April 2005 - Zope - Zope lists

What is Flash Communication Server and Help
by Birol BI�AKLI 26 Apr '05

26 Apr '05

Macromedia Flash Communication Server MX is a server based platform for creating and deploying compelling, interactive web-based audio/video applications such as video on demand, live event broadcasts, webcam chat, and real-time collaboration applications. This software includes fine properties but, I started to think there is not any open source software that includes all of these features. So, I decided to get a software that makes only audio/video streaming for now. It must communicate two or more clients by doing live broadcasts. If you know any "open source" software which has minimum this property and can be run in Zope applications, please suggest me.

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Zope IMAP Server
by Santi Camps 26 Apr '05

26 Apr '05

*Hi all, I'm searching about some implementation of a Zope IMAP Server, if exists. I've found some thinks here: http://www.zope.org/Members/chrisw/ZopeEmail/ZopeAsServer/wikipage_view Anybody knows something about some implementation ? Thanks Santi Camps *

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Memorysegment error in Zope
by Max M 26 Apr '05

26 Apr '05

I am writing an Imap client. The Imap server (Groupwise) I connect to is really slow at accepting logins. So I have made a connection pool where I store the open connections to the server. But once in a while I get a memory segment error on the server and it crashes. I suspect what happens is that a connection has been idle for to long, ad the connection dropped by the imap server. Which might cause some memory to be freed that is then accessed when I call noop(). It could also be be some kind of threading problem. Does any of you hav an ide as to how I can find out? I am not used to these kind of problems, having been spoiled by Python for too long. regards Max M I have attached the connection pool code in the bottom. ########################################## # a borg/singleton for pooling connections. # Necessary as login can take a looong time class ConnectionPool: __shared_state = {} def __init__(self): self.__dict__ = self.__shared_state def getConnection(self, server_uri, user, password): if not hasattr(self, 'connections'): self.connections = {} user_key = (server_uri, user, password) user_connections = self.connections.setdefault(user_key, []) # first try and return a connection from the pool for i in range(len(user_connections)-1, -1, -1): # a connection can be timed out, # try noop to see if it's still open connection = user_connections[i] try: connection.noop() return user_connections.pop(i) except: # else login again user_connections.pop(i) # if no usable connections in the pool, # create new one and return it return Imap4Connector(server_uri, user, password) def release(self, connection): # take the connection and put it in the pool user_key = (connection.server_uri, connection.user, \ connection.password) user_connections = self.connections.setdefault(user_key, []) user_connections.append(connection) -- hilsen/regards Max M, Denmark http://www.mxm.dk/ IT's Mad Science

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Looking for a Python / Zope Programmer in Peru
by Remy Pinsonnault 25 Apr '05

25 Apr '05

Sorry if it is not the right list for this but we are looking for two Python / Zope programmers for a one year contract in Lima. If you know anyone interested please send your resumes off-list. Thanks Remy Pinsonnault

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Wanted Support For "Communication Server" Works with/on Zope
by Birol BI�AKLI 25 Apr '05

25 Apr '05

Hello dear zope community, I am Birol from Istanbul Technical University (ITU) in Istanbul-Turkey. I am a new Zope user and don't know so much about Zope and its products. I work with Zope on Linux and also use Python. I need a communication server that works with/on Zope like Flash Communication Server. I have been searched the internet since last week but couldn't get enough information about this. I want an "Open Source" communication server program like that what Flash Communication Server does. If you help me about this subject, I would be very happy, I wait your answers. Thank you for your interests. Birol BIÇAKLI

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Zope Starting Error
by Jonathan Goldberg 25 Apr '05

25 Apr '05

Can someone please help me resolve the following error: Error: The object named by "DBTab.ClassFactories.autoClassFactory" could not be imported (line 903 in file:///home/jgoldberg/my_zope/etc/zope.conf) For help, use /opt/Zope-2.7/lib/python/Zope/Startup/zopectl.py -h Thank you, Jonathan Goldberg

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high loads, more threads, spinning wheels
by Tim Middleton 25 Apr '05

25 Apr '05

I've been doing some simple load tests on a zope application, and I've found when i increase the zserver-threads in zope.conf very much the zope server goes into some sort of cycle where it eats 100% cpu and refuses to any future requests until restarted. The load test is simply a small threaded python script that flings up to 50 "simultaneous" random queries at the zope app. (The app is basically a search engine, using tsearch2 on postgresql... the tester flings random words at it as arguments; everything is dynamic for this test, no ram-cache objects, etc -- the database queries themselves seem to maintain very quick responses, the server seems to bog down more in the template rendering, or whatever else, after the data is returned). The zserver is behind apache (using mod_rewrite proxy). The single zserver is using a ZEO server (via localhost) for storage. The test seems to run okay with up to around 7 or 8 threads; the more threads are added the sooner the server seems to gum up. 10 is a bit flaky. Sometimes the tests fail, some complete (around 5000 requests). 12 more consistently, and sooner, gets stuck. And so on. I've twiddled with various config file settings such as the various cache settings and whatnot; not really knowing what they are, i tend to just increase them and see what happens. I'm wondering if someone who knows the internals more might have some idea what's going on here. Or any tips on how to debug what zope is doing when it gets into this state. This is Zope 2.7.5 (on FreeBSD, Python 2.3.4). -- Tim Middleton | Vex.Net | I have lived through whole tragedies x(a)veX.net | VexTech.ca | without speaking a word. --Dost. (GC)

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Sequence sorting module from a Python script
by Leticia Larrosa 25 Apr '05

25 Apr '05

Hi all: I want to order a sequence using the Sequence sorting module from a Python script. I have the following code: " seq = [['Bruzon', 'CUB'], ['Anand', 'IND'], ['Kasparov', 'RUS']] def test(oneElem, twoElem): if oneElem[0] == twoElem[0]: return 0 elif oneElem[0] > twoElem[0]: return 1 else: return -1 sort_on =(('self', test, 'desc')) return sequence.sort(seq, sort_on) " and i get the error: " Error Type: SyntaxError Error Value: sort option must contains no more than 2 fields " and Traceback: " Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Shared.DC.Scripts.Bindings, line 306, in __call__ Module Shared.DC.Scripts.Bindings, line 343, in _bindAndExec Module Products.PythonScripts.PythonScript, line 323, in _exec Module None, line 21, in orderBy - - Line 21 Module DocumentTemplate.sequence.SortEx, line 66, in sort Module DocumentTemplate.sequence.SortEx, line 161, in make_sortfunctions SyntaxError: sort option must contains no more than 2 fields " what i'm doing wrong? any suggestion? Thanks in advance.

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RE: [Zope] Does anyone care whether we deprecate ZClasses?
by Arenz, Ralph 25 Apr '05

25 Apr '05

SOS This would mean a disaster for us. We've created a lot products using ZClasses in production environment (internet,intranet,eai and so on) since zope-2.1.4. In short our complete developement in Zope is heavily based on ZClasses. We plan to use ZClasses in the future, too. For us ZClasses are a essential part of zope and they works very well. It is quite impossible for us to migrate all our Products to python-products or somethong else and i guess that this is not wanted by you!? I think that going away from ZClasses will let many other people with legacy-software running in the same problems. regards ralph

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How can I do audio/video streaming between users?
by Birol BI�AKLI 25 Apr '05

25 Apr '05

I want to do communication between users who want to do voice and video conferencing. Is there any program that can do this?

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