[Zope] ZODB.POSException.ConflictError (in custommade product)

[Gitte Wange]

At 23:14 26-10-2003, you wrote:
>At 18:34 26-10-2003, Dieter Maurer wrote:
>>Gitte Wange wrote at 2003-10-26 11:25 +0100:
>>  > At 11:03 26-10-2003, Dieter Maurer wrote:
>>  > >Gitte Wange wrote at 2003-10-25 13:39 +0200:
>>  > >  > I have created a small tool for CMF to count how many times a 
>> specific
>>  > >  > object has been viewed.
>>  > >  > ...
>>  > >  > Now from time to time we see the following error:
>>  > >  > ZODB.POSException.ConflictError
>>  > >
>>  > >
>>  > >When you put counters in the ZODB, you should use
>>  > >"BTrees.Length" instances. They are small persistent objects with
>>  > >conflict resolution (no ZODB write conflicts) and "independence"
>>  > >(no ZODB read conflicts).
>>  >
>>  > Arh ...
>>  > At this moment I just have a dictionary with URL as key and count as 
>> value.
>>  > count is a simple integer.
>>  > So instead I should save value as an instance of BTrees.Length() ?
>>  > Or just I make something else than a dictionary ?
>>
>>If your counter is maintained in the ZODB, the counter should
>>be a "BTrees.Length" instance. Otherwise, you can use whatever
>>data structure seems best for you.
>
>Sorry Dieter if I'm slow on this but I just don't get it ...
>At this moment I have a dictionary looking like this:
>views = {'http://mypage.com/frontpage': 10, 'http://mypage.com/article2': 3}
>This get's saved into ZODB and - as I understand - causes the ConflictErrors ?
>
>Instead I should use some sort of BTrees.Length object ... and then my 
>question is:
>Should the dictionary look like this instead:
>views = {'http://mypage.com/frontpage': BTrees.Length(10), 
>'http://mypage.com/article2': BTrees.Length(3)}
>??
>Or is it the entire dictionary that should be some kind of BTrees.Length() ??

No one with a hint on this ??

Greetings,
Gitte Wange