[Zope-Checkins] SVN: zdaemon/trunk/src/zdaemon/tests/testzdrun.py testRunIgnoresParentSignals(): Try to fix an
Log message for revision 40791:
testRunIgnoresParentSignals(): Try to fix an
intermittent test-killing race between this test
and zdrun.py fighting over who deletes the
test socket first.
Changed:
U zdaemon/trunk/src/zdaemon/tests/testzdrun.py
-=-
Modified: zdaemon/trunk/src/zdaemon/tests/testzdrun.py
===
--- zdaemon/trunk/src/zdaemon/tests/testzdrun.py2005-12-15 16:58:31 UTC
(rev 40790)
+++ zdaemon/trunk/src/zdaemon/tests/testzdrun.py2005-12-15 20:30:13 UTC
(rev 40791)
@@ -248,7 +248,22 @@
# Kill the process.
send_action('exit\n', zdrun_socket)
finally:
-shutil.rmtree(tmp)
+# Remove the tmp directory.
+# Caution: this is delicate. The code here used to do
+# shutil.rmtree(tmp), but that suffers a sometimes-fatal
+# race with zdrun.py. The 'testsock' socket is created
+# by zdrun in the tmp directory, and zdrun tries to
+# unlink it. If shutil.rmtree sees 'testsock' too, it
+# will also try to unlink it, but zdrun may complete
+# unlinking it before shutil gets to it (there's more
+# than one process here). So, in effect, we code a
+# 1-level rmtree inline here, suppressing errors.
+for fname in os.listdir('.'):
+try:
+os.unlink(os.path.join(tmp, fname))
+except os.error:
+pass
+os.rmdir(tmp)
def testUmask(self):
# people have a strange tendency to run the tests as root
___
Zope-Checkins maillist - Zope-Checkins@zope.org
http://mail.zope.org/mailman/listinfo/zope-checkins
[Zope-Checkins] SVN: Zope/branches/2.9/lib/python/ New zdaemon.
Log message for revision 40794: New zdaemon. Should repair the latest intermittent failures in testRunIgnoresParentSignals. Changed: _U Zope/branches/2.9/lib/python/ -=- Property changes on: Zope/branches/2.9/lib/python ___ Name: svn:externals - ZConfigsvn://svn.zope.org/repos/main/ZConfig/tags/ZConfig-2.3.1 BTrees svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/BTrees persistent svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/persistent ThreadedAsync svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ThreadedAsync transactionsvn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/transaction ZEOsvn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ZEO ZODB svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ZODB ZopeUndo svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ZopeUndo zdaemon-r 39732 svn://svn.zope.org/repos/main/zdaemon/trunk/src/zdaemon pytz svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/pytz zodbcode svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/zodbcode ClientCookie svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/ClientCookie mechanize svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/mechanize + ZConfigsvn://svn.zope.org/repos/main/ZConfig/tags/ZConfig-2.3.1 BTrees svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/BTrees persistent svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/persistent ThreadedAsync svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ThreadedAsync transactionsvn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/transaction ZEOsvn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ZEO ZODB svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ZODB ZopeUndo svn://svn.zope.org/repos/main/ZODB/tags/3.6.0b4/src/ZopeUndo zdaemon-r 40792 svn://svn.zope.org/repos/main/zdaemon/trunk/src/zdaemon pytz svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/pytz zodbcode svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/zodbcode ClientCookie svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/ClientCookie mechanize svn://svn.zope.org/repos/main/Zope3/tags/Zope-3.2.0b1/src/mechanize ___ Zope-Checkins maillist - Zope-Checkins@zope.org http://mail.zope.org/mailman/listinfo/zope-checkins
Re: [Zope-dev] RFV: Unicode in Zope 2
Hello. At Fri, 09 Dec 2005 10:11:42 -0500, Jim Fulton wrote: - Common approach to Unicode In particular, In Zope 3, all text is stored and managed as Unicode. The publisher decodes request data and encodes response data. The vast majority of application and library code can ignore encoding issues. (The exceptions are applications and frameworks that need to exhange text with non-Unicode-aware external systems.) This has provided great simplifications and allowed us to avoid common pitfals from mixing Unicode and encoded text. We need to migrate Zope 2 to use a similar strategy. We need volunteers to brainstorm how this can be done and make one or more proposals. This is likely a prerequisite for finishing the publisher and ZPT work. I want to tackle this problem, because I use japanese and I have experienced the encode/decode error pitfalls in a last few years. I'm wrong, I didn't touch zope development and didn't read the list carefully. In zope2.8, there is a zpt problem and this is a same pitfall. (unicode and string are mixed in TAL) -- TAHARA Yusei [EMAIL PROTECTED] ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Zope tests: 5 OK, 3 Failed
Yup, that box is slowly dying on me. I will take down the nightlies until I find a new machine to run them on. Stefan On 14. Dez 2005, at 15:35, Chris McDonough wrote: FYI: These tests appear to be failing due to a race in the tests they're exercising that could be exposed if the machine was under heavy load or just particularly slow. -- Anything that happens, happens. --Douglas Adams ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: sessions in the presence of conflicts
[Using zope-dev@ instead of [EMAIL PROTECTED] Dennis Allison wrote: A more session-friendly conflict resolution might use: 1. if any of the states are invalid (that is, has a key '_invalid') return the invalid state. 2. if any any of the states attributes ['token','id','_created'] differ then there is a conflict, raise the conflict exception. 3. order the newState and savedState by modification time (or if that cannot be computed, by access time). 4. any key appearing in oldState's dictionary but not appearing in both savedState and newState should be removed from all. This corresponds to a key-value pair being deleted in one of the transactions. Insertions will be managed automatically by the updates. 5. beginning with the oldest, update oldState dictionary of key-value pairs using the dictionary part of newState and savedState. Return oldState. This does several things. First, it captures independent key-value changes made in both potentially conflicting transactions. Second, it provides a reasonable ordering for multiple (potentially conflicting) key-value pair updates. Third, it manages insertions and deletions to the session variable set in the presence of conflicts. Does this make sense? I have yet to figure out how to map a TransientObject state back to the object it represents, but it clearly is possible. I certainly makes sense from a high level description, but the devil is in the details. I'd be interested in looking at it if you code something. Florent -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of RD +33 1 40 33 71 59 http://nuxeo.com [EMAIL PROTECTED] ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
[Zope-dev] Zope tests: 3 OK, 3 Failed, 2 Unknown
Summary of messages to the zope-tests list. Period Wed Dec 14 12:01:01 2005 UTC to Thu Dec 15 12:01:01 2005 UTC. There were 8 messages: 8 from Zope Unit Tests. Test failures - Subject: FAILED (failures=1) : Zope-2_7-branch Python-2.4.2 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:13:22 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003797.html Subject: FAILED : Zope-2_9-branch Python-2.4.2 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:17:52 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003800.html Subject: FAILED : Zope-trunk Python-2.4.2 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:19:23 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003801.html Unknown --- Subject: UNKNOWN : Zope-2_8-branch Python-2.3.5 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:14:52 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003798.html Subject: UNKNOWN : Zope-2_8-branch Python-2.4.2 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:16:22 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003799.html Tests passed OK --- Subject: OK : Zope-2_6-branch Python-2.1.3 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:08:52 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003794.html Subject: OK : Zope-2_6-branch Python-2.3.5 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:10:22 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003795.html Subject: OK : Zope-2_7-branch Python-2.3.5 : Linux From: Zope Unit Tests Date: Wed Dec 14 22:11:52 EST 2005 URL: http://mail.zope.org/pipermail/zope-tests/2005-December/003796.html ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: RFV: Unicode in Zope 2
Florent Guillaume wrote: Martijn Faassen wrote: [snip] What I'm worried about doing this for old code, but some steps will probably become clear during the brainstorming session. Migration tools that turn strings in the ZODB into unicode ones magically (with the ability to spell out exceptions and encoding)? Tricky... I'd start by adding some deprecation warnings at the places where PlacelessTranslationService (or Localizer for that matter) do their workarounds so that normally incompatible types are mixed together. With the most recent Silva under development, we're not using either anymore, so someone else would have to do this. Where would you put the deprecation warning in PTS? It monkey patches the ZPT engine, and in particular its StringIO object, to make sure that UTF-8 strings and unicode strings, when finally concatenated at the end after page template generation, can actually be concatenated as it will first encode the unicode strings to UTF-8. The output of the page template will then be UTF-8. In Zope 2 without this in place, the output of the page template will be unicode, and if you put in UTF-8 strings (that aren't just ascii), the system will give rise to a UnicodeError when this concatenation takes place. I guess you could put some detection code in PTS's concatenation functionality to see whether anything unicode is mixed with non-ascii strings, and in that case output one deprecation warning. I have a suspicion that you'll see this warning whenever someone views a page template in Plone. :) Regards, Martijn ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RFV: Unicode in Zope 2
Andreas Jung wrote: --On 9. Dezember 2005 10:11:42 -0500 Jim Fulton [EMAIL PROTECTED] wrote: We need to migrate Zope 2 to use a similar strategy. We need volunteers to brainstorm how this can be done and make one or more proposals. This is likely a prerequisite for finishing the publisher and ZPT work. My ZPT integration of the Z3 templates will definitely only allow unicode. Non-unicode content must pass either an encoding or accept that it will be converted using utf8 as default encoding to unicode. Hm, so it auto-decodes non-unicode strings using UTF-8? That's a bit dangerous, as you suppress a large class of unicode errors in the code. Code that creates UTF-8 strings will be silently accepted. Not as bad as what PTS does, at least the output of the ZPT will be unicode, but scary nonetheless. Do you have any impression of how compatible is your code is with existing large Zope 2 codebases by the way? Regards, Martijn ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
[Zope-dev] user folder question
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hey all, I'm currently trying to setup a custom zope instance for our c.s. department at school. Currently we run a totally linux infrastructure with ldap authentication which we would also like to tie into zope. My question is not how to authenticate against ldap, but I was wondering if there is a way to disable the default user folder and in automagically put an ldapuser folder in its place on creation of a new instance. I'm kinda new to zope, and I'm sure it's possible, but if someone could at least point me in the right direction i would appreciate it. - --Chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDoaCiASJ6G3eRc6ARAk+7AKDpZpgQHZeMnlr0x9bJsgipGOcl3ACfayrw 0U1rhAAyISo7O76otdpVKBo= =hmSn -END PGP SIGNATURE- ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RFV: Unicode in Zope 2
--On 15. Dezember 2005 17:55:16 +0100 Martijn Faassen [EMAIL PROTECTED] wrote: Hm, so it auto-decodes non-unicode strings using UTF-8? That's a bit dangerous, as you suppress a large class of unicode errors in the code. Code that creates UTF-8 strings will be silently accepted. Not as bad as what PTS does, at least the output of the ZPT will be unicode, but scary nonetheless. Do you have any impression of how compatible is your code is with existing large Zope 2 codebases by the way? I would like to keep the code as strict as possible for now. When the final implementation is ready we must test it with Plone and CPS and see what problems will occur and how we can deal with them in a sane way (hopefully saner than the current implementation). Otherwise we could also stick with the current implementation :-) So there is currently no need to hurry..I hope to finish the work in January...enough time left for testing. -aj pgpsqibkdZvji.pgp Description: PGP signature ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: sessions in the presence of conflicts
Code would be good. Note that changing the transientobject conflict resolution algorithm won't get rid of all write conflict errors, because the BTree-based indexes in the transient object container will still conflict during a bucket split and other situations that I can't exactly recall (they're documented in the BTrees source code). In fact, before you spend a lot of time tuning the TO conflict resolution algorithm, you should make sure that the majority of conflicts you're seeing do indeed come out of attempting to resolve conflicting transientobject states (as per the conflict error traceback). Conflict resolution algorithms are difficult and any algorithm will have DWIM-y tradeoffs, so it's useful to keep it as simple as possible. Note also that if you store your session data in a ZEO server in order to do *any* transience write conflict resolution, the ZEO server process needs to have Products.Transience on its PYTHONPATH (as it needs access to the resolution code). You also still haven't told us if you've tuned any of the knobs that I recommended you tune, so if you haven't, do that first. ;-) - C On Dec 15, 2005, at 5:35 AM, Florent Guillaume wrote: [Using zope-dev@ instead of [EMAIL PROTECTED] Dennis Allison wrote: A more session-friendly conflict resolution might use: 1. if any of the states are invalid (that is, has a key '_invalid') return the invalid state. 2. if any any of the states attributes ['token','id','_created'] differ then there is a conflict, raise the conflict exception.3. order the newState and savedState by modification time (or if that cannot be computed, by access time). 4. any key appearing in oldState's dictionary but not appearing in both savedState and newState should be removed from all. Thiscorresponds to a key-value pair being deleted in one of thetransactions. Insertions will be managed automatically bythe updates. 5. beginning with the oldest, update oldState dictionary of key-valuepairs using the dictionary part of newState and savedState. ReturnoldState. This does several things. First, it captures independent key-value changes made in both potentially conflicting transactions. Second, it provides a reasonable ordering for multiple (potentially conflicting) key-value pair updates. Third, it manages insertions and deletions to the session variable set in the presence of conflicts. Does this make sense? I have yet to figure out how to map a TransientObject state back to the object it represents, but it clearly is possible. I certainly makes sense from a high level description, but the devil is in the details. I'd be interested in looking at it if you code something. Florent -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of RD +33 1 40 33 71 59 http://nuxeo.com [EMAIL PROTECTED] ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
RE: [ZODB-Dev] Re: [Zope-dev] Re: sessions in the presence of conflicts
[Chris McDonough] Note that changing the transientobject conflict resolution algorithm won't get rid of all write conflict errors, because the BTree-based indexes in the transient object container will still conflict during a bucket split and other situations that I can't exactly recall (they're documented in the BTrees source code). A more readable account is here: http://www.zope.org/Wikis/ZODB/BTreeConflictResolution BTrees are mappings too, and looks like Dennis is trying to apply similar conflict-resolution rules to session mapping objects. Conflict resolution algorithms are difficult and any algorithm will have DWIM-y tradeoffs, so it's useful to keep it as simple as possible. Or no more complex as is actually helpful ;-) ... [Dennis Allison] I have yet to figure out how to map a TransientObject state back to the object it represents, but it clearly is possible. I didn't see a response to that bit yet, so: the state of an object P is whatever P.__getstate__() returns. Given such a return value `state`, and some object Q of the same type as P, Q.__setstate__(state) gives Q the same state P had. What state means is entirely up to the type's __setstate__() and __getstate__() implementations (if any). Objects deriving from Persistent inherit (by default) implementations that retrieve and update an instance's __dict__. BTrees.Length is a good example of a class that overrides these methods, using an integer as the state. ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: sessions in the presence of conflicts
Zope 2.8.4, ZODB 3.4.2 Chris, I'm pretty sure that I mentioned having done that in one of my postings. I have followed your recommendations, but the problem remains. (um... persists grin) The systems are running a Zope/ZEO combination with a store configuration of: # zodb_db temporary # Temporary storage database (for sessions) temporarystorage name temporary storage for sessioning /temporarystorage mount-point /temp_folder container-class Products.TemporaryFolder.TemporaryContainer /zodb_db # # ZEO client storage: # zodb_db main mount-point / # ZODB cache, in number of objects cache-size 5000 zeoclient server 192.168.0.92:8301 storage 1 var $INSTANCE/var # ZEO client cache, in bytes cache-size 20MB # Uncomment to have a persistent disk cache client group1-zeo /zeoclient /zodb_db # Although the connection to ZEO is via a network port, it runs on the same physical hardware. TemporaryStorage is not transactional. Does it need to be under MVCC? TemporaryStorage does provide a conflict cache to do rudimentary conflict resolution. There are several timing and scaling parameters that need to be considered: CONFLICT_CACHE_MAXAGE = 60 (seconds) CONFLICT_CACHE_GCEVERY = 60 (seconds) RECENTLY_GC_OIDS_LEN = 200 Entries in the recently gc's oids list are those which may be resolvable by a retry. These numbers may be too small given the loads we see and the number of accesses made to the session variables. I plan to incrase them to see if there is any impact. MAYBE CONFLICTS AND THEIR RESOLUTION ARE NOT THE ROOT CAUSE OF THE SESSION VARIABLE PROBLEM. The observed problem is that session variables suddenly disappear. At the point of failure due to a KeyError, inspecting the SESSION object shows two failure modes: either all the session variables are gone and only the container remains or most of the session variables are gone and a few remain. 74769573A2H7SIH2AKo=id: 11343269231636975299, token: 74769573A2H7SIH2AKo, contents keys: ['currentTab', 'calendarPage', 'currentCourse', 'currentTextbook'] and 77307574A2HTTdXCYYg=id: 11343267811075063138, token: 77307574A2HTTdXCYYg, contents keys: [] Access to the session variables are almost alwsys through a pair of Scripts(Python). Occasionally a session variable is read with an expression of the form REQUEST['SESSION']['key']. ## Script (Python) getSessionVariable ##bind container=container ##bind context=context ##bind namespace= ##bind script=script ##bind subpath=traverse_subpath ##parameters=varname ##title= ## request=container.REQUEST session=request['SESSION'] return session[varname] # Script (Python) setSessionVariable ##bind container=container ##bind context=context ##bind namespace= ##bind script=script ##bind subpath=traverse_subpath ##parameters=var, val ##title= ## request = container.REQUEST RESPONSE = request.RESPONSE session=request['SESSION'] session[var]=val request.set( 'SESSION', session ) This all seems right to me. Any suggestions as to how to localized when the session variables get lost? That might help localize the root cause. ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: sessions in the presence of conflicts
Trimmed zodb-dev off the cc list.
On Dec 15, 2005, at 2:24 PM, Dennis Allison wrote:
The systems are running a Zope/ZEO combination with a store
configuration
of:
#
zodb_db temporary
# Temporary storage database (for sessions)
temporarystorage
name temporary storage for sessioning
/temporarystorage
mount-point /temp_folder
container-class Products.TemporaryFolder.TemporaryContainer
/zodb_db
OK, that's good. Having a nonzeo session database is a good thing.
Although the connection to ZEO is via a network port, it runs on
the same
physical hardware.
TemporaryStorage is not transactional. Does it need to be under MVCC?
I thought we sewed this one up. ;-) It is indeed transactional. See
our email conversations around 11/15/2005 and beyond.
TemporaryStorage does provide a conflict cache to do rudimentary
conflict
resolution. There are several timing and scaling parameters that
need to
be considered:
CONFLICT_CACHE_MAXAGE = 60 (seconds)
CONFLICT_CACHE_GCEVERY = 60 (seconds)
RECENTLY_GC_OIDS_LEN = 200
Entries in the recently gc's oids list are those which may be
resolvable
by a retry.
These numbers may be too small given the loads we see and the
number of
accesses made to the session variables. I plan to incrase them to see
if there is any impact.
That's fine.
MAYBE CONFLICTS AND THEIR RESOLUTION ARE NOT THE ROOT CAUSE OF THE
SESSION
VARIABLE PROBLEM.
That's possible.
either all the session variables
are gone and only the container remains or most of the session
variables
are gone and a few remain.
The former sounds like the session may have expired. The second
sounds like it could be due to conflict resolution. You don't say
where the KeyError is raised from, that's important.
74769573A2H7SIH2AKo=id: 11343269231636975299, token:
74769573A2H7SIH2AKo,
contents keys: ['currentTab', 'calendarPage', 'currentCourse',
'currentTextbook']
and
77307574A2HTTdXCYYg=id: 11343267811075063138, token:
77307574A2HTTdXCYYg,
contents keys: []
Note that these are actually two different session objects (see the
token). I don't know if this is meaningful.
Access to the session variables are almost alwsys through a pair of
Scripts(Python). Occasionally a session variable is read with an
expression of the form REQUEST['SESSION']['key'].
## Script (Python) getSessionVariable
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=varname
##title=
##
request=container.REQUEST
session=request['SESSION']
return session[varname]
How about session.get('varname') instead? What happens when the
session expires? Do you deal with that in your code in some way?
# Script (Python) setSessionVariable
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=var, val
##title=
##
request = container.REQUEST
RESPONSE = request.RESPONSE
session=request['SESSION']
session[var]=val
request.set( 'SESSION', session )
This all seems right to me. Any suggestions as to how to localized
when
the session variables get lost? That might help localize the root
cause.
What is request.set('SESSION', session) supposed to do? Whatever
it's supposed to be doing is probably not what you think it's doing.
I actually don't know quite what the impact of doing that would be;
it would depend on your other code. Remove that, it can't do
anything good. ;-) If you're trying to make sure the session is re-
stored in the ZODB, you needn't. You only need to do this for
mutable variables *in* the session, eg.:
request.SESSION['a'] = {}
a = request.SESSION['a']
a['b'] = 'c'
# here it comes
request.SESSION['a'] = a
I also enumerated other knobs to you in previous emails that could
help reduce sessioning conflicts (like turning off inband
housekeeping -- see the Transience.py code for that -- and bumping up
transient object container timeout resolution via session-timeout-
resolution in zope.conf in your current config). Those are the
things I meant when I said that you hadn't told us whether you had
taken steps based on recommendations. I won't enumerate them here
again here as it should be reasonably easy to go look in the archives
or your mail history for those recommendations. I'd suggest trying
these recommendations before playing around with conflict resolution
code. Dunny also suggested trying to mess with the WRITEGRANULIARITY
in TransientObject.py, FWIW.
- C
___
Zope-Dev maillist - Zope-Dev@zope.org
http://mail.zope.org/mailman/listinfo/zope-dev
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope )
[Zope-dev] buildbot failure in Zope branches 2.9 2.4 Windows 2000 zc-bbwin
The Buildbot has detected a failed build of Zope branches 2.9 2.4 Windows 2000 zc-bbwin. Buildbot URL: http://buildbot.zope.org/ Build Reason: changes Build Source Stamp: 2241 Blamelist: ctheune,jim,tim_one,tseaver,yuppie BUILD FAILED: failed test sincerely, -The Buildbot ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
[Zope-dev] FTP Upload killing Zope
I would like to merge this patch to all the branches back to Zope 2.7, anyone would care to review or is against it? http://www.zope.org/Collectors/Zope/1976 -- Sidnei da Silva Enfold Systems, LLC. http://enfoldsystems.com ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: sessions in the presence of conflicts
On 12/16/05, Dennis Allison [EMAIL PROTECTED] wrote: MAYBE CONFLICTS AND THEIR RESOLUTION ARE NOT THE ROOT CAUSE OF THE SESSION VARIABLE PROBLEM. The observed problem is that session variables suddenly disappear. Perhaps your app is tripping over some bug in conflict handling. But I'd say it is worth entertain other ideas too. For now, just comment out all of TransientObject._p_resolveConflict and if you still get errors then you know you have to look elsewhere. (Sure, some of that elsewhere may well include the conflict resolution code above _p_resolveConflict.) Your application and sessions should cope just fine in the face of any ConflictError. ConflictError's are an essential part of the machinery that keeps data state consistent. As Chris mentions, look at how your using sessions and some of the assumptions you might be making. Might be useful to try with sessions that don't timeout, set session-timeout-minutes to 0. And try maximum-number-of-session-objects of 0. Also trying the turning those knobs the other way, session-timeout-minutes of 1 and maximum-number-of-session-objects of 2. For now, stay focused on making sure you maintain a consistent state. Only once you have a consistent state then is it worth trying to improve the rate of ConflictErrors. (Which in your case of sessions lasting for many hours I think the numbers you quote elsewhere are too small. And, yeah, an alternative implementation for _p_resolveConflict might help there. Personally I prefer the simple approach of just commenting that out completely and living with a slightly higher conflict count.) Might be worth trying without ZEO in the mix. Definitely worth the effort, if you have not already, to recreate the whole system on a separate host that you can feel comfortable making changes to. Then you can happily tune the various knobs downwards which may help with trying to observe the problem. For example session-timeout-minutes of 1. cheers michael ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] FTP Upload killing Zope
Looks good! On Dec 15, 2005, at 4:47 PM, Sidnei da Silva wrote: I would like to merge this patch to all the branches back to Zope 2.7, anyone would care to review or is against it? http://www.zope.org/Collectors/Zope/1976 -- Sidnei da Silva Enfold Systems, LLC. http://enfoldsystems.com ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] FTP Upload killing Zope
I would like to consider the 2.7 branch closed for any kind of fixes except security related fixes. I don't plan any further 2.7 releases. -aj --On 15. Dezember 2005 21:53:38 -0500 Chris McDonough [EMAIL PROTECTED] wrote: Looks good! On Dec 15, 2005, at 4:47 PM, Sidnei da Silva wrote: I would like to merge this patch to all the branches back to Zope 2.7, anyone would care to review or is against it? http://www.zope.org/Collectors/Zope/1976 -- Sidnei da Silva Enfold Systems, LLC. http://enfoldsystems.com ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope ) pgppyaMb5KeBx.pgp Description: PGP signature ___ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
[Zope] Re: Programmatically flushing entries from RAM cache?
John Barham wrote: Is it possible to flush a path w/ a specific argument from a RAM cache from a Python script? Here's my situation: I have a script FolderExists() that takes a single path argument and, after running an SQL query, returns True or False if the folder path exists or not in the database. Since the database query is relatively expensive, I want to cache its result in RAM. However, if a folder is created (using another Python script in the same Zope instance) I want to flush the cached result for the path (i.e., I don't want to flush all of the cached entries for the FolderExists method if that can be avoided). Unfortunately no, it's a deficiency of the simple RAMCacheManager: you can't invalidate a key individually, you have to invalidate them all. Changing this is probably not too complex, and is (low) on my TODO list (at position approx. 136 ;)). Florent -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of RD +33 1 40 33 71 59 http://nuxeo.com [EMAIL PROTECTED] ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Stepper 1.4.1 Released!
Stepper is a framework for performing asynchronous tasks on Zope servers. This is a bug fix release that corrects some problems with the 1.4.0 release. The major bugs fixed for this release were: - Write conflict errors are now handled in the same way as read conflict errors. - Stepper is no longer left locked if a conflict error occurs. - Nothing is now logged to the console in quiet mode, even with Zope 2.8. Several other small bugs were also fixed. For more information, please see: http://www.simplistix.co.uk/software/zope/stepper cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Zope 2.8.4+Latest cygwin installation
Hi, I would like to know if anyone has been able to compile and run Zope 2.8.4 with Cygwin. I just installed cygwin with latest stable packages. I compiled python 2.4.2 (I know, not the supported version, so I am about to try 2.3.5 now) I had issues with the socket module, and from google I applied a workaround that worked fine : in Modules/socketmodule.c Change : #if defined(__sgi) !defined(INET_ADDRSTRLEN) #define INET_ADDRSTRLEN 16 #endif To : /*#if defined(__sgi) !defined(INET_ADDRSTRLEN)*/ #define INET_ADDRSTRLEN 16 /*#endif*/ I made several python tests and all looks fine. Then I compiled Zope 2.8.4 without any issue. But when I run it, I get this error: Site Error An error was encountered while publishing this resource. exceptions.TypeError Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 187, in publish_module_standard Module Products.Localizer, line 58, in new_publish Module ZPublisher.Publish, line 144, in publish Module Zope2.App.startup, line 174, in zpublisher_exception_hook Module App.ZApplication, line 60, in __bobo_traverse__ Module UserDict, line 17, in __getitem__ Module ZODB.Connection, line 704, in setstate Module ZODB.Connection, line 760, in _setstate Module ZODB.serialize, line 495, in setGhostState Module ZODB.serialize, line 488, in getState Module ZODB.serialize, line 436, in _persistent_load Module ZODB.Connection, line 208, in get Module ZODB.serialize, line 482, in getGhost TypeError: Acquirer.__new__(Application) is not safe, use Persistence.Persistent.__new__() Does anyone know what I can do ? Thanks a lot. Pascal ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ** ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
RE: [Zope] Zope 2.8.4+Latest cygwin installation
Ok, just found it has already been reported several months ago, even with python 2.3.x: http://www.zope.org/Collectors/Zope/1725 Does someone know of any kind of temporary workaround for this ? Thanks ! Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:25 À : zope@zope.org Objet : [Zope] Zope 2.8.4+Latest cygwin installation Hi, I would like to know if anyone has been able to compile and run Zope 2.8.4 with Cygwin. I just installed cygwin with latest stable packages. I compiled python 2.4.2 (I know, not the supported version, so I am about to try 2.3.5 now) I had issues with the socket module, and from google I applied a workaround that worked fine : in Modules/socketmodule.c Change : #if defined(__sgi) !defined(INET_ADDRSTRLEN) #define INET_ADDRSTRLEN 16 #endif To : /*#if defined(__sgi) !defined(INET_ADDRSTRLEN)*/ #define INET_ADDRSTRLEN 16 /*#endif*/ I made several python tests and all looks fine. Then I compiled Zope 2.8.4 without any issue. But when I run it, I get this error: Site Error An error was encountered while publishing this resource. exceptions.TypeError Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 187, in publish_module_standard Module Products.Localizer, line 58, in new_publish Module ZPublisher.Publish, line 144, in publish Module Zope2.App.startup, line 174, in zpublisher_exception_hook Module App.ZApplication, line 60, in __bobo_traverse__ Module UserDict, line 17, in __getitem__ Module ZODB.Connection, line 704, in setstate Module ZODB.Connection, line 760, in _setstate Module ZODB.serialize, line 495, in setGhostState Module ZODB.serialize, line 488, in getState Module ZODB.serialize, line 436, in _persistent_load Module ZODB.Connection, line 208, in get Module ZODB.serialize, line 482, in getGhost TypeError: Acquirer.__new__(Application) is not safe, use Persistence.Persistent.__new__() Does anyone know what I can do ? Thanks a lot. Pascal ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ** ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] batching help
Hello all , I'm trying to display on the same page a table with (3
columns) with content from a list . I'm trying to batch the results so
that every 3 elements anothe row is created.
Can anyone give me a clue how to do that ?
this is my code:
table tal:define=Rnumber
python:context.cm1.content.specialfile.getList('link_list') ; batch
python:modules['ZTUtils'].Batch(Rnumber,size=3,start=0)
th colspan=3Main Title/th
trthTitle 1/ththTitle 2/ththTitle 3/th/tr
tr
td tal:repeat=num batch
span tal:condition=python:num 3
tal:replace=structure num content goes here.. /span
/td
/tr
!-- tr
td tal:repeat=num batch
span tal:replace=structure num
Material goes here /span
/td
/tr --
/table
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] batching help
Hi
I suggest to use the following function that
def get_grouped_list(self, seq=[], size=3):
#get the list with all items grouped
return [seq[i:i+size] for i in range(0, len(seq), size)]
that takes as parameter a list and goups items in slices with length = size.
def get_grouped_list(seq=[], size=3):
... return [seq[i:i+size] for i in range(0, len(seq), size)]
...
l = [1,2,3,4,5,6,7,8]
get_grouped_list(l)
[[1, 2, 3], [4, 5, 6], [7, 8]]
get_grouped_list(l, 4)
[[1, 2, 3, 4], [5, 6, 7, 8]]
Then iterating this is something like:
tr tal:repeat=slice python:someobject.get_grouped_list(yourlist)
td tal:repeat=item slice
span tal:replace=item /
/td
/tr
Hope this will help.
Dragos
Nicolas Georgakopoulos wrote:
Hello all , I'm trying to display on the same page a table with (3
columns) with content from a list . I'm trying to batch the results so
that every 3 elements anothe row is created.
Can anyone give me a clue how to do that ?
this is my code:
table tal:define=Rnumber
python:context.cm1.content.specialfile.getList('link_list') ; batch
python:modules['ZTUtils'].Batch(Rnumber,size=3,start=0)
th colspan=3Main Title/th
trthTitle 1/ththTitle 2/ththTitle 3/th/tr
tr
td tal:repeat=num batch
span tal:condition=python:num 3
tal:replace=structure num content goes here.. /span
/td
/tr !-- tr
td tal:repeat=num batch
span tal:replace=structure num
Material goes here /span
/td
/tr
-- /table
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists - http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
--
Dragos Chirila
Programmer, Finsiel Romania (http://www.finsiel.ro)
44A, Ficusului St. - 013975 Bucharest
Tel: +40 21 2320193, Fax: +40 21 2329807
Jabber: [EMAIL PROTECTED]
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Unauthorized exception when trying to access a list item
- Original Message - From: Cameron Beattie [EMAIL PROTECTED] To: zope@zope.org Sent: Thursday, December 15, 2005 1:25 AM Subject: Re: [Zope] Unauthorized exception when trying to access a list item Cameron Beattie wrote: I am trying to access a value in a list. The script getDIDS_list is passed a list called listoflists: list = listoflists ret = [] tup = (0,1,2) factortup = (1,2) factor = 2 for i in range(len(list)): # 1 == 1 if i in tup: if i in factortup: x = list[i] * factor etc The code is a bit strange due to my testing. However zope gets upset when trying to evaluate list[i]: You are not allowed to access '1' in this context Whats in your list? A protected item? Does this happen everytime or just with '1'? David The list consists of something like this: [61282125371L, 1, 6, 0]. It happens whatever element I try to access. I tried the following test script: list = [61282125371L, 1, 6, 0] ret = [] tup = (0,1,2) factortup = (1,2) factor = 2 for i in range(len(list)): if i in tup: if i in factortup: x = list[i] * factor print x return printed and it returned: 2 12 No errors, so it must be something else. Jonathan ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
--On 15. Dezember 2005 08:03:22 -0500 Jonathan [EMAIL PROTECTED] wrote: - Original Message - From: J Cameron Cooper It seems strange that one can, using plain vanilla python scripts, trap bare 'try/excepts' (and I agree with Andreas that this is not a good thing to do!) and that one can trap python built-in exceptions, but that one cannot trap zope exceptions. Why allow python scripts to trap zope exceptions using a bare try/except (and then have to re-raise everything except the target zope exception), but not allow python scripts to target specific zope exceptions? I don't see the reasoning behind this approach. My 2 cents: PythonScripts are restricted and are *not* thought to be a full replacement for Python modules. If you need this functionaltiy consider writing a Zope Product, using external methods or using TrustedExecutables. -aj pgpQyEjsXil5w.pgp Description: PGP signature ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
Jonathan schrieb: ... It seems strange that one can, using plain vanilla python scripts, trap bare 'try/excepts' (and I agree with Andreas that this is not a good thing to do!) and that one can trap python built-in exceptions, but that one cannot trap zope exceptions. Why allow python scripts to trap zope exceptions using a bare try/except (and then have to re-raise everything except the target zope exception), but not allow python scripts to target specific zope exceptions? I don't see the reasoning behind this approach. Well you can trap any exception which happens between your try and except. But not outside of these, of course. This is true everywhere (not even python only ;) Which exceptions do you believe you might be not able to catch? HTH Tino ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Trying zope on Linux
I'm trying zope on linux but I have come a cross a problem.I windows, I simply changedthe portnumber from 8080 to 80 inzope.conf so I could get to my site without typeing the port.But in Linux, I did the same thing but it always tells me that some other server already occupied this port. (and I just started too, so there shouldn't be any server. right??)I'm now trying to figure out what server to close but with no luck at all.. can someone help me so I can display my site on port 80? Yahoo! Shopping Find Great Deals on Holiday Gifts at Yahoo! Shopping ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trying zope on Linux
--On 15. Dezember 2005 05:20:33 -0800 Allen Huang [EMAIL PROTECTED] wrote: I'm trying zope on linux but I have come a cross a problem. I windows, I simply changed the port number from 8080 to 80 in zope.conf so I could get to my site without typeing the port. But in Linux, I did the same thing but it always tells me that some other server already occupied this port. (and I just started too, so there shouldn't be any server. right??) I'm now trying to figure out what server to close but with no luck at all.. can someone help me so I can display my site on port 80? The recommended way is to run Zope on some unpriveledged port and use Virtual hosting with Apache or Squid. CHeck the Virtual Hosting chapter of the Zope Book for details. -aj pgpBKX4UPFZtr.pgp Description: PGP signature ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
- Original Message - From: Tino Wildenhain [EMAIL PROTECTED] To: Jonathan [EMAIL PROTECTED] Cc: zope@zope.org Sent: Thursday, December 15, 2005 8:18 AM Subject: Re: [Zope] Trapping zope exceptions in python script Jonathan schrieb: ... It seems strange that one can, using plain vanilla python scripts, trap bare 'try/excepts' (and I agree with Andreas that this is not a good thing to do!) and that one can trap python built-in exceptions, but that one cannot trap zope exceptions. Why allow python scripts to trap zope exceptions using a bare try/except (and then have to re-raise everything except the target zope exception), but not allow python scripts to target specific zope exceptions? I don't see the reasoning behind this approach. Well you can trap any exception which happens between your try and except. But not outside of these, of course. This is true everywhere (not even python only ;) Which exceptions do you believe you might be not able to catch? I encountered this situation while trying to trap 'BadRequest'. Jonathan ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trying zope on Linux
Allen Huang schrieb: I'm trying zope on linux but I have come a cross a problem. I windows, I simply changed the port number from 8080 to 80 in zope.conf so I could get to my site without typeing the port. But in Linux, I did the same thing but it always tells me that some other server already occupied this port. (and I just started too, so there shouldn't be any server. right??) I'm now trying to figure out what server to close but with no luck at all.. can someone help me so I can display my site on port 80? You can basically do the same in Linux. You need to start zope as root (it switches to nobody or your configured user from zope.conf) to be able to bind port 80 - and you have to make sure no other program currently binds there (as apache or the like) netstat -lntp should tell you. Recommended, however (even more for productive sites) is at least a simple apache running in front of zope and zope using unprivilegued port (1024) and possibly non privilegued user even on start. HTH Tino ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
RE: [Zope] Zope 2.8.4+Latest cygwin installation
Ok, in case anyone is interested, this nasty code change made it : In Zope-2.8.4-final/lib/python/ZODB/serialize.py: Change : return klass.__new__(klass, *args) To : try: result=klass.__new__(klass, *args) except TypeError: result=Persistent.__new__(klass, *args) return result Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:51 À : zope@zope.org Objet : RE: [Zope] Zope 2.8.4+Latest cygwin installation Ok, just found it has already been reported several months ago, even with python 2.3.x: http://www.zope.org/Collectors/Zope/1725 Does someone know of any kind of temporary workaround for this ? Thanks ! Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:25 À : zope@zope.org Objet : [Zope] Zope 2.8.4+Latest cygwin installation Hi, I would like to know if anyone has been able to compile and run Zope 2.8.4 with Cygwin. I just installed cygwin with latest stable packages. I compiled python 2.4.2 (I know, not the supported version, so I am about to try 2.3.5 now) I had issues with the socket module, and from google I applied a workaround that worked fine : in Modules/socketmodule.c Change : #if defined(__sgi) !defined(INET_ADDRSTRLEN) #define INET_ADDRSTRLEN 16 #endif To : /*#if defined(__sgi) !defined(INET_ADDRSTRLEN)*/ #define INET_ADDRSTRLEN 16 /*#endif*/ I made several python tests and all looks fine. Then I compiled Zope 2.8.4 without any issue. But when I run it, I get this error: Site Error An error was encountered while publishing this resource. exceptions.TypeError Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 187, in publish_module_standard Module Products.Localizer, line 58, in new_publish Module ZPublisher.Publish, line 144, in publish Module Zope2.App.startup, line 174, in zpublisher_exception_hook Module App.ZApplication, line 60, in __bobo_traverse__ Module UserDict, line 17, in __getitem__ Module ZODB.Connection, line 704, in setstate Module ZODB.Connection, line 760, in _setstate Module ZODB.serialize, line 495, in setGhostState Module ZODB.serialize, line 488, in getState Module ZODB.serialize, line 436, in _persistent_load Module ZODB.Connection, line 208, in get Module ZODB.serialize, line 482, in getGhost TypeError: Acquirer.__new__(Application) is not safe, use Persistence.Persistent.__new__() Does anyone know what I can do ? Thanks a lot. Pascal ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ** ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev ) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
Andreas wrote: My 2 cents: PythonScripts are restricted and are *not* thought to be a full replacement for Python modules. If you need this functionaltiy consider writing a Zope Product, using external methods or using TrustedExecutables. If python scripts are restricted from accessing zExceptions (for security reasons???) then why allow python scripts to trap zExceptions in bare try/excepts? If the logic for not allowing zExceptions in plain vanilla python scripts is for security reasons, then allowing bare try/excepts would seem to be a security hole (though, I don't see the rationale for this). My 2 cents. Jonathan ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] batching help
Dragos Chirila wrote:
Hi
I suggest to use the following function that
def get_grouped_list(self, seq=[], size=3):
#get the list with all items grouped
return [seq[i:i+size] for i in range(0, len(seq), size)]
that takes as parameter a list and goups items in slices with length =
size.
def get_grouped_list(seq=[], size=3):
... return [seq[i:i+size] for i in range(0, len(seq), size)]
...
l = [1,2,3,4,5,6,7,8]
get_grouped_list(l)
[[1, 2, 3], [4, 5, 6], [7, 8]]
get_grouped_list(l, 4)
[[1, 2, 3, 4], [5, 6, 7, 8]]
Then iterating this is something like:
tr tal:repeat=slice python:someobject.get_grouped_list(yourlist)
td tal:repeat=item slice
span tal:replace=item /
/td
/tr
Hope this will help.
Dragos
Nicolas Georgakopoulos wrote:
Hello all , I'm trying to display on the same page a table with (3
columns) with content from a list . I'm trying to batch the results
so that every 3 elements anothe row is created.
Can anyone give me a clue how to do that ?
this is my code:
table tal:define=Rnumber
python:context.cm1.content.specialfile.getList('link_list') ; batch
python:modules['ZTUtils'].Batch(Rnumber,size=3,start=0)
th colspan=3Main Title/th
trthTitle 1/ththTitle 2/ththTitle 3/th/tr
tr
td tal:repeat=num batch
span tal:condition=python:num 3
tal:replace=structure num content goes here.. /span
/td
/tr !-- tr
td tal:repeat=num batch
span tal:replace=structure num
Material goes here /span
/td
/tr
-- /table
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists - http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
Thanks for your suggestion Dragos , I want to do it the zope batch way
(I suppose it is simpler) if I can...
I will keep in mind your function if nothing else can be done.
Thanks again.
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
... Try: context.afolder.manage_delObjects(['someitem']) where 'someitem' does not exist in 'afolder' works: try: context.afolder.manage_adlObjects(['nonexistent']) except Exception,x: if 'BadRequest' in repr(x): print bad request else: raise x :-) (Ok, this _is_ ugly, but at least works. Certainly these exception types should be importable or even immediately available for python scripts) ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
- Original Message - From: Tino Wildenhain [EMAIL PROTECTED] To: Jonathan [EMAIL PROTECTED]; zope@zope.org Sent: Thursday, December 15, 2005 8:48 AM Subject: Re: [Zope] Trapping zope exceptions in python script ... Try: context.afolder.manage_delObjects(['someitem']) where 'someitem' does not exist in 'afolder' works: try: context.afolder.manage_adlObjects(['nonexistent']) except Exception,x: if 'BadRequest' in repr(x): print bad request else: raise x :-) (Ok, this _is_ ugly, but at least works. Certainly these exception types should be importable or even immediately available for python scripts) Interesting work-around, but I agree that these exception types should be immediately available in plain vanilla python scripts. Jonathan ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
--On 15. Dezember 2005 09:08:20 -0500 Jonathan [EMAIL PROTECTED] wrote: - Original Message - From: Tino Wildenhain [EMAIL PROTECTED] Interesting work-around, but I agree that these exception types should be immediately available in plain vanilla python scripts. Patches + tests are welcome :-) -aj pgp4Ivu8J9Dnz.pgp Description: PGP signature ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trying zope on Linux
On 12/15/05, Allen Huang [EMAIL PROTECTED] wrote: I'm trying zope on linux but I have come a cross a problem. I windows, I simply changed the port number from 8080 to 80 in zope.conf so I could get to my site without typeing the port. But in Linux, I did the same thing but it always tells me that some other server already occupied this port. (and I just started too, so there shouldn't be any server. right??) You may be using a distro that starts Apache on boot. Check your init scripts. If you want Zope running on 80, you'll need to either disable the init script starting that other server, or configure that other server to run on a different port if you really want that service. That said, I agree with others about the standard way of running Zope (unprivileged user, high port, behind Apache or other). RB ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
Andreas Jung schrieb: --On 15. Dezember 2005 09:08:20 -0500 Jonathan [EMAIL PROTECTED] wrote: - Original Message - From: Tino Wildenhain [EMAIL PROTECTED] Interesting work-around, but I agree that these exception types should be immediately available in plain vanilla python scripts. Patches + tests are welcome :-) Yes, Jonathan: please file a bug report - best with a list of Exceptions to be made available :-) ++Tino ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: Zope 2.8.4+Latest cygwin installation
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Pascal Peregrina wrote: Ok, in case anyone is interested, this nasty code change made it : In Zope-2.8.4-final/lib/python/ZODB/serialize.py: Change : return klass.__new__(klass, *args) To : try: result=klass.__new__(klass, *args) except TypeError: result=Persistent.__new__(klass, *args) return result I think Jim is the only one who could explain what you see. I can't even find the place in the code which generates that error: $ find . -name *.py -o -name *.c | xargs grep is not safe ./RestrictedPython/RCompile.py:The UNPACK_SEQUENCE opcode is not safe because it extracts ./zope/security/untrustedpython/builtins.py:# It's better to say what is safe than it say what is not safe ./ZODB/tests/testmvcc.py:It is not safe, however, to read the current revision of a because $ Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:51 À : zope@zope.org Objet : RE: [Zope] Zope 2.8.4+Latest cygwin installation Ok, just found it has already been reported several months ago, even with python 2.3.x: http://www.zope.org/Collectors/Zope/1725 Does someone know of any kind of temporary workaround for this ? Thanks ! Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:25 À : zope@zope.org Objet : [Zope] Zope 2.8.4+Latest cygwin installation Hi, I would like to know if anyone has been able to compile and run Zope 2.8.4 with Cygwin. I just installed cygwin with latest stable packages. I compiled python 2.4.2 (I know, not the supported version, so I am about to try 2.3.5 now) I had issues with the socket module, and from google I applied a workaround that worked fine : in Modules/socketmodule.c Change : #if defined(__sgi) !defined(INET_ADDRSTRLEN) #define INET_ADDRSTRLEN 16 #endif To : /*#if defined(__sgi) !defined(INET_ADDRSTRLEN)*/ #define INET_ADDRSTRLEN 16 /*#endif*/ I made several python tests and all looks fine. Then I compiled Zope 2.8.4 without any issue. But when I run it, I get this error: Site Error An error was encountered while publishing this resource. exceptions.TypeError Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 187, in publish_module_standard Module Products.Localizer, line 58, in new_publish Module ZPublisher.Publish, line 144, in publish Module Zope2.App.startup, line 174, in zpublisher_exception_hook Module App.ZApplication, line 60, in __bobo_traverse__ Module UserDict, line 17, in __getitem__ Module ZODB.Connection, line 704, in setstate Module ZODB.Connection, line 760, in _setstate Module ZODB.serialize, line 495, in setGhostState Module ZODB.serialize, line 488, in getState Module ZODB.serialize, line 436, in _persistent_load Module ZODB.Connection, line 208, in get Module ZODB.serialize, line 482, in getGhost TypeError: Acquirer.__new__(Application) is not safe, use Persistence.Persistent.__new__() Does anyone know what I can do ? Thanks a lot. - -- === Tres Seaver +1 202-558-7113 [EMAIL PROTECTED] Palladion Software Excellence by Designhttp://palladion.com -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDoX+I+gerLs4ltQ4RAnnCAJ93gKFJn8j/BPXK91RuuTMutLzrHACgtB56 NH2tqYHS/JPITSoVefuqkRU= =CCbu -END PGP SIGNATURE- ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] List within a list - how to use in a page template
David H wrote: # python script # input: a tuple named tup of index items to include in list of lists, eg (1,3) and the list of lists #example input: listoflists = [[61282125371L, 1, 6, 0], [61282125379L, 1, 6, 0], [61282825240L, 6, 6, 0]] #example tup: (1,3) ret = [] for i in range(len(listoflists)): if i in tup: ret.append(x[i]) return ret Hmmm, I'd hypothesise that whatever is returning that list of lists is what needs to change :-S Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] dynamic js lists
[EMAIL PROTECTED] wrote: script type=text/javascript snip js mess /script That looks like pure javascript, right? In which case it's a pure js problem and this is the wrong list ;-) Try #javascript on irc.freenode.net... cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Plone not installing on Zope
Hi: I installed Zope 2.8.4 and moved all folders from the untarred Plone 2.1.1 download to the Products folder of the instance of Zope I'm running in my home directory. I have Python 2.3.5. However, as the Plone installation instructions mention, Plone Site does not show up in the drop down menu of items in the ZMI. I've tried different versions of Plone to no avail. What am I doing wrong here? Thanks Qass ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Plone not installing on Zope
--On 15. Dezember 2005 09:27:11 -0600 Qass [EMAIL PROTECTED] wrote: Hi: I installed Zope 2.8.4 and moved all folders from the untarred Plone 2.1.1 download to the Products folder of the instance of Zope I'm running in my home directory. I have Python 2.3.5. However, as the Plone installation instructions mention, Plone Site does not show up in the drop down menu of items in the ZMI. I've tried different versions of Plone to no avail. What am I doing wrong here? Use the plone-users mailing list (plone.org - contact). -aj pgpJGh9ce5sdj.pgp Description: PGP signature ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: Fwd: [Zope] zopectl or runzope just won't start zope
These sounds like Plone questions best asked on a Plone list... Chris Qass wrote: Thanks for your reply fm. The python version in my path is 2.3.5 and both python and zope were build from source. Zope is installed in /opt which is where the python 2.3.5 is too. I got rid of the zope instance I had running earlier and created a new instance in my home directory. Now when I run zopectl start from the /bin in the instance in my home directory I get the following error: . Traceback (most recent call last): File /opt/zope-2.8.4/lib/python/zdaemon/zdrun.py, line 719, in ? main() File /opt/zope-2.8.4/lib/python/zdaemon/zdrun.py, line 716, in main d.main(args) File /opt/zope-2.8.4/lib/python/zdaemon/zdrun.py, line 243, in main self.run() File /opt/zope-2.8.4/lib/python/zdaemon/zdrun.py, line 256, in run self.opensocket() File /opt/zope-2.8.4/lib/python/zdaemon/zdrun.py, line 278, in opensocket sock.bind(tempname) File string, line 1, in bind socket.error: (2, 'No such file or directory') I then tried to run 'runzope' and got the following which don't look like errors: /home/blah/zope/Products/PortalTransforms/TransformEngine.py:18: DeprecationWarning: The module, 'Products.CMFCore.CMFCorePermissions' is a deprecated compatiblity alias for 'Products.CMFCore.permissions'; please use the new module instead. from Products.CMFCore import CMFCorePermissions /home/blah/zope/Products/CMFCore/utils.py:629: DeprecationWarning: format_stx() will be removed in CMF 1.6. Please use StructuredText.StructuredText.HTML instead. DeprecationWarning) /home/sra/zope/Products/kupu/__init__.py:23: DeprecationWarning: The Zope package has been renamed to Zope2. Import of a package named 'Zope' is deprecated and will be disabled starting in Zope 2.11. import Zope /home/blah/zope/Products/CMFFormController/__init__.py:25: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: CMFFormController product_name='CMFFormController', icon='tool.gif', /home/blah/zope/Products/GroupUserFolder/__init__.py:99: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: GroupUserFolder , icon=tool.gif /home/sra/zope/Products/MimetypesRegistry/__init__.py:34: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: MimetypesRegistry icon=tool.gif, /home/blah/zope/Products/PloneLanguageTool/__init__.py:17: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: PloneLanguageTool icon='tool.gif', /home/sra/zope/Products/PortalTransforms/__init__.py:35: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: PortalTransforms icon=tool.gif, /home/blah/zope/Products/ResourceRegistries/__init__.py:20: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: ResourceRegistries icon = 'tool.gif', /home/blah/zope/Products/kupu/plone/__init__.py:31: DeprecationWarning: The product_name parameter of ToolInit is deprecated and will be ignored in CMF1.6: kupu icon=kupu_icon.gif, I finally made it to the ZMI, moved the folders from the untarred Plone tarball into the Products folder in the instance running in my home directory and restart the zope instance using runzope. I expect to see Plone Site in the drop down menu on the right but don't. I do a Plone Language Tool. Could you help me figure out why Plone Site won't show up. Thank you very much for your time. Qass On 12/14/05, Floyd May [EMAIL PROTECTED] wrote: First, I would recommend against changing anything in any file at this point except configuration files. Next, verify that the correct python version is being used. It's easy to have two pythons side-by-side on the same linux system. If you built Zope from source, you (probably) should build python from source as well. However, if you used an installable package for Zope, I would recommend staying with whatever version pairing of Zope/Python that your Linux distribution has by default. It's simpler that way, and will probably solve your problem. I know that I've built Zope before where it's pointed at the wrong python version, and got things all screwed up for me. Use `which python` -V (those are backtics) to figure out the version that your $PATH points to by default. If you *are* building from source, verify that you used --with-python=/path/to/python2.3.5 when you ran the configure script for Zope. The configure script should(?) tell you if there's a problem with any module dependencies. Again, if building Zope from source, it's probably best that you use a python built from source as well. Good Luck! fm On 12/14/05, Qass [EMAIL PROTECTED] wrote: Hi: I'm new to zope and yesterday installed zope 2.8.4 on a linux system running python 2.3.5 Having followed installation instructions I got to
Re: [Zope] Unauthorized exception when trying to access a list item
Cameron Beattie wrote: The list consists of something like this: [61282125371L, 1, 6, 0]. Are you _sure_ this is a plain python list? Looking at its format, and the apparently weird nature of your other questions, are you maybe abusing a relational database somewhere in this spider's web? ;-) Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] HTTP compressed response
Gabriel Genellina wrote at 2005-12-12 15:45 -0300:
...
def enableHTTPCompression(self,REQUEST={},force=0,disable=0,query=0):
and I think I should invoke it with REQUEST=REQUEST to enable compression
only when the client browser can handle it.
But I dont know WHEN to do the call - should it be in (every) template used
to generate a response?
You must call the method on any RESPONSE you want compression to be enabled.
Usually, you put it in a generally used template or macro
(e.g. main_template or standard_html_header, respectively).
--
Dieter
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] user account defined outside context of object being accessed
Kees de Brabander wrote at 2005-12-13 22:40 +0100: ... Module AccessControl.ImplPython, line 449, in validate Module AccessControl.ImplPython, line 774, in raiseVerbose Unauthorized: Your user account is defined outside the context of the object being accessed. Access to 'f1_index' of (Folder at /f1), acquired through (Folder at /f1/f11/f111), denied. Your user account, user1, exists at /f1/f11/acl_users. Access requires one of the following roles: ['Authenticated', 'Manager', 'Owner', 'student']. A user defined in /f1/f11/acl_users tries to access the protected /f1/f1_index. This is not allowed by Zope security system: a user defined in a user folder can only access protected objects governed by this user folder. In your case, all objects at or below /f1/f11 is governed by your user folder (/f1/f11/acl_users). /f1/f1_index does not lie within this hierarchy and is therefore not governed. -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] XML-RPC within ZOPE
Jan-Ole Esleben wrote at 2005-12-11 19:10 +0100: Is it at all impossible to use XML-RPC _within_ a ZOPE architecture? In principle yes. Be careful however: it is easy to introduce deadlocks! When during request processing you call back into the same Zope via XML-RPC, the calling out request will not complete until the XML-RPC returns a result (this always holds for calls, XML-RPC or other, to an external or internal server). Zope has a limited amount of workers (the default is 4) able to execute requests. If there are no free workers, requests have to wait for one. Now imagine that as many requests arrive as there are workers and each of them wants to perform an XML-RPC against the same Zope. Then you have a deadlock: none of the XML-RPC requests will finish, because there are no free workers. An no worker will ever become free again, because each of them waits for its XML-RPC to finish. Therefore, you should directly call internal resources (rather than use XML-RPC). -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: [ZODB-Dev] sessions in the presence of conflicts
Dennis Allison wrote at 2005-12-14 12:58 -0800: ... _p_resolveConflict(self, oldState, savedState, newState) returns the state of the object after resolving different changes. The arguments are: oldState -- state of the object at the beginning of the current transaction (mutable) savedState -- state currently stored in the database. This state was written after oldState and reflect changes made by a transaction that committed before the current transaction (immutable) newState -- state after changes made by the current transaction (immutable) ... It seems to me that we can do much better for sessions because we know a bit about the semantics of sessions. A session object is a dictionary-like object mapping key-value pairs. Adding or deleting keys or changing the value associated with a key are independent operations and do not conflict unless the keys are duplicated in both the transactions. Any conflict resolution mechanism needs to be able to manage multiple keys independently since the session object is modified as a unit. In addition, new keys may be added and old keys deleted; any conflict resolution mechanism at the key level needs to be comprehend those operations. A more session-friendly conflict resolution might use: 1. if any of the states are invalid (that is, has a key '_invalid') return the invalid state. 2. if any any of the states attributes ['token','id','_created'] differ then there is a conflict, raise the conflict exception. 3. order the newState and savedState by modification time (or if that cannot be computed, by access time). newState is always after savedState (saveState represents a formerly committed state, newState the current state the commit of which failed). 4. any key appearing in oldState's dictionary but not appearing in both savedState and newState should be removed from all. This corresponds to a key-value pair being deleted in one of the transactions. Insertions will be managed automatically by the updates. That looks doubtful: It means, if any of the transactions deletes the key, then it should be removed. You favour deletion a bit. 5. beginning with the oldest, update oldState dictionary of key-value pairs using the dictionary part of newState and savedState. Return oldState. ... -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
Jonathan wrote: Andreas wrote: My 2 cents: PythonScripts are restricted and are *not* thought to be a full replacement for Python modules. If you need this functionaltiy consider writing a Zope Product, using external methods or using TrustedExecutables. If python scripts are restricted from accessing zExceptions (for security reasons???) then why allow python scripts to trap zExceptions in bare try/excepts? If the logic for not allowing zExceptions in plain vanilla python scripts is for security reasons, then allowing bare try/excepts would seem to be a security hole (though, I don't see the rationale for this). I would imagine that not allowing these exceptions to be imported in trusted code is simply an oversight. The mechanism involved is not a you may not import this type of thing, but rather a you may import this statement. It is easy to miss safe but rarely used pieces. If you have a list of exceptions you would like to have available, go and file a bug report. A patch would be even better. --jcc -- Building Websites with Plone http://plonebook.packtpub.com/ Enfold Systems, LLC http://www.enfoldsystems.com ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] batching help
Nicolas Georgakopoulos wrote:
Dragos Chirila wrote:
Hi
I suggest to use the following function that
def get_grouped_list(self, seq=[], size=3):
#get the list with all items grouped
return [seq[i:i+size] for i in range(0, len(seq), size)]
that takes as parameter a list and goups items in slices with length =
size.
def get_grouped_list(seq=[], size=3):
... return [seq[i:i+size] for i in range(0, len(seq), size)]
...
l = [1,2,3,4,5,6,7,8]
get_grouped_list(l)
[[1, 2, 3], [4, 5, 6], [7, 8]]
get_grouped_list(l, 4)
[[1, 2, 3, 4], [5, 6, 7, 8]]
Then iterating this is something like:
tr tal:repeat=slice python:someobject.get_grouped_list(yourlist)
td tal:repeat=item slice
span tal:replace=item /
/td
/tr
Nicolas Georgakopoulos wrote:
Hello all , I'm trying to display on the same page a table with (3
columns) with content from a list . I'm trying to batch the results
so that every 3 elements anothe row is created.
Can anyone give me a clue how to do that ?
this is my code:
table tal:define=Rnumber
python:context.cm1.content.specialfile.getList('link_list') ; batch
python:modules['ZTUtils'].Batch(Rnumber,size=3,start=0)
th colspan=3Main Title/th
trthTitle 1/ththTitle 2/ththTitle 3/th/tr
tr
td tal:repeat=num batch
span tal:condition=python:num 3
tal:replace=structure num content goes here.. /span
/td
/tr !-- tr
td tal:repeat=num batch
span tal:replace=structure num
Material goes here /span
/td
/tr
-- /table
Thanks for your suggestion Dragos , I want to do it the zope batch way
(I suppose it is simpler) if I can...
I will keep in mind your function if nothing else can be done.
The ZTUtils batching is mostly for batching between pages. It's probably
easier to do it in a Python script.
--jcc
--
Building Websites with Plone
http://plonebook.packtpub.com/
Enfold Systems, LLC
http://www.enfoldsystems.com
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: [Zope-dev] user folder question
redirecting this to the normal zope list where it makes more sense, please continue there On 15 Dec 2005, at 16:58, Chris Cole wrote: Hey all, I'm currently trying to setup a custom zope instance for our c.s. department at school. Currently we run a totally linux infrastructure with ldap authentication which we would also like to tie into zope. My question is not how to authenticate against ldap, but I was wondering if there is a way to disable the default user folder and in automagically put an ldapuser folder in its place on creation of a new instance. I'm kinda new to zope, and I'm sure it's possible, but if someone could at least point me in the right direction i would appreciate it. If you're talking about instance as in installing a Zope $INSTANCE_HOME, then you could prepare a ZODB where you have done all that manually and re-use that for every instance you build out. If you run ZEO and they all connect to the same database there is no need - you switch it out once and all instances see that. jens ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Re: [Zope-dev] user folder question
On 15 Dec 2005, at 16:58, Chris Cole wrote: I'm currently trying to setup a custom zope instance for our c.s. department at school. Currently we run a totally linux infrastructure with ldap authentication which we would also like to tie into zope. My question is not how to authenticate against ldap, but I was wondering if there is a way to disable the default user folder and in automagically put an ldapuser folder in its place on creation of a new instance. I'm kinda new to zope, and I'm sure it's possible, but if someone could at least point me in the right direction i would appreciate it. If you do replace the top user folder with one that depends on an outside source, you better learn how to use the Emergency User. Because you will at some point mis-configure the LDAPUserFolder and lock yourself out. --jcc -- Building Websites with Plone http://plonebook.packtpub.com/ Enfold Systems, LLC http://www.enfoldsystems.com ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: Zope 2.8.4+Latest cygwin installation
I have no idea what the original symptom or situation was, so I can't really comment. I'll note, however, that the error refered to in Pascal's reply results from a wart in Python's type-definition protocols that I thought I had fixed, but maybe I proposed fixing it and didn't get around to it. :( More specific would be helpful. Is a custom C type involved here? Jim Tres Seaver wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Pascal Peregrina wrote: Ok, in case anyone is interested, this nasty code change made it : In Zope-2.8.4-final/lib/python/ZODB/serialize.py: Change : return klass.__new__(klass, *args) To : try: result=klass.__new__(klass, *args) except TypeError: result=Persistent.__new__(klass, *args) return result I think Jim is the only one who could explain what you see. I can't even find the place in the code which generates that error: $ find . -name *.py -o -name *.c | xargs grep is not safe ./RestrictedPython/RCompile.py:The UNPACK_SEQUENCE opcode is not safe because it extracts ./zope/security/untrustedpython/builtins.py:# It's better to say what is safe than it say what is not safe ./ZODB/tests/testmvcc.py:It is not safe, however, to read the current revision of a because $ Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:51 À : [EMAIL PROTECTED] Objet : RE: [Zope] Zope 2.8.4+Latest cygwin installation Ok, just found it has already been reported several months ago, even with python 2.3.x: http://www.zope.org/Collectors/Zope/1725 Does someone know of any kind of temporary workaround for this ? Thanks ! Pascal -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Pascal Peregrina Envoyé : jeudi 15 décembre 2005 12:25 À : [EMAIL PROTECTED] Objet : [Zope] Zope 2.8.4+Latest cygwin installation Hi, I would like to know if anyone has been able to compile and run Zope 2.8.4 with Cygwin. I just installed cygwin with latest stable packages. I compiled python 2.4.2 (I know, not the supported version, so I am about to try 2.3.5 now) I had issues with the socket module, and from google I applied a workaround that worked fine : in Modules/socketmodule.c Change : #if defined(__sgi) !defined(INET_ADDRSTRLEN) #define INET_ADDRSTRLEN 16 #endif To : /*#if defined(__sgi) !defined(INET_ADDRSTRLEN)*/ #define INET_ADDRSTRLEN 16 /*#endif*/ I made several python tests and all looks fine. Then I compiled Zope 2.8.4 without any issue. But when I run it, I get this error: Site Error An error was encountered while publishing this resource. exceptions.TypeError Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 187, in publish_module_standard Module Products.Localizer, line 58, in new_publish Module ZPublisher.Publish, line 144, in publish Module Zope2.App.startup, line 174, in zpublisher_exception_hook Module App.ZApplication, line 60, in __bobo_traverse__ Module UserDict, line 17, in __getitem__ Module ZODB.Connection, line 704, in setstate Module ZODB.Connection, line 760, in _setstate Module ZODB.serialize, line 495, in setGhostState Module ZODB.serialize, line 488, in getState Module ZODB.serialize, line 436, in _persistent_load Module ZODB.Connection, line 208, in get Module ZODB.serialize, line 482, in getGhost TypeError: Acquirer.__new__(Application) is not safe, use Persistence.Persistent.__new__() Does anyone know what I can do ? Thanks a lot. - -- === Tres Seaver +1 202-558-7113 [EMAIL PROTECTED] Palladion Software Excellence by Designhttp://palladion.com -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDoX+I+gerLs4ltQ4RAnnCAJ93gKFJn8j/BPXK91RuuTMutLzrHACgtB56 NH2tqYHS/JPITSoVefuqkRU= =CCbu -END PGP SIGNATURE- -- Jim Fulton mailto:[EMAIL PROTECTED] Python Powered! CTO (540) 361-1714http://www.python.org Zope Corporation http://www.zope.com http://www.zope.org ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] à l'aide
bonjourje suis un débutant. je veux installer zope sur la debian. mais j'ai remarqué un repertoire /usr/lib/zope. j'ai donc conclu que zope a été installé avec mon system debian. maintenant comment faire pour démarer zope. dois-je faire un start et où? merci Nouveau : téléphonez moins cher avec Yahoo! Messenger ! Découvez les tarifs exceptionnels pour appeler la France et l'international. Téléchargez la version beta.___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] user folder question
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hey all, I'm currently trying to setup a custom zope instance for our c.s. department at school. Currently we run a totally linux infrastructure with ldap authentication which we would also like to tie into zope. My question is not how to authenticate against ldap, but I was wondering if there is a way to disable the default user folder and in automagically put an ldapuser folder in its place on creation of a new instance. I'm kinda new to zope, and I'm sure it's possible, but if someone could at least point me in the right direction i would appreciate it. - --Chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDob1SASJ6G3eRc6ARAsY6AJ0Zt52lG+zsg10QlCGB3lq3SUCswQCgu3S1 lmDaYgZV2/MgPz7foC1EaJc= =5/ig -END PGP SIGNATURE- ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] user account defined outside context of object being accessed
- Original Message - From: Chris Withers [EMAIL PROTECTED] To: Kees de Brabander [EMAIL PROTECTED] Cc: zope@zope.org Sent: Thursday, December 15, 2005 4:24 PM Subject: Re: [Zope] user account defined outside context of object being accessed Kees de Brabander wrote: Unauthorized: Your user account is defined outside the context of the object being accessed. Access to 'f1_index' of (Folder at /f1), acquired through (Folder at /f1/f11/f111), denied. Your user account, user1, exists at /f1/f11/acl_users. Access requires one of the following roles: ['Authenticated', 'Manager', 'Owner', 'student']. Looks like you were inadvertantly taking advantage of a security hole in Zope that got plugged. That said, your example was extremely complicated. Well, that's life ;) Can you come up with as simple an example as possible so that we can maybe help you out? I can't make the example more simple than I did. I guess it boils down to the fact that a user defined in a user folder somewhere farther down along a path cannot acquire objects higher up that path when the acquisition of the view permission of that object or its container is disabled and the view permission granted again to specific roles. This was possible up to zope version 2.7.3, but not anymore from 2.7.8. Somewhere in between this was changed, but I could not find an explicit reference. I used this construction a lot of times, so I have to restructure several applications. I guess that's life as well. Thanks anyway, cb ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] à l'aide
Am Donnerstag, den 15.12.2005, 19:58 +0100 schrieb adeline nombre: bonjour je suis un débutant. je veux installer zope sur la debian. mais j'ai remarqué un repertoire /usr/lib/zope. j'ai donc conclu que zope a été installé avec mon system debian. maintenant comment faire pour démarer zope. dois-je faire un start et où? Even on debian its recommended to install zope from source. It isnt all that hard. You need python2.3.5 or higher and also -dev libs of it. If you run stable your python might be too far back and you either install a backport or python from source - dont forget zlib1g-dev and zlib1g in this case. From testing upwards, apt-get install python2.3 python2.3-dev is enough. Unpack the tar file from zope.org and follow instructions in doc/INSTALL.txt there. You dont need to be root to compile and install zope. HTH Tino PS: lingua franca here is english language ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] à l'aide
Tino Wildenhain wrote: Am Donnerstag, den 15.12.2005, 19:58 +0100 schrieb adeline nombre: bonjour je suis un débutant. je veux installer zope sur la debian. mais j'ai remarqué un repertoire /usr/lib/zope. j'ai donc conclu que zope a été installé avec mon system debian. maintenant comment faire pour démarer zope. dois-je faire un start et où? Even on debian its recommended to install zope from source. FWIW, did you try to install zope on debian lately? You would have noticed that it's not all that bad... Igor ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] à l'aide
Am Donnerstag, den 15.12.2005, 21:17 +0100 schrieb Igor Stroh: Tino Wildenhain wrote: Am Donnerstag, den 15.12.2005, 19:58 +0100 schrieb adeline nombre: bonjour je suis un débutant. je veux installer zope sur la debian. mais j'ai remarqué un repertoire /usr/lib/zope. j'ai donc conclu que zope a été installé avec mon system debian. maintenant comment faire pour démarer zope. dois-je faire un start et où? Even on debian its recommended to install zope from source. FWIW, did you try to install zope on debian lately? You would have noticed that it's not all that bad... Well, we are happy to have a stable python platform with debian :-) The little zope compiling does not hurt. It has gotten much better, thats true. ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
Andreas Jung wrote: --On 14. Dezember 2005 12:54:56 -0700 Nikko Wolf [EMAIL PROTECTED] wrote: So you could try this instead: for item in itemList: try: context.afolder.manage_delObjects([item]) except: continue Wa... DON'T DO THAT. You should *never* use bare try..excepts within Zope applications. This can lead to strange and unpredictable behavior. Can you elaborate on what strange and unpredictable behavior you mean? I'm curious in general, but especially w.r.t. the code above? BTW, a simple grep of sources in Zope (2.7.6-final) turns up 600+ places where a bare except is used, and my Zope instance (which uses Plone) contains over 350 more. Cheers, Nikko ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Trapping zope exceptions in python script
On Dec 15, 2005, at 4:01 PM, Nikko Wolf wrote: Can you elaborate on what strange and unpredictable behavior you mean? I'm curious in general, but especially w.r.t. the code above? BTW, a simple grep of sources in Zope (2.7.6-final) turns up 600+ places where a bare except is used, and my Zope instance (which uses Plone) contains over 350 more. Often when you see a bare except, it is after some of the specific important exceptions are caught and re-raised: try: something() except ConflictError: raise except: recover() Even this is pretty poor style anyway (If you don't know enough about what is going wrong to know what is being thrown, you probably shouldn't be in charge of recovering from it.) The problem with catching and swallowing ConflictError and similar internal Zope errors is that you leave your ZODB in an inconsistent state. Roughly, one request has started making modifications to the ZODB, then a second request has been making modifications to the same object. The ZODB has noticed this, and throws this ConflictError exception. It is expecting this exception to bubble up all the way out of your code, throwing away whatever potential modifications you have made to the ZODB and having Zope try your code again. (at that point, hopefully the task that didn't get the conflict error has completed and committed its changes. When your code is run again, it will see the new values from the other transaction. Here an (again very rough) example: Imagine that you have two collections of objects called unprocessed and processed. A group of somethings or someones grab the next item in unprocessed, and puts it into processed. If two requests come in to grab the next item from unprocessed and put it one of the other buckets, at some point. one or both of them will get the ConflictError exception. If the exception is swallowed by the code both of them will save their copy of the object in processed, and where you had one object before you now have two. If these objects were student quizzes, two copies of the same quiz will double the weight of the score. If these object were loan application, the amount of money you were paying out has doubled. All around bad news. ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: Triggering the persistence mechanism
There is nothing that needs to be done here. It's only if you *mutate* values stored in the session that you need to do explicit persistence triggering. I provided an example of doing this in my last email. - C On Dec 15, 2005, at 4:20 PM, Dennis Allison wrote: Chris McDonnough pointed out a problem with my setSessionVariable code which I am now fixing. I want a generic routine to set a session variable whether it is a simple variable, a list, or a dictionary. The question is one of triggering the persistence mechanism. If a dictionary or list is stored in a session variable, what is needed to ensure that the setSessionVariable() routine triggers the persistence mechanism? Is it adequate to simply read the session variable in the setSessionVariable() routine prior to writing it when the session variable is a dictionary or list? Or is something else needed? ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: Triggering the persistence mechanism
Yes, I understand that. This is a development and code organization issue. From the developer's point-of-view there is a special namespace called session variables. What I want to be able to do is have the coders call getSessionVariable(name) to get the current value of the session variable and setSessionVariable(name, value) to save the value. The type of the variable should be transparent to the programmer--that is, it could be a number, a string, a dictionary, or a list. My question restated: Is there a way to write a generic setSessionVariable()routine that handles the mutated values properly for arbitrary types. That is, does something like def setSessionVariable( name, value ): request = container.REQUEST session = request.session a = session.get(name,0) a = value session[name]=a manage persistence correctly if value is a dictionary or a list and mutated from the old value, whatever it may have been. Or is it necessary to specifically include an assignment for each mutated component of the dictionary or list? What happens when the value to be stored is a dictionary of dictionaries of lists and has been mutated? Is there an advantage to using the persistent Dictionary and List classes in the session rather than ordinary ones? Thanks again for your insight. On Thu, 15 Dec 2005, Chris McDonough wrote: There is nothing that needs to be done here. It's only if you *mutate* values stored in the session that you need to do explicit persistence triggering. I provided an example of doing this in my last email. - C On Dec 15, 2005, at 4:20 PM, Dennis Allison wrote: Chris McDonnough pointed out a problem with my setSessionVariable code which I am now fixing. I want a generic routine to set a session variable whether it is a simple variable, a list, or a dictionary. The question is one of triggering the persistence mechanism. If a dictionary or list is stored in a session variable, what is needed to ensure that the setSessionVariable() routine triggers the persistence mechanism? Is it adequate to simply read the session variable in the setSessionVariable() routine prior to writing it when the session variable is a dictionary or list? Or is something else needed? -- ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] Re: Triggering the persistence mechanism
session variables. What I want to be able to do is have the coders
call
getSessionVariable(name)
to get the current value of the session variable and
setSessionVariable(name, value)
to save the value. The type of the variable should be transparent
to the
programmer--that is, it could be a number, a string, a dictionary,
or a
list.
The two functions you describe are all that you need.
My question restated: Is there a way to write a generic
setSessionVariable()routine that handles the mutated values properly
for arbitrary types.
The simplest implementations are sufficient:
def getSessionVariable(name):
return context.request.SESSION[name]
def setSessionVariable(name, value):
context.request.SESSION[name] = value
Where this behaves in an unexpected manner is if someone stores a
mutable value in the session, e.g.:
setSessionVariable('a', {})
and *later in the same request* does something like this *without
ever again calling setSessionVariable*:
a = getSessionVariable('a')
a['foo'] = 'bar'
The programmer has mutated the dictionary, which is a basic type, and
thus doesn't know anything about persistence. Since it's mutated,
and its value isn't stored back into the session explicitly, it will
eventually disappear when the session data object is ghosted.
The best (and only) way to prevent this is to instruct your
developers to always explicitly re-persist session variables after
they mutate them:
a = getSessionVariable('a')
a['foo'] = 'bar'
setSessionVariable('a', a)
There is no sane mechanism to prevent them from needing to do this
for mutable basic types.
and mutated from the old value, whatever it may have been. Or is it
necessary to specifically include an assignment for each mutated
component of the dictionary or list?
It is not necessary to do this for each value in the dictionary or
list. Just for the dictionary or list itself.
What happens when the value to be stored is a dictionary of
dictionaries
of lists and has been mutated?
The mutations are lost unless you call setSessionVariable on the top-
level dictionary.
Is there an advantage to using the persistent Dictionary and List
classes
in the session rather than ordinary ones?
They avoid the requirement that you think about this, as they are not
basic types and thus know about persistence and can manage this for you.
Thanks again for your insight.
- C
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
[Zope] ANN: ZSyncer 0.7.0 released
ZSyncer 0.7.0 Released Version 0.7.0-final (2005/12/15) is available for download from sourceforge: http://sourceforge.net/project/showfiles.php?group_id=28073package_id=20913release_id=378551 ZSyncer is a Zope 2 product that allows you to synchronize and compare objects from one zope (source) to another (destination). It is a lot more convenient than the old manual export / transfer / import procedure. Noteworthy changes since 0.6.2: Features added: * We now have two-directional sync! Instead of just sync, we now have both put (like the old sync) and get (pulls changes from the remote system to the client system). Thanks Alan Milligan! * new method of ZSyncer and ZSyncerTool: callManyRemote() to call multiple arbitrary methods on the remote system and return a list of results. * Pretty complete example skins for ZSyncerTool integration with CMF/Plone. See README.txt for more instructions. Doesn't have all features yet (e.g. no pull support). * Should work with Zope 2.8 now! * The override user stuff is removed from the UI. You now have to use the proto://user:[EMAIL PROTECTED] url format. See README.txt for more information. * The (broken) XMLRPC code has been removed. * New config variable, upload_threshold_kbytes, determines the point at which the server spools data to a temp file instead of RAM. * delete now deletes from both local and remote systems. * SSL connections using ConnectionMgr should now set timeout properly. * Lots of unit tests! For bugfixes and older changes, see CHANGES.txt. -- Paul Winkler http://www.slinkp.com ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
