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

[Clark O'Brien]

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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