May 2000 - Zope - Zope lists

Re: [Zope] Higher Education
by Rik Hoekstra 26 May '00

26 May '00

>Phil Langton wrote: >> >> Someone has mentioned that Digital Creations has taken on someone who >> is to implement a zope-based virtual learning environment tool kit. >> >> Is this so? >> Any mailing lists or contacts or test areas? > >You're probably referring to me. I haven't taken an active role in >this area recently because of the time it takes to get married >(January/February), change jobs (March/April), move across the country >(April), and get settled in a new area. :-) > >The zope-edu project was doing well for a while but we were unable to >define the scope of the project. There are a lot of facets involved >and everybody was approaching it with a very different perspective. >And nobody knew the technology well enough: it's too easy to >re-implement things in Zope that have already been done by others. A >battle ensued over naming conventions (ZSchool? ZopeEdu? Something >else?) and the mailing list eventually reached an activity level of >zero. Which IMHO was actually mainly due to the maillist server severely suffering from outage and millenium bugs, because before that I recall discussions were very much alive, and of a high quality. > >We could start again with a new approach: a Wiki! Wikis work very well >for initial designs. We could take the good posts from pi.slcc.edu and >put them into the Wiki right away. > >How many are still interested in this? > I was among one of the first to be active in the zope-edu list and I am still interested and even working on a product for course maintenance. I even sent Shane an immature snapshot, but had to reimplement the product because of nesting ZClasses (sigh). Moreover, I was changing jobs as well, which did not exactly help in getting things from the ground. So - yes I'm still interested Shane. Rik

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Roxen patch
by Magnus Heino (Rivermen) 26 May '00

26 May '00

Hi. I have lost the patch for Roxen 1.3 to work properly when you enable RXML-parsing for CGI, i.e. Zope. Who has it? /Magnus Heino

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SQLSession and Memory leak
by Hung Jung Lu 26 May '00

26 May '00

Hi, This is just for people's information on my own experience in Zope memory leak. It may not reflect your personal case. But if it does, please post a note to the mailing list. When there is a problem, people have to face it. I really dislike the attitude of people who just shrug their shoulders. I have seen this all too many times. Everytime I go through a problem and posted in to the mailing list, there are always people that try to say nonsense and refuse to accept that there is a problem. Guess what? Weeks later more and more people suffer similar problems. By now I am very sure that a huge memory leak is coming from SQLSession. Remember about one or two months ago I mentioned about memory leak in Zope? There were so many die-hard Zope mongers that the very first thing they feel is their pride being hurt, and instead of looking at possible sources of the problem, their attitude was: it can't be, you must be doing something wrong, Zope has no memory leak. Now, does that attitude help to find the source of the problem???! Perl mongers are bad enough, and now we have Zope mongers. The thing is, no one would complain about memory leak if there is no performance impact. When someone complains about memory leak, it's because the performance is getting to be unbearable. After using SQLSession with two different databases (Gadfly and Sybase), and after the problem persisted, and after using manage_debug in Control Panel, I have decided that enough is enough. I implemented my own RAM-based Session Management. And it's been about a month now. No more memory leak. Zope memory usage stayed nice and low. Performance improved substantially to the amazement of everyone. No more need to re-start Zope to bring the memory down. There are hundreds of people out there using SQLSession. I know for fact that someone using SQLSession has actually written a Unix cron job to restart Zope every night in order to keep the memory usage down. (Of course, the person does not know the memory leak is coming from SQLSession.) >From the manage_debug screen, it seems that the leak has something to do with the SQLSession inheriting from Implicit class. I don't remember much anymore (since I got rid of SQLSession already a while ago.) I just remember the keyword "Implicit" showing up in the objects in the manage_debug screen. All I know is that after I stop using SQLSession (mainly with Gadfly, which was a temporary solution anyway), my problems stopped. regards, Hung Jung ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

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Re: [Zope] Re: [Zope-Annce] ANN: Perl For Zope - why I'm bummed
by Karl Anderson 26 May '00

26 May '00

Ken Manheimer <klm(a)digicool.com> writes: > On 25 May 2000, Roman Milner wrote: > > > Well, my point is that I don't think you will be able to ignore it. > > Your boss will give you a product to maintain that includes someone > > else's perl code - sooner or later. My boss isn't going to suddenly tell me that I'm now either a perl developer or unemployed, because he hired me for my judgement & decision skills as well as my keyboard pounding skills. If your boss didn't hire you for that reason - well, its an excellent time to be a skilled IT worker looking for a job. & if your boss doesn't value your intelligence and also wants you to suddenly hack perl, then your boss didn't read your resume. & to reinforce what Ken says: > For all of you that love Python, and testify to either leaving perl > with great relief or not being willing to learn it in the first place > - why don't you trust your judgement? It's also an even more excellent time to be a sklled Zopista looking for a job. Find a good place looking to start a Zope project, build them a site, & you'll be deciding whether to use Perl products or not. I can understand the fear of dilluting a good clean python/C environment with evil dirty perl, but if I didn't think that a Zope environment will continue to be a good place to be, I'd already have a different email address. -- Karl Anderson karl(a)digicool.com

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Calling PythonMethods from PythonMethods.
by Steve Drees 26 May '00

26 May '00

How does one do this?

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Tutorial
by Daniel Fairs 26 May '00

26 May '00

Hi, I see Amos has a tutorial. Could this be added by default to each member's Zope area on Zope.org? Might me useful almost as a small 'demo' of Zope's features. Cheers, Dan Daniel Fairs danfairs(a)bits.bris.ac.uk, danfairs(a)hotmail.com http://www.darkalley.co.uk, http://listen.to/agentorange Just because you're not paranoid doesn't mean they're not out to get you.

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dtml-let help
by Pete Kazmier 26 May '00

26 May '00

I'm trying to keep a cumulative count while sequencing over a list via the dmtl-in tag. I tried this but it didn't work, Zope complained about the syntax. Could someone help me or point me in the right direction, I search the archives but couldn't find anything relevant? Thanks! <dtml-let totalActive="0" totalUnknown="0" totalPorts="0"> <dtml-in "objectValues(['Gateway'])"> <dtml-with sequence-item> <dtml-call "CallStatus()"> <dtml-var "totalActive=totalActive+active"> <dtml-var "totalUnknown=totalUnknown + unknown"> <dtml-var "totalPorts=totalPorts + ports"> </dtml-with> </dtml-in> <dtml-var totalActive> <dtml-var totalUnknown> <dtml-var totalPorts> </dtml-let> -- Peter Kazmier http://www.kazmier.com PGP Fingerprint 4FE7 8DA3 D0B5 9CAA 69DC 7243 1855 BC2E 4B43 5654

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Re: [Zope] Higher Education
by Ken Manheimer 26 May '00

26 May '00

On Fri, 26 May 2000, Timothy Wilson wrote: > On Fri, 26 May 2000, Rik Hoekstra wrote: > > > >How many are still interested in this? > > > > I was among one of the first to be active in the zope-edu list and I am > > still interested and even working on a product for course maintenance. I > > even sent Shane an immature snapshot, but had to reimplement the product > > because of nesting ZClasses (sigh). Moreover, I was changing jobs as well, > > which did not exactly help in getting things from the ground. > > > > So - yes I'm still interested Shane. > > I'm still very much interested in this. School's out in a week or so, and I > plan to work hard this summer worked on developing Zope stuff to be used > here at school. I would love to renew the discussions. You know, there's the python edu-sig (http://www.python.org/sigs/edu-sig) - i wonder whether there's some point in crossing over the efforts? On the plus side, there's a number of educators there with real interest in teaching programming in a good way, on the minus side, their charter is pretty much python oriented, and zope may be a more narrow context than they would wish to dwell within. I mean, i'm not sure how the slightly different agendas would work out... Ken Manheimer klm(a)digicool.com

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Re: Zope
by thomas＠hentschel.net 26 May '00

26 May '00

[forwarded to the list for archival] If you're running FreeBSD, try starting zserver by hand first before you connect. For some reason, FreeBSD can't seem to start it thru the pcgi wrapper. -Th On 25 May, James Cummings wrote: > I was looking in the mail list archives...and I saw the problem you posted > about getting the following error: > > > (116) unable to connect, fd=4 >  > > Did you ever determine what was causing this? I just installed Zope...and > I'm getting the same problem. > > Thanks, > James > >

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Zope 2.1.6 / ZWiki 0.6.1 AUTHENTICATED_USER has dual personality
by Geoff Gardiner 26 May '00

26 May '00

I have some problem with AUTHENTICATED_USER being two people when using DTML Methods - sometimes. I have now characterized the situation. So that I don't overload the list I've written details (for as long as they remain) at: http://www.joyful.com/zwiki/ZWikiProblems#authuser Zope 2.1.6, ZWiki 0.6.1. Geoff Gardiner

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