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CFP: Lightweight Languages 2002 (LL2)
by Jeremy Hylton 20 Sep '02

20 Sep '02

Lightweight Languages Worshop 2002 (LL2) ---------------------------------- Saturday, November 9, 2002, MIT, Cambridge, MA http://ll2.ai.mit.edu mailto:ll2@ai.mit.edu CALL FOR PRESENTATIONS LL2 will be an intense, exciting, one-day forum bringing together the best programming language implementors and researchers, from both academia and industry, to exchange ideas and information, to challenge one another, and to learn from one another. The focus of the workshop is not whether or not a particular language is "lightweight", but how to get usable and useful programming tools into the hands of programmers, minimizing dogma, and maximizing flexibility. Proposal Abstracts - due Tuesday Oct. 8: ------------------ We are seeking two to five page abstracts of talks to be given at the workshop. There will be two talk lengths: (1) Rapid Fire: 10 minutes strict time limit. (2) Regular: 30 minutes. Some suggested topics are: * Success or failure stories: History and analysis of: - language design: features that either worked out great or were a curse, - language implementation: clever implementation ideas that either worked or failed miserably, - application war stories involving lightweight languages. * "From scripts to programs" - software engineering with lightweight and/or a mix of languages. How to (or not to!) scale from little scripts to large, complex applications. * From ivory tower to cube - what language implementors need to know from academic programming languages research. * and back. Indicate whether you intend the talk to be a 10 minute or a 30 minute talk. Send submissions to: ll2-submit(a)ai.mit.edu We want presentations that will inspire, motivate, and educate. We want language implementors and researchers to leave the workshop fired up with ideas for future languages, features, and implementation tricks. We want language users to leave the workshop fired up with new ideas and new tools. In addition to submitted presentations, there will be a number of invited talks, and a panel or debate. After the workshop, there will be an evening social event and dinner. Last year's workshop is online at http://ll1.mit.edu. Dates: Tuesday, Oct. 8 - submissions due by end of day. Tuesday, Oct. 15 - notification of acceptance Saturday, Nov. 9, 9am-7pm - LL2! Program Committee: Paul Graham <pg(a)bugbear.com> Jeremy Hylton <jeremy(a)zope.com> Shriram Krishnamurthi <sk(a)cs.brown.edu> Mike Salib <msalib(a)mit.edu> Olin Shivers <shivers(a)cc.gatech.edu> Dan Sugalski <dan(a)sidhe.org> Greg Sullivan <gregs(a)ai.mit.edu> (chair) Dan Weinreb <DLWeinreb(a)attbi.com>

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ANNOUNCE: Pound - reverse proxy and load balancer - v0.11
by Robert Segall 18 Sep '02

18 Sep '02

This is to announce the release of Pound v0.11. New in this release: - added the ability to track sessions by cookie value or URL parameter value, in addition to IP address. - sockets are opened with REUSE_ADDR to allow for quick restart (the socket is first checked to make sure no other program is really using them). - added code for early pruning of sessions to "dead" back-end servers. - fixed a minor problem with content-less responses. The software is at version 0.11 (pre-production quality). Further testing (especially under heavy loads), improvements and suggestions are welcome. This will probably be the last pre-1.0 release, which will only include bug fixes (not that there are any). The feature set seems to be pretty much frozen - unless someone comes up with a really good, must-have, idea. What is Pound (from the Web page) - a reverse-proxy: it passes requests from client browsers to one or more back-end servers. - a load balancer: it will distribute the requests from the client browsers among several back-end servers, while keeping session information. - an SSL wrapper: Pound will decrypt HTTPS requests from client browsers and pass them as plain HTTP to the back-end browsers. - an HTTP/HTTPS sanitizer: Pound will verify requests for correctness and accept only well-formed ones. - an HTTP/1.1 to 1.0 proxy. - a fail-over-server: should a back-end server fail, Pound will take note of the fact and stop passing requests to it until it recovers. - a request redirector - it will pass client requests to separate groups of servers, based on required URL and the presence or absence of headers (pattern matching) Pound was specifically developed to serve as a front-end for multiple instances of Zope running on top of a common ZEO storage, but can be used with any other web server. A patch for the Python source of z2.py is available as part of the distribution to allow using Pound's SSL capabilities. Pound is currently in use in several medium to large volume sites and seems to be holding up quite well. The speed is well superior to other, equivalent solutions, the configuration is much simpler and the necessary resources (CPU, RAM, disk) are much, much lower. For further information, download, etc. please see http://www.apsis.ch/pound Pound is distributed under the GPL. Enjoy and let me know how it works for you. -- Robert Segall Apsis GmbH Postfach, Uetikon am See, CH-8707 Tel: +41-1-920 4904

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CMF/Plone training in Europe !
by Olivier DECKMYN - IngeniWeb 16 Sep '02

16 Sep '02

Hello all ! Ingeniweb, leading french company for Zope hosting and engineering is proud to announce the availability of its latest training concerning the famous CMF/PLONE: http://www.ZopeServiceProvider.com/Formation/FormationaCMF (Website in French only for now) This training can be done in French or English, in your company or in our training room, during 4 days in Europe, at your convenience. Contact us: - www.ingeniweb.com - contact(a)ingeniweb.com - +33 1 30 06 01 41 -- Olivier DECKMYN INGENIWEB (TM) - SARL 50000 Euros - RC B 438 725 632 2 cours du 14 Juillet - 78300 Poissy France - +331 300 601 41 web : www.ingeniweb.com - « les Services Web Ingénieux » PGP : http://www.ingeniweb.com/keys/olivier.deckmyn

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Plone Beta Announcement
by alan runyan 15 Sep '02

15 Sep '02

Plone reaches Beta stage September 12, 2002 the Plone project reached beta and is now in feature freeze. We are welcoming all developers and end users to come and try out the new system that we have been working on developing over the past 16 months. It is based on the Python language, the Zope application server, and the Content Management Framework product suite. We have given quite a bit of attention to this release and feel that it is ready for anyone who is interested in dynamic websites. What is Plone? Plone is a software product that is focused on the end user experience for managing dynamic websites - <buzzword>Content Management System </buzzword>. Plone does the work you hate doing. It helps avoid: a.. What developers hate - we have spent considerable amounts of time on user experience combined with general look and feel. The CSS has been well thought out and in use for over a year. We have taken great pains into soliciting feedback from end users to try to create the lowest impedance possible when interacting with a content management system. As a developer, Plone makes it easy to have a consistent and good-looking interface. b.. What consultants hate - most consultants tends to be "customizers" of software. They simply do not have the time to delve deep into the language or shuffle data back and forth between the application and storage medium. Once they learn the system they merely can create new content types by a click of a button and create workflow definitions through the web! c.. What designers hate - we hide all of the technical plumbing and go out of our way to make our XHTML extensible and easy to understand. All of our PageTemplates are easily changed in Dreamweaver and other WYSIWYG tools so that you do not have to be a technical person to change the design of a website. Since all of the style is housed in the CSS the designer can override our CSS or provide alternate styles to compliment the stock Plone stylesheets. d.. What bosses hate - software that is a pain to install and evaluate. Our Windows installer, made by Andy McKay of zopezen.org fame has written enables a "pointy clicky" experience from install to managing the Plone system. Plone "Just Works". They can use and test the system how they see fit, no geek explanations needed. The software is like any other software Product, Interwoven's Teamsite or Vignettes StoryServer - it requires some up front understanding of the technologies involved. We are trying to lower the bar as much as possible: Python is the simplest language, Zope complexities are hidden by the CMF/Plone Products, and third party products like Ben Saller's CMFTypes - promise a future of creating Plone content without having to touch HTML! You can find the plone website at http://plone.org/ cheers, ~runyaga, limi, plonista, tesdal and the rest of The Plone Team

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[ANN] TextIndexNG 1.05 Beta 1 released
by Andreas Jung 14 Sep '02

14 Sep '02

After a longer period of time, I am pleased to announce the release of TextIndexNG 1.05 beta1 TextIndexNG is a pluggable index for the ZCatalog that enhances the fulltext indexing capabilities of Zope by providing the following features: * support for document converters (HTML, PDF, WinWord, PowerPoint, Postscript). Custom converters can be easily added * stemmer support for 12 languages * optional support for right truncation * similarity search (soundex, metaphone support) (for english) * NEAR search * phrase search * pluggable query parsers (two parsers included) * stop words support * new test tab for interactive testing * faster than Zopes old TextIndex * full unicode support (new) * normalization support (new) * new similarity algorithm: double metaphone (new) * new TXNGSplitter * new vocabulary browser Changes: * added full wildcard support for CLLexicon and StandardLexicon * rewrote Stemmer module (now fully unicode compliant) * unittests code cleanup * query evaluation refactored * Parser API changed to return a parse tree instead of a Python expression * new parse tree evaluator added * PyQueryParser: now accepts a minus sign as prefix of a word to indicate NOT. Searching for "foo -bar" will be recognized as "foo AND NOT bar". In addition the syntax for "ANDNOT" has been changed to "AND NOT". * stopword handling through registry * added double metaphone algorithm for similarity search * Splitter handling changed: The new TXNGSplitter has been added. It supports both strings and unicode strings and supercedes the functionalities of all other existing splitters for Zope. TXNGSplitter is the only splitter that will be used by TextIndexNG. The "index numbers" options has been removed both from the splitter and the ZMI. In addition the splitter now accepts an optional set of characters that are recognized to be valid inside words. This allows you to index common words like "C++" or "python-22.lib" when you specify "+.-" as valid word characters. * Python C extensions compile now under Windows (Binary distribution will be available for Windows) * normalizer support added * full unicode support * the add form for TextIndexNG now uses the registries to obtain informations about registered componenents instead of hardcoded values. * fixed problem with changed API of the Interface packages (backport from Zope 3 to Zope 2.6) * added vocabulary browser * lots of code cleanup * bug fixes... * add statistics tab to ZMI * fixed serious bug in TXNGSplitter due to missing encoding parameter * minor ZMI adjustments * using converters no longer raises an exception when a converter could not be found for the mime-type of a document Requirements: * Zope 2.5 or Zope CVS trunk checkout Documentation: * http://www.zope.org/Members/ajung/TextIndexNG/wiki Download: * http://www.zope.org/Members/ajung/TextIndexNG/ or * http://sourceforge.net/project/showfiles.php?group_id=50052 --------------------------------------------------------------------- - Andreas Jung http://www.andreas-jung.com - - EMail: andreas at andreas-jung.com - - "Life is too short to (re)write parsers" - ---------------------------------------------------------------------

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ZODB 3.1b1 released
by Jeremy Hylton 12 Sep '02

12 Sep '02

I am pleased to announce the first beta release of ZODB3, formerly known as StandaloneZODB. ZODB is an object database for Python that provides transactional persistence while requiring few, if any, changes to application logic. You can get a source release from http://www.zope.org/Products/StandaloneZODB Windows users will need a compiler to build C extensions. I'd be happy to accept a binary installer for Windows, if a user is willing to contribute it. The components you get with the ZODB3 release are as follows: - Core ZODB, including the persistence machinery - Standard storages such as FileStorage - Supporting modules such as ExtensionClass - The persistent BTrees modules - ZEO - Experimental Berkeley storages - Some documentation <wink> The beta release contains roughly the same version of ZODB that will be included in Zope 2.6. The two releases are not directly coordinated, so there may be some subtle differences. Many people have contributed to ZODB3. Special thanks to Toby Dickenson for the new ZODB Connection cache. Many people at Zope Corp. have contributed code and tested unreleased versions. The NEWS.txt file contains a list of the major changes since the StandaloneZODB 1.0 release in February. You can also find this list at http://www.zope.org/Products/StandaloneZODB/NEWS Jeremy

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Persistent Translation Service 0.1: i18n your ZPTs now!
by Florent Guillaume 11 Sep '02

11 Sep '02

Announcing PersistentTranslationService 0.1: This first alpha release of PersistentTranslationService allows you to have fully functional internationalization from Page Templates using the standardized i18n tags. PersistentTranslationService is configurable and can redirect different i18n domains to different message catalogs. PersistentTranslationService currently uses Localizer as its message catalog backend, and Zope 2.7's implementation of i18n tags. It needs a Unicode-aware Zope (Zope-2_6-branch from CVS is recommended). See http://www.zope.org/Members/efge/PersistentTranslationService for more information. Florent -- Florent Guillaume, Nuxeo (Paris, France) +33 1 40 33 79 87 http://nuxeo.com mailto:fg@nuxeo.com

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ZEO cache analysis tools prerelease
by Guido van Rossum 10 Sep '02

10 Sep '02

* Do you want to know if your ZEO client cache is configured properly? * Are you using ZEO but you didn't know it had a client cache? * Do you want to contribute towards a better ZEO client cache design? If you answered yes at least once, read on! Jeremy is working on a new ZEO 2 release; the first beta was released two weeks ago. For that release I have written cache instrumentation code that lets you review the effectiveness of the ZEO client cache. There's also a version of the instrumented cache for ZEO 1. I don't plan to work on it more before the ZEO 2 release (unless I receive bug reports). All code is available *now* from the ZODB3 CVS tree: http://cvs.zope.org/ZODB3/. In addition to adding instrumentation, some bugs affecting performance but not correctness of the cache have been fixed in the instrumented cache code. The instrumentation is controlled by an environment variable so you can leave the new cache code in place after turning off the instrumentation. I'm inviting everyone who is running ZEO seriously to install the cache instrumentation code, run it for a while, and send me the resulting trace file. (The trace files contain no privacy-sensitive data, so you don't have to worry about revealing anything about your site.) The trace files will be used as input to a simulation of a new cache design. The only way to validate a cache design is to run experiments, and trace files are the most reliable way to run such experiments. The more trace files I receive the better. The larger they are the better (traces of several days of uninterrupted service are ideal). I've got the disk space to burn. I should mention that I'm confident that the instrumentated cache works correctly: we've been collecting traces without problems at a Zope Corp customer site since last Wednesday. To enable the cache instrumentation, you need to replace a single file in the ZEO package used by the Zope application, set an environment variable, and restart the Zope application. The file you need to replace is named ClientCache.py. Here are the URLs: For ZEO 1: http://cvs.zope.org/ZODB3/ZEO1/ClientCache.py?rev=HEAD For ZEO 2: http://cvs.zope.org/ZODB3/ZEO/ClientCache.py?rev=HEAD Make sure to get the file for the ZEO version you are using! Details about enabling the tracing can be found here: http://cvs.zope.org/ZODB3/ZEO/README.txt?rev=HEAD If you want to play with the statistics or simulation programs yourself, get stats.py and simul.py from the ZEO directory: http://cvs.zope.org/ZODB3/ZEO/ These work with trace files produced by either version of the instrumented cache code. Once you have one or more trace files for me, the best way to get it to me is probably to place a gzipped copy on an FTP or HTTP server from which I can download it and mail me the URL. As I said, these trace files contain no sensitive data. If you still prefer a different approach, email me and we'll figure something out. --Guido van Rossum (home page: http://www.python.org/~guido/)

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IngeniWeb release MonZope !!!
by Olivier DECKMYN - IngeniWeb 09 Sep '02

09 Sep '02

Hi all ! IngeniWeb, french leader of Zope hosting and consulting, is proud to announce the release of version 1.0 of its MonZope bundle. MonZope is a win32 bundle for the end-user, including Zope 2.5.1, IngeniSite P.E. (End-User oriented CMS System) and MonZope.com a free redirection system. With this toolset, you can host a Zope personal website on your own ADSL/Cable internet line. Full documentation is provided. Everything is Free. French version only for now. Visit and download package on www.monzope.com Cheers, -- Olivier DECKMYN INGENIWEB (TM) - SARL 50000 Euros - RC B 438 725 632 2 cours du 14 Juillet - 78300 Poissy France - +331 300 601 41 web : www.ingeniweb.com - « les Services Web Ingénieux » PGP : http://www.ingeniweb.com/keys/olivier.deckmyn

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ANNOUNCE: Pound - reverse proxy and load balancer - v0.10
by Robert Segall 05 Sep '02

05 Sep '02

This is to announce the release of Pound v0.10. New in this release: - added required/disallowed headers matching in groups - configurable cyphers/strength for SSL - retry request on discovering dead back-end - configurable logging facility - added configure script - fixed bug in multiple requests per connection (GROUP matching) - (re)fixed missing '~' in URL matching - fixed bug in reading certificate/private-key file What is Pound (from the Web page) - a reverse-proxy: it passes requests from client browsers to one or more back-end servers. - a load balancer: it will distribute the requests from the client browsers among several back-end servers, while keeping session information. - an SSL wrapper: Pound will decrypt HTTPS requests from client browsers and pass them as plain HTTP to the back-end browsers. - an HTTP/HTTPS sanitizer: Pound will verify requests for correctness and accept only well-formed ones. - an HTTP/1.1 to 1.0 proxy. - a fail-over-server: should a back-end server fail, Pound will take note of the fact and stop passing requests to it until it recovers. - a request redirector - it will pass client requests to separate groups of servers, based on required URL and the presence or absence of headers (pattern matching) Pound was specifically developed to serve as a front-end for multiple instances of Zope running on top of a common ZEO storage, but can be used with any other web server. A patch for the Python source of z2.py is available as part of the distribution to allow using Pound's SSL capabilities. Pound is currently in use in several mdeium to large volume sites and seems to be holding up quite well. The speed is well superior to other, equivalent solutions, the configuration is much simpler and the necessary resources (CPU, RAM, disk) are much, much lower. For further information, download, etc. please see http://www.apsis.ch/pound The software is at version 0.10 (beta quality). Further testing (especially under heavy loads), improvements and suggestions are welcome. Pound is distributed under the GPL. Enjoy and let me know how it works for you. -- Robert Segall Apsis GmbH Postfach, Uetikon am See, CH-8707 Tel: +41-1-920 4904

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