[Zope-dev] FW: Zope & optimistic transactions.

[seb bacon]

Dude, it's not a bug.  You're *meant* to get a ConflictError exception 
when writes conflict.  That signals the publisher to retry.

Search on zope.org for "conflict resolution".

Regards,

seb

* Clark O'Brien <clark_obrien@yahoo.com> [011130 18:05]:
> That was not the point dude. Your cowardly call for a 
> response from the intellectual prostitutes on this
> list leaves me uninterested in anything you may have
> to say.
>        Over and Out 
>               Clark
> 
> 
> 
> 
> --- Chris McDonough <chrism@zope.com> wrote:
> > There won't be any more discussion about this issue
> > from me.
> > 
> > - C
> > 
> > 
> > ----- Original Message -----
> > From: "Clark OBrien"
> > <COBrien@isis-server.vuse.vanderbilt.edu>
> > To: <zope-dev@zope.org>
> > Sent: Friday, November 30, 2001 12:48 PM
> > Subject: [Zope-dev] FW: Zope & optimistic
> > transactions.
> > 
> > 
> > >
> > >
> > > >  -----Original Message-----
> > > > From: Clark OBrien
> > > > Sent: Monday, November 05, 2001 7:14 AM
> > > > To: 'chrism@zope.com'; 'k_vertigo@yahoo.com'
> > > > Cc: 'zope@zope.org'
> > > > Subject: Zope & optimistic transactions.
> > > >
> > > >
> > > > Chris,
> > > > I set up a test harness to exercise zopes
> > optimistic transaction
> > > > management.
> > > > My test immediatly caused a ZODB exception.
> > > >
> > > > I am running zope 2.42. on win 2k, the scripts
> > are attached.
> > > > Results below:
> > > >
> > > > As you recall I posed the following question:
> > > >
> > > > What if you had a directory structure like:
> > > > Folder1
> > > >     Folder-2
> > > >        Folder-3
> > > >           ...
> > > >             ..
> > > >                 Folder-n
> > > > Each folder had an attribute foo and there were
> > two scripts,
> > script1 and
> > > > script2.
> > > > script1 modified foo on one Folder only while
> > script2 traversed
> > all the
> > > > folders modifying the attribute foo on each one
> > of them.
> > > > Would the script2 ever commit while the fist
> > while script1 was
> > > > continuously called. This is interesting because
> > a call to
> > script2 would
> > > > never finish before several calls to  script1
> > finished.
> > > >
> > > > I set up a simple test with only 10 folders. I
> > then wrote the
> > script below
> > > > changeLevel2 that is my scri1 above and
> > changeFolders that is my
> > script2
> > > > above.
> > > > I ran changeLevel2 in a loop using the following
> > code:
> > >
> > >
> >
> ----------------------------------------script----------------------
> > ------
> > > > -------------------
> > > > import urllib
> > > > params = urllib.urlencode({'theText': 'Vitamin
> > D'})
> > > > while 1:
> > > >  f =
> >
> urllib.urlopen("http://localhost:8080/Test/changeLevel2?%s"
> > %
> > params)
> > > >  print f.read()
> > >
> > >
> >
> -----------------------------------------script---------------------
> > ------
> > > > ---------------------
> > > >
> > > >
> > > > I then ran the script changeFolders from my
> > browsers.
> > > > The result was the following error message:
> > > >
> > > >
> >
> ------------------------------------------------------------
> > > > ZODB.POSException.ConflictError
> > > >
> > > > Sorry, a site error occurred.
> > > >
> > > > Traceback (innermost last):
> > > >   File C:zopelibpythonZPublisherPublish.py,
> > line 223, in
> > > > publish_module
> > > >   File C:zopelibpythonZPublisherPublish.py,
> > line 200, in
> > publish
> > > >   File C:zopelibpythonZPublisherPublish.py,
> > line 200, in
> > publish
> > > >   File C:zopelibpythonZPublisherPublish.py,
> > line 200, in
> > publish
> > > >   File C:zopelibpythonZPublisherPublish.py,
> > line 195, in
> > publish
> > > >
> >
> ----------------------------------------------------------
> > > >
> > > >
> > > >
> > > >  <<scripts.txt>>
> > >
> > 
> > 
> > _______________________________________________
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        seb bacon
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