February 2004 - Zope-Dev

Options problems with 2.7 and Zope.configure("/instance/etc/zope.conf")
by Erik A.Dahl 14 Feb '04

14 Feb '04

I'm moving a bunch of scripts that do the import Zope, app=Zope.app() dance to 2.7. I added the configure call and things were find until I ran a script that had positional arguments. This gave me a "ERROR: positional arguments are not supported". This comes from zdoptions.py:226. Basically zdoptions.py is parsing sys.argv. I don't think it needs to do this from the Zope.configure call since it is getting the config from zope.conf. We could prevent the sys.argv parse by passing changing lib/python/Zope/Startup/run.py:39 to: opts.realize(args=[], doc="Sorry, no option docs yet.", raise_getopt_errs=0) It looks like all that zdoptions.py is looking for in sys.argv is its configfile. Since we passed this in to Zope.configure it doesn't seem nessesary. Would this mess other stuff up? I don't want zope parsing my script options! -EAD

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2.7.0 corrupt Data.fs
by Thomas Anderson 14 Feb '04

14 Feb '04

I'm seeing changes to the ZODB getting lost on reboot. I think it's because there are no fsync() calls being issued by Zope or even by zopectl on stopping Zope but I can't be sure. I'm using /instance/bin/zopectl {start|stop} for controlling Zope. I added a "sync" command to my /etc/init.d/umountfs script (Debian Woody) and this seems to have fixed the problem. I know postgresql syncs to disk for every transaction by default, does Zope? Tom

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TypeErrors during 'make test'
by Evan Simpson 13 Feb '04

13 Feb '04

I'm getting several TypeErrors when I run 'make test' on the HEAD. Each of them involves a call to cAccessControl's 'validate' with 'roles' set to a PermissionRole instance, complaining that it's not iterable. Any ideas? Cheers, Evan @ 4-am

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This is a good time for people who care about packaging to get involved ;)
by Jim Fulton 13 Feb '04

13 Feb '04

This would be a good time for people interested and knowledgeable about packaging systems and who want to influence the direction we take with Zope 3 to get involved. :) Jim -- Jim Fulton mailto:jim@zope.com Python Powered! CTO (540) 361-1714 http://www.python.org Zope Corporation http://www.zope.com http://www.zope.org

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Strange loop with ZCatalog
by Pascal Samuzeau 13 Feb '04

13 Feb '04

Hi, For some tests I have done : - Create about 5000 folders under the Root Zope Site - Inside those folders, I have created about 30 000 objects ( as document, just an id, title and a Type). - I've catalogued all inside a catalog named TheCatalog I have written just this function, in intend to test my CPU ( that why I've written it like this): allobject = context.TheCatalog.searchResults(Type='TypeTest') l=len(allobject) i = 0 #for i in range(len(allobject)): for object in allobject: #path = allobject[i].getPath() #course = allobject[i][0] path = allobject.getPath() course = allobject[0] thepath = string.split(path,'/') lepath = string.join(thepath[:-1],'/') lieu=context.restrictedTraverse(lepath) lieu.manage_delObjects(course) i+=1 return "Len: %s and Number parsed: %s" %(i,l) Phase A: I have 30 000 objects and the message following: Len: 30000 and Number parsed: 15001 In my catalog: 15000 object only were destroyed. !!! Phase B: I de-comment my comment lines, but I've got the same message. I try to understand what it happens, but I can't. Anyone has a brillant idea? Sincerily PS -------------------------------------------------- Oreka ! Nous sommes l'internet moins cher ! Surfez 25% moins cher avec http://www.oreka.com

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https with zope 2.7
by Thomas Anderson 13 Feb '04

13 Feb '04

A fairy clean way did exist in 2.6.x to get zope to generate "https:" instead of "http" in self referencing URLs, using Pound, and without standing on one leg and shaking a rattle at apache mod_proxy / rewrite. http://mail.zope.org/pipermail/zope/2004-February/thread.html#146614 The magic in z2.py happened by adding a new HTTPS server with: + try: + del HTTPS_ENV['HTTP'] + except KeyError: + pass + HTTPS_ENV['HTTPS']='ON' I'm not seeing an easy way to achieve the same in Zope 2.7, or perhaps I'm just not as familiar with the code yet. Could someone point me in the right direction?? Tom

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restrictedTraverse doesn't give the good container.
by Pascal Samuzeau 13 Feb '04

13 Feb '04

Hi, Today, I have this situation: Under my root Zope Site, I have this hierachy: - FolderA ---FolderB ----FolderC -----FolderC What is interesting is that a folder named "FolderC" appears under another folder named with the same name. Assuming the path is the good one (path=.../.../FolderB) I try : herenow = context.restrictedTraverse(path+'/FolderC') -> OK herenow = herenow.restrictedTraverse(path+'/FolderC') -> OK Now I just delete the last FolderC, I have: - FolderA ---FolderB ----FolderC I try : herenow = context.restrictedTraverse(path+'/FolderC') -> OK herenow = herenow.restrictedTraverse(path+'/FolderC') -> OK BUT here I'm just not where I think to be, just because of the acquisition !!! I have no time to have a look on this, but anyone have seen this problem and resolved it? Sincerily PS -------------------------------------------------- Oreka ! Nous sommes l'internet moins cher ! Surfez 25% moins cher avec http://www.oreka.com

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Put an adapted object in context
by Santi Camps 13 Feb '04

13 Feb '04

Hi all, Following your instructions and seeing Skin Product code, I've been able to write a simple way to register Apdaters in my applications that are applied to specific meta_type objects during publishing. This is now working fine. I can write an Adapter in my application and say "use this adapter for all objects of meta_type 'Folder'". The adapter to apply of the same object may change depending of user and the application he is using. My problem is that the adapter object, and also the adapted object contained in it, are out of publisher context or something like this. For instance, absolute_url() methods doesn't work becouse REQUEST is not defined. If I add REQUEST manually to the object, the absolute_url returns the object Id, but not the entire path. I can inspect absolute_url code and try to provide needed information to make work, but I'm sure that somewhere should be a method to put my object in the current publishing context. Anybody knows about this? Thanks a lot for your help. -- Santi Camps http://zetadb.sourceforge.net

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RE: [Zope-dev] How to make Zope fail nicely under high load?
by Bjorn Stabell 13 Feb '04

13 Feb '04

Erik: > using the _v_ variables won't work for this since different threads > won't agree on who was latest. Its definitely a bad idea to > do queries > for these three data points. What about putting them in the > temp_folder then you can still use ZEO with a bunch of clients that > will all share the same data but you don't need to write the > values to > disk every time they change. Even putting them in a normal ZODB > storage would be a _lot_ faster than doing a query. You're right, _v_ wouldn't work. So with temp_folder (TemporaryStorage) there is basically no need for the SharedResource product anymore? For ZEO, my understanding is that we would still have to store the values in the ZODB, though. Regards, -- Bjorn

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RE: [Zope-dev] How to make Zope fail nicely under high load?
by Bjorn Stabell 13 Feb '04

13 Feb '04

Toby wrote: > > One of the optimization we're thinking of is storing results of > > ZCatalog searches (e.g., number of replies to postings) in volatile > > variables so we don't have to run the catalog search at all. We'd > > like to use memory space shared between threads for this. > > Using ZEO would require us to store this in the ZODB. > > Storing that in ZODB would be a bad idea. Theres no reason to > think that this cache would be faster than ZCatalog. > > I dont see why you would be *required* to store in ZODB... > just dont share your cache between publisher threads on different > Zope instances. > > (my apologies if this is obvious) Okay, for example, since it's a BBS we need to have quick access to: the latest poster the latest posting the latest registered member All of these are complex queries (in the case of the latest registered member it's not even a query but a brute-force search). What I think most ASP/PHP boards do is that they store these values in the database instead of querying for them all the time. Since many of these can be found through queries, they don't really need persistent storage, but updates need to be seen by all threads; thus the requirement for ZODB if we use ZEO, but the possibility to use (even faster) shared memory if we don't use ZEO. In effect we want to do something like this: def getLatestPoster(self): if not hasattr(self, '_v_latestPoster'): self._v_latestPoster = whatever_query() return self._v_latestPoster return self._v_latestPoster def setLatestPoster(self, poster): self._v_latestPoster = poster But instead of having thread-local variables we wanted to use Dieter Maurer's SharedResource in order to share the cache between threads: http://www.dieter.handshake.de/pyprojects/zope/SharedResource.html Regards, -- Bjorn

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