[Zope] Trying to trap ConflictError

[David H]

Jonathan wrote:

>
> ----- Original Message ----- From: <dieter at handshake.de>
> To: "Jonathan" <dev101 at magma.ca>
> Cc: "Dennis Allison" <allison at shasta.stanford.edu>; <zope at zope.org>
> Sent: Wednesday, July 05, 2006 2:28 PM
> Subject: Re: [Zope] Trying to trap ConflictError
>
>
>> Jonathan wrote at 2006-7-4 13:46 -0400:
>>
>>> ...
>>> The image objects stored in
>>> TemporaryStorage are never overwritten, edited etc (which is causing 
>>> me some
>>> confusion as to why the conflict errors are occurring)
>>
>>
>> The error message tells your that the conflict is not caused by
>> the modification of the image but the container holding your image.
>>
>> "BTreeFolder" already do conflict resolution -- and reduce the
>> conflict probability by about a factor of 30 to 100 (depending on type).
>>
>> However, if several threads should try to add elements with the same
>> id, then the conflict resolution cannot work.
>> Maybe, that happens in your case?
>
>
> The id for the image object is generated by the following code:
>
> def MakeId():
>   time.sleep(.01)
>   ts = string.replace(str(time.time()),'.', '')   # remove floating 
> point '.' char
>   return ts[-10:]
>
> So there should not be any collision of ids.
>
> I am still investing, and have found errors like:
>
Jonathan,

I wouldn't feel safe with that.  Why not append a few random digits just 
to be safe?

David