- Zope-Dev - Zope lists

Apache Mod_rewrite question
by Ganesha Shanmuganathan 17 Jul '04

17 Jul '04

Hi, I came across a strange behavior of mod_rewrite while using with zope. Although it is not a zope question, I was wondering if any of you have run into this. We are using mod_rewrite to redirect the users to one of the zope sites of a Zeo cluster. The directive RewriteMap has unexpected behavior when it is used to define more than one map with same map name in diffrent places. Normally all the directives within a tag applies only to that tag. For example: <VirtualHost *> ServerName www.foo.com DocumentRoot /var/www/foo RewriteEngine on RewriteLog /var/log/httpd/foo.log RewriteLogLevel 2 RewriteMap map rnd:/etc/httpd/conf/foomap.txt RewriteRule ^/Foo(.*) http://127.0.0.1${map:IP}/VirtualHostBase/http/foo/$1 [L,P] </VirtualHost> <VirtualHost *> ServerName www.bar.com DocumentRoot /var/www/bar RewriteEngine on RewriteLog /var/log/httpd/bar.log RewriteLogLevel 2 RewriteMap map rnd:/etc/httpd/conf/barmap.txt RewriteRule ^/Bar(.*) http://127.0.0.1${map:IP}/VirtualHostBase/http/bar/$1 [L,P] </VirtualHost> The above is expected to work. However ModRewrite, does not read the map file foomap.txt or barmap.txt everytime it needs it and it caches the results after the first time it reads for faster operation. The problem is the cache treats both the file as the same since they have the same name! Hence if you visit foo.com first, the data stored in foomap.txt is returned from the cache next time you visit foo.com or bar.com. This causes apache to redirect into the wrong zope site. Has anyone else experienced similar problems ? thanks, ganesh Zeomega LLC Open minds' Open Solutions Plano, Texas, USA Bangalore, India phone: 972-731-6750 http://www.zeomega.com

4 9

Re: [ZODB-Dev] Getting rid of ZODB versions (was Re: [ZWeb] Are Versions evil?)
by Dieter Maurer 16 Jul '04

16 Jul '04

Jim Fulton wrote at 2004-7-15 17:18 -0400: >Dieter Maurer wrote: >I don't think anyone find versions useful in cases where >locks matter. With versions, if you get resource contention, >someone loses. Yes, but hopefully the short running (inexpensive) and not the long running (expensive) process... >Long-running subtransactions as I'm proposing would rely on mult-version >concurrency control, rather than locks. MVCC is nice (we already use it) but its help for write contention is limited. The locks used by the current "Version"s are better suited for long running transactions. > In either case, if you have >resource contention, you are probably out of luck. Luck is not a binary concept ;-) Our current most essential use case for "Version"s is reindexing large catalogs. Reindexing can take hours. It is bad when the reindexing fails due to a write conflict. It is much more acceptable when an intervening occational catalog update fails with a "VersionLockError". -- Dieter

2 1

Re: [ZODB-Dev] Getting rid of ZODB versions (was Re: [ZWeb] Are Versions evil?)
by Christian Robottom Reis 16 Jul '04

16 Jul '04

On Thu, Jul 15, 2004 at 06:09:29PM -0400, Jim Fulton wrote: > >Locks are important, however, in cases such as generating unique IDs > >based on integer attributes in a database. > > I don't know what this is. Well, let's say I wanted to have a unique ID for payments (people want to refer to them for number) -- each payment instance created should have its own ID. > > This is something we never > >managed to sort out in IndexedCatalog, and I wonder if anyone else > >ever has. > > In the regular catalog, we pick ids and let normal time-stamp-based > concurrency control tell us when there is a conflict. Yes, but then you need to change IDs at commit time. If I want to start a transaction by showing the user a certain unique ID that was allocated, I run the risk of having to tell him "oh, sorry, we conflicted on that ID, I need to give you another one". > The database itself uses a short-lived lock to generate oids. Functionality which would be interesting if it were publically available to solve the aforementioned problem. Take care, -- Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 3361 2331

2 2

manage_afterAdd +webdav + two times called
by Kai Hoppert 16 Jul '04

16 Jul '04

Hi all, zope2.7.2-RC1 cmf 1.4.4 i tried and tested a bit around with webdav and noticed that manage_afterAdd is called two times in putting a file into Plone . Yea i know this is not the list for Plone but i think this is more a problem from zope, webdav and cmf. File "/var/lib/zope271/lib/python/webdav/NullResource.py", line 110, in PUT ob = factory(name, typ, body) ______________________________________________________________________________ File "/var/lib/zope271/lib/python/webdav/NullResource.py", line 127, in PUT self.__parent__._setObject(name, ob) These two lines from the traceback are the mainproblem i think. First manage manage_afterAdd will be called after creating the Object and second it is called after writing the object into zodb. Is this intended that manage_afterAdd is called two times?? Shouldn't it only called after writing the data to zodb. Below i posted the whole traceback wich was produced. Greetings Kai File "/var/lib/zope271/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__ response=response) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 389, in publish_module environ, debug, request, response) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 180, in publish_module_standard response = publish(request, module_name, after_list, debug=debug) File "/var/lib/zope271/instance/default/Products/PlacelessTranslationService/PatchStringIO.py", line 51, in new_publish x = Publish.old_publish(request, module_name, after_list, debug) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 101, in publish request, bind=1) File "/var/lib/zope271/lib/python/ZPublisher/mapply.py", line 88, in mapply if debug is not None: return debug(object,args,context) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 39, in call_object result=apply(object,args) # Type s<cr> to step into published object. File "/var/lib/zope271/lib/python/webdav/NullResource.py", line 110, in PUT ob = factory(name, typ, body) File "/var/lib/zope271/instance/default/Products/CMFCore/PortalFolder.py", line 336, in PUT_factory self.invokeFactory( typeObjectName, name ) File "/var/lib/zope271/instance/default/Products/CMFCore/PortalFolder.py", line 363, in invokeFactory , kw File "/var/lib/zope271/instance/default/Products/CMFCore/TypesTool.py", line 709, in constructContent ob = apply(info.constructInstance, (container, id) + args, kw) File "/var/lib/zope271/instance/default/Products/CMFCore/TypesTool.py", line 398, in constructInstance id = apply( m, args, kw ) or id # allow factory to munge ID File "<string>", line 4, in addVCard File "/var/lib/zope271/lib/python/OFS/ObjectManager.py", line 276, in _setObject object.manage_afterAdd(object, self) File "/var/lib/zope271/instance/default/Products/VCard/VCard.py", line 239, in manage_afterAdd print print_stack() None File "/var/lib/zope271/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__ response=response) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 389, in publish_module environ, debug, request, response) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 180, in publish_module_standard response = publish(request, module_name, after_list, debug=debug) File "/var/lib/zope271/instance/default/Products/PlacelessTranslationService/PatchStringIO.py", line 51, in new_publish x = Publish.old_publish(request, module_name, after_list, debug) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 101, in publish request, bind=1) File "/var/lib/zope271/lib/python/ZPublisher/mapply.py", line 88, in mapply if debug is not None: return debug(object,args,context) File "/var/lib/zope271/lib/python/ZPublisher/Publish.py", line 39, in call_object result=apply(object,args) # Type s<cr> to step into published object. File "/var/lib/zope271/lib/python/webdav/NullResource.py", line 127, in PUT self.__parent__._setObject(name, ob) File "/var/lib/zope271/lib/python/OFS/ObjectManager.py", line 276, in _setObject object.manage_afterAdd(object, self) File "/var/lib/zope271/instance/default/Products/VCard/VCard.py", line 239, in manage_afterAdd print print_stack() ___________________________________________________ tomcom Gesellschaft für Informationstechnologie mbH Heuriedweg 14 | D-88131 Lindau Fon +49 (0)8382 975844 | Fax +49 (0)8382 975855 kai.hoppert(a)tomcom.de | http://www.tomcom.de This document should only be read by those persons to whom it is addressed and is not intended to be relied upon by any person without subsequent written confirmation of its contents. tomcom disclaims all responsibility and accepts no liability for the consequences of any person acting, or refraining from acting on the contents of this document. Any unauthorised form of dissemination, copying, disclosure, modification, distribution and/or publication of this message is strictly prohibited. For information about tomcom please contact us on +49.8382.975844 or visit our web site at www.tomcom.de

3 2

How to add sections to zope.conf?
by Chris Withers 16 Jul '04

16 Jul '04

Hi all, Say I have a process which needs some configuration but which is based on zope. How do I add arbitary sections into zope.conf at the top level and then how do I get hold of the configuration? What I'd like to do (and tried!) is to write a component.xml, put it in my package and then add a section to the top-level of my zope.conf something like: %import mypackage <mypackage_config> somekey somevalue </mypackage_config> ...and then get hold of it with: from App.config import getConfiguration config = getConfiguration().mypackage_config ...but this doesn't seem to work. Am I doing something wrong or do their need to be changes to zopeschema.xml to allow this? cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

2 3

zope 2.7.1 on xp profesional
by Chris Johnson 16 Jul '04

16 Jul '04

I get this error on running runzope installed on xp profesional ibm thinkpad. Any idea what is happening ? cj C:\Zope-Instance\bin>runzope.bat>c:\zopeError.txt C:\Program Files\Zope-2.7.1\bin\lib\fcntl.py:7: DeprecationWarning: the FCNTL mo dule is deprecated; please use fcntl DeprecationWarning) ------ 2004-07-16T21:50:47 INFO(0) ZServer HTTP server started at Fri Jul 16 21:50:47 2 004 Hostname: IBM-CD24ABFA02F Port: 8080 ------ 2004-07-16T21:50:47 INFO(0) ZServer FTP server started at Fri Jul 16 21:50:47 20 04 Hostname: IBM-CD24ABFA02F Port: 8021 Traceback (most recent call last): File "C:\Program Files\Zope-2.7.1\lib\python\Zope\Startup\run.py", line 50, in ? run() File "C:\Program Files\Zope-2.7.1\lib\python\Zope\Startup\run.py", line 19, in run start_zope(opts.configroot) File "C:\Program Files\Zope-2.7.1\lib\python\Zope\Startup\__init__.py", line 4 9, in start_zope starter.makeLockFile() File "C:\Program Files\Zope-2.7.1\lib\python\Zope\Startup\__init__.py", line 2 51, in makeLockFile lock_file(self.lockfile) File "C:\Program Files\Zope-2.7.1\lib\python\Zope\Startup\misc\lock_file.py", line 40, in lock_file fcntl.flock(file, fcntl.LOCK_EX | fcntl.LOCK_NB) AttributeError: 'module' object has no attribute 'flock' C:\Zope-Instance\bin>

2 1

zope 2.7.1 on xp profesional
by Chris Johnson 16 Jul '04

16 Jul '04

<<zopeError.txt>> I get this error on running runzope installed on xp profesional ibm thinkpad. Any idea what is happening ? cj

1 0

Granularity of Persistent Objects
by Ian Beatty 16 Jul '04

16 Jul '04

Greetings. I'm developing a Zope (2.7) product, and I've got a particular persistent object that's going to be a real bottleneck, in that there will be many threads trying to change the state of the object more or less simultaneously. I'd like to "spread out" the problem by taking member fields of the object (lists, dictionaries, etc.) and making them persistent sub-objects in their own right. That way, changes made to one of them can be saved to the ZODB without causing thread conflicts with changes being made to others, removing at least some of the thred conflicts. However, I don't know how to do this. Is it as simple as using a PersistentMapping where I'd normally use a standard Python dictionary? Or shall I wrap each one in a custom class that subclasses Persistent? Does my parent object have to handle these in any special way so that the ZODB knows to give them their own DB records? I've tried looking at how ObjectManager does things, and found it less than enlightening. Thanks, ..Ian Beatty University of Massachusetts Amherst

4 4

mount a plonesite with zeo storage
by Martino Salvato 16 Jul '04

16 Jul '04

hi, I'm just try to use Zope 2.7 and Plone with zeo storage support. and I would like to put a CMFPlone site into a zeo client storage to mount in a zope instance. I have added in my zeo.conf <filestorage plonesite> path $INSTANCE/var/plonesite.fs </filestorage> and in zope.conf <zodb_db plonesite> mount-point /plonesite container-class Products.CMFPlone.Portal.PlonSite <zeoclient> server localhost:9999 storage plonesite name plonesite cache-size 200000000 client cache var $INSTANCE/var </zeoclient> </zodb_db> I start the zeo with runzeo and the zeo client storage plonesite.fs is created... I start zope, but when i try to add a ZODB Mount Point, I get a Zope Folder instead of a Plone Site, why the container-class rule doesn't work? Or there is another way to add a new plonesite as zeo client storage? Thanks, in advance... Martino

1 0

Re: [ZODB-Dev] Getting rid of ZODB versions (was Re: [ZWeb] Are Versions evil?)
by Christian Robottom Reis 15 Jul '04

15 Jul '04

On Thu, Jul 15, 2004 at 05:18:37PM -0400, Jim Fulton wrote: > I don't think anyone find versions useful in cases where > locks matter. With versions, if you get resource contention, > someone loses. > > Long-running subtransactions as I'm proposing would rely on mult-version > concurrency control, rather than locks. In either case, if you have > resource contention, you are probably out of luck. Locks are important, however, in cases such as generating unique IDs based on integer attribtues in a database. This is something we never managed to sort out in IndexedCatalog, and I wonder if anyone else ever has. Take care, -- Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 3361 2331

1 0