Zope-Announce May 2003

zope-announce@zope.dev

20 participants
31 discussions

ZODB 3.2 beta 1 released
by Jeremy Hylton 30 May '03

30 May '03

I'm pleased to announce the release of ZODB 3.2 beta 1. We have completed all the new features planned for ZODB 3.2 and have wrung out a number of bugs. I expect this release is still a bit rough, so I expect to do another beta release. ZODB 3.2 has a number of new features and improvements over ZODB 3.1: - improve performance and stability of ZEO - new ZEO authentication protocol - new configuration language, ZConfig, for databases, storages, and ZEO servers - many bug fixes This release of ZODB has been tested with Python 2.1.3, 2.2.3, and 2.3b1. It should also be compatible with Zope 2.6; Zope users should be able to install the new ZODB code on top of an existing Zope 2.6 installation. You can download the source release and Windows installers for 2.1 and 2.2 from http://www.zope.org/Products/ZODB3.2. I've included the most recent entries from NEWS.txt below. Jeremy What's new in ZODB3 3.2 beta 1 ============================== Release date: 30-May-2003 ZODB ---- Invalidations are now processed atomically. Each transaction will see all the changes caused by an earlier transaction or none of them. Before this patch, it was possible for a transaction to see invalid data because it saw only a subset of the invalidations. This is the most likely cause of reported BTrees corruption, where keys were stored in the wrong bucket. When a BTree bucket splits, the bucket and the bucket's parent are both modified. If a transaction sees the invalidation for the bucket but not the parent, the BTree in memory will be internally inconsistent and keys can be put in the wrong bucket. The atomic invalidation fix prevents this problem. A number of minor reference count fixes in the object cache were fixed. That's the cPickleCache.c file. It was possible for a transaction that failed in tpc_finish() to lose the traceback that caused the failure. The transaction code was fixed to report the original error as well as any errors that occur while trying to recover from the original error. The "other" argument to copyTransactionsFrom() only needs to have an .iterator() method. For convenience, change FileStorage's and BDBFullStorage's iterator to have this method, which just returns self. Mount points are now visible from mounted objects. Fixed memory leak involving database connections and caches. When a connection or database was closed, the cache and database leaked, because of a circular reference involving the cache. Fixed the cache to explicitly clear out its contents when its connection is closed. The ZODB cache has fewer methods. It used to expose methods that could mutate the dictionary, which allowed users to violate internal invariants. ZConfig ------- It is now possible to configure ZODB databases and storages and ZEO servers using ZConfig. ZEO & zdaemon ------------- ZEO now supports authenticated client connections. The default authentication protocol uses a hash-based challenge-response protocol to prove identity and establish a session key for message authentication. The architecture is pluggable to allow third-parties to developer better authentication protocols. There is a new HOWTO for running a ZEO server. The draft in this release is incomplete, but provides more guidance than previous releases. See the file Doc/ZEO/howto.txt. The ZEO storage server's transaction timeout feature was refactored and made slightly more rebust. A new ZEO utility script, ZEO/mkzeoinst.py, was added. This creates a standard directory structure and writes a configuration file with mostly default values, and a bootstrap script that can be used to manage and monitor the server using zdctl.py (see below). Much work was done to improve zdaemon's zdctl.py and zdrun.py scripts. (In the alpha 1 release, zdrun.py was called zdaemon.py, but installing it in <prefix>/bin caused much breakage due to the name conflict with the zdaemon package.) Together with the new mkzeoinst.py script, this makes controlling a ZEO server a breeze. A ZEO client will not read from its cache during cache verification. This fix was necessary to prevent the client from reading inconsistent data. The isReadOnly() method of a ZEO client was fixed to return the false when the client is connected to a read-only fallback server. The sync() method of ClientStorage and the pending() method of a zrpc connection now do both input and output. The short_repr() function used to generate log messages was fixed so that it does not blow up creating a repr of very long tuples. Storages -------- FileStorage has a new pack() implementation that fixes several reported problems that could lead to data loss. Two small bugs were fixed in DemoStorage. undoLog() did not handle its arguments correctly and pack() could accidentally delete objects created in versions. Fixed trivial bug in fsrecover that prevented it from working at all. FileStorage will use fsync() on Windows starting with Python 2.2.3. FileStorage's commit version was fixed. It used to stop after the first object, leaving all the other objects in the version. BTrees ------ Trying to store an object of a non-integer type into an IIBTree or OIBTree could leave the bucket in a variety of insane states. For example, trying b[obj] = "I'm a string, not an integer" where b is an OIBTree. This manifested as a refcount leak in the test suite, but could have been much worse (most likely in real life is that a seemingly arbitrary existing key would "go missing"). When deleting the first child of a BTree node with more than one child, a reference to the second child leaked. This could cause the entire bucket chain to leak (not be collected as garbage despite not being referenced anymore). Other minor BTree leak scenarios were also fixed. Tools ----- New tool zeoqueue.py for parsing ZEO log files, looking for blocked transactions. New tool repozo.py (originally by Anthony Baxter) for performing incremental backups of Data.fs files. The fsrecover.py script now does a better job of recovering from errors the occur in the middle of a transaction record. Fixed several bugs that caused partial or total failures in earlier versions.

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First EuroPython2003 Interview
by Tom Deprez 30 May '03

30 May '03

Hi! As last year we plan to close the gap until EuroPython2003 with interviews. Moshe Zadka is the first of this year to give an interview. Interested? Have look at: http://www.europython.org/other/interviews/entries/moshe_zadka Regards, EuroPython.

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Zope 2.6.2 Beta 2 Released
by Matthew T. Kromer 30 May '03

30 May '03

ZOPE 2.6.2 Beta 2 Released Zope 2.6.2b2 represents a development step in the next Zope release formed with a large number of community contributions. You may download Zope 2.6.2b2 from Zope.org: http://www.zope.org/Products/Zope/2.6.2b2/ Users of the Zope source release should note that Python 2.1.3 is now the required platform. Python 2.1.3 includes a fix to an issue that could cause crashes in Zope. Users who upgrade from source MUST RUN a make clean and make command to build the proper binaries correctly; distutils will skip compilation of the library modules needed for Zope and will cause errors if they are not up to date. Particular features of interest in Zope 2.6.2b2: * Reductions in Conflict Errors with Sessions * Fixed memory leak with Page Templates * Python 2.2 compatibility fixes * Back ports of BTrees fixes * Back ports of ZODB fixes relating to the packing of storage, where a packed database could contain an UNDO transaction which referred to data which had been discarded by the pack * A fix for fsrecover.py which prevented it from recovering any data * Fixes for collector issues 256, 683, 814, 816, 875, 892 For more information on what is new in this release, see the CHANGES.txt and HISTORY.txt files for the release: * http://www.zope.org/Products/Zope/2.6.2b2/CHANGES.txt * http://www.zope.org/Products/Zope/2.6.2b2/HISTORY.txt For more information on the available Zope releases, guidance for selecting the right distribution and installation instructions, please see: http://www.zope.org/Documentation/Misc/InstallingZope.html -- Matt Kromer Zope Corporation http://www.zope.com/

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Zope 3 Development Sprint in Australia
by Jan Smith 29 May '03

29 May '03

There is going to be a Zope 3 Development Sprint in Melbourne DATE: Wednesday 9th July - Sunday 13th July SPRINT TOPIC/S still to be decided VENUE: Trinity College, Melbourne University (1 kilometre from city centre) http://www.trinity.unimelb.edu.au/ Facilities: a state-of-the-art Multi-media Room, a second sprinting room and a tiered Lecture Theatre ACCOMODATION: Student bedrooms at Trinity College available for $A47 a night including breakfast MEALS: Available at Trinity in the students dining hall. Lunch and Evening Meals cost approx. $7-$11 COFFEE: Espresso making machine near the sprinting room Further details - OzZope Sprint Wiki - http://www.ozzope.org./OzSprintWiki Experienced Zope/Python developers welcome - its a good chance to see Australia. regards Jan Coordinator OzZope www.ozzope.org

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Epoz 0.2.2 released - WYSIWYG for Zope & Plone
by Maik Jablonski 28 May '03

28 May '03

Hi to all, I'm glad to announce the release of Epoz 0.2.2 - the first cross-browser-WYSIWYG-Editor for Zope & Plone. Much feedback from Epoz-Users all around the world went into this release, so don't wait to install or update Epoz. - Do you want a wysiwyg-editor for Zope, which works with Mozilla and Internet Explorer? => Have a look at "Epoz":http://www.zope.org/Members/mjablonski/Epoz. - Epoz uses rich-text-controls which requires IE (>= 5.5) or Mozilla (>=1.3.1). - Epoz can easily integrated in your site and can be customized with a toolbox. - Do you want to play with Epoz? Please visit the "Epoz-Test-Suite on freezope.org":http://mjablonski.freezope.org/epoz/test.html/edit. Changes - added buttons for sub- and superscript to Epoz. - added a widget-parameter, so you can specify your own-js-widget for Epoz; take epoz_script_widget.js as starting-point. - made widget-rendering faster by removing expensive document.writeln for each row; added a break after tag-selection-box, so Epoz won't need so much horizontal space. Keep zoped, Cheers, Maik Jablonski -- German Zope User Group http://www.dzug.org/

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EuroPython2003
by Tom Deprez 27 May '03

27 May '03

Early-Bird less than 1 week (31 May!) Tuesday, 27 May 2003. EuroPython 2003 at your service! We have a tremendous selection of over seventy (!) talks available for you in the three days at EuroPython: http://www.europython.org/sessions/talks This includes a wide selection of Zope talks across all three days as well -- so if you are interested in Zope, don't miss the largest Zope event ever. Here is more information about the schedule: http://www.europython.org/sessions/timeschedule To make sure you are part of this exciting event, register today! The early bird rate of 200 Euros is available until May 31st -- less than one week from today. You can review the rates and register here: http://www.europython.org/information/registration

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OOPServer 0.2 Released
by Thomas Guettler 25 May '03

25 May '03

This is the 0.2 release of OOPServer. It is a 100% Python solution for developing customised document management systems. It uses Zope as web application server. It includes an Upload-Client for integrating office or other software installed at the client. Up to now the target group are developers. Changes: OOPEmail is an email archive with full-text search, search for email adresses and display of *discussion threads* You can get the source from: http://guettli.sourceforge.net A demo is available: http://guettli.dyndns.org:8080 Thank you very much, to all who provided feedback to the last release! Thomas Guettler -- Thomas Guettler <guettli(a)thomas-guettler.de> http://www.thomas-guettler.de

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Silva 0.9.2 alpha version released
by Jan-Wijbrand Kolman 23 May '03

23 May '03

Hello, Infrae is happy to have released the alpha version of the upcoming Silva 0.9.2. This is an alpha, so it is not feature complete yet and most probably contains bugs. However, it provides a preview of new functionality: * Thoroughly revised user interface. * Completely new, flexible metadata architecture. * All text - including metadata - is stored as unicode. * Everything is now indexed using the Zope catalog. * Increased performance, both for public views and for the Silva edit screens. It is strongly advised *not* to use this version for production sites! Due to changes in the content structure this version will not work with existing Silva content. The beta version and final release version will include a content upgrade script. We do encourage testing this alpha. Please report any bugs and other issues to Infrae and discuss this version on the Silva mailinglists: silva-general(a)lists.sourceforge.net silva-dev(a)lists.infrae.com The alpha version can be downloaded at: http://www.zope.org/Members/faassen/Silva/Silva-0.9.2a.tgz This tarball contains the required Product versions of Silva, Formulator, ProxyIndex, PortalAnnotations and SilvaMetadata. regards, jw -- Jan-Wijbrand Kolman jw(a)infrae.com

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FYI: Epoz 0.2 - A cross-browser-wysiwyg-editor for Plone / Zope
by Maik Jablonski 21 May '03

21 May '03

Hi, I'm happy to announce the release of Epoz 0.2... call it the Epoz-into-Plone-integration-release. What is Epoz? Epoz is a cross-browser-wysiwyg-editor for Zope / Plone. It supports Mozilla (>1.3) and Internet-Explorer (>5.5). Where can I see a demo? http://mjablonski.freezope.org/epoz/test.html/edit Please note: the demo is running on a shared server, so there's no product-filesystem-access or Plone available. But it should give you the main idea running Epoz in a native Zope-Application...:) Where can I download Epoz? http://www.zope.org/Members/mjablonski/Epoz Question: I've installed Epoz, but nothing in my Plone changed...? After installing Epoz and restarting your server, create an External Method in your Plone-Root and enter: Install Install Epoz.Install install Click test to run the plone-epoz-installer. Then enter your Plone-Site, go to your preferences and select "Epoz" as Content-Editor... Now you should be able to edit your Plone-Documents comfortably with a wysiwyg-editor, regardless if you use Mozilla or IE. I'll hope, you'll find Epoz useful. Feel free to send me a comment, patch or anything else... The work on Epoz will continue... Cheers, Maik Jablonski -- German Zope User Group http://www.dzug.org/

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MyMediaManager 1.2rc1 released
by Gitte Wange 21 May '03

21 May '03

We are moving closer to the next, stable version of My Media Manager !!! Since we changed to the plugin structure, there have been only minor API changes. But the GUI has changed a lot, and we are getting closer and closer to a very userfriendly GUI. Now you will find the Edit Suite a lot easier to use, because we have gathered the most central information in there - easy to access. Using more than one media server is also easy to setup now - with different encoder start times. We schedule the final version to be released within a few weeks! Find the release candidate at http://www.zope.org/Members/gittew/MyMediaManager/ -- Gitte Wange Technical Manager Email: gitte(a)mmmanager.org Web: http://www.mmmanager.org Tlf: +45 36 46 20 02 Can inadvertantly make people's heads explode when attempting to explain how something works, rendering them unable to think very well for a while. -- Martijn Faassen on Jim Fulton, March 7 2001

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Zope-Announce May 2003