisted installed.") ImportError: You do not have twisted installed.
I've got Twisted on my Pythonpath though.
TIA, peter.
_______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
On Thu, Mar 5, 2009 at 18:59, Peter Sabaini <peter@sabaini.at> wrote:
So, I'd need the twisted reactor and libraries running in the Python VM that runs Zope. Which should be no problem except I suspect that I shouldn't be using the (threaded) ZServer then, because I think that would mess with twisted (which is not threadsafe for the most part).
Well, then you could probably set the ZServer to only use one thread. That means you need many ZServers with a load balancer in front instead.
I thought if I'd switch to the twisted http server implementation that would take care of that -- no threaded ZServer, no problem. Except that doesn't seem to work as advertised, since the zope.app.twisted package is not present, and the one on PyPI seems to be geared towards Zope3, AFAICT.
I'm pretty sure the Zope2 implementation doesn't use zope.app.twisted. However, the Zope 2 implementation is again not thread safe, and will only work with one thread per server, so you don't actually gain anything in using it. Besides, I don't think anyone actually used it after I implemented it. Which is why it's still marked as experimental, and would probably best be removed again. -- Lennart Regebro: Pythonista, Barista, Notsotrista. http://regebro.wordpress.com/ +33 661 58 14 64
On Thursday 05 March 2009 23:33:40 you wrote:
On Thu, Mar 5, 2009 at 18:59, Peter Sabaini <peter@sabaini.at> wrote:
So, I'd need the twisted reactor and libraries running in the Python VM that runs Zope. Which should be no problem except I suspect that I shouldn't be using the (threaded) ZServer then, because I think that would mess with twisted (which is not threadsafe for the most part).
Well, then you could probably set the ZServer to only use one thread. That means you need many ZServers with a load balancer in front instead.
I thought if I'd switch to the twisted http server implementation that would take care of that -- no threaded ZServer, no problem. Except that doesn't seem to work as advertised, since the zope.app.twisted package is not present, and the one on PyPI seems to be geared towards Zope3, AFAICT.
I'm pretty sure the Zope2 implementation doesn't use zope.app.twisted.
Zope2/Startup/datatypes.py tries to import it
However, the Zope 2 implementation is again not thread safe, and will only work with one thread per server, so you don't actually gain anything in using it. Besides, I don't think anyone actually used it after I implemented it. Which is why it's still marked as experimental, and would probably best be removed again.
Hm, the default zope.conf says twisted should be supported as an HTTP server replacement -- is that a bug? Thanks, peter.
On Thu, Mar 5, 2009 at 23:51, Peter Sabaini <peter@sabaini.at> wrote:
Hm, the default zope.conf says twisted should be supported as an HTTP server replacement -- is that a bug?
If it uses the word "supported" that is a bug, yes. In any case, as mentioned, it does not solve your problem. But setting zserver-threads to 1 does. -- Lennart Regebro: Pythonista, Barista, Notsotrista. http://regebro.wordpress.com/ +33 661 58 14 64
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David Bear -
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Peter Sabaini