[Zope] How to prevent concurrent access to the same object?

[Richard Barrett]

At 10:15 06/02/2002 +0500, Alexei Ustyuzhaninov wrote:
>Hi!
>
>Is it possible to make a zope object which doesn't allow simultaneous 
>access to itself? I mean that if two users call methods of the same object 
>then only one call will process at a time and the other one will wait 
>untill the first call will finish. I tried to fix it up with unix 
>semaphores but with no success.

Why do you want to do this so explicitly?

I believe that Zope is inherently transactional and its own database 
updates are performed atomically with transaction commit, abort, rollback 
and retry apparatus built in.

That said, you might want to ask how to plug in your own commit, rollback 
and retry code to zope's transaction commit and abort handlers if you 
problem is to control updating of some external database from zope code.

>--
>Alexei
>
>
>
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