[Zope-dev] Question about _v_ attributes and database connections

[Peter Sabaini]

Marco Bizzarri wrote:
> Hi all.
> 
> We're trying to tackle a problem in hanging connections in ZPsycopg.
> However, I would like to have some information about the functioning of
> the _v_ attributes, and the cache management. In particular:
> 
> 1) where is the code which handles the _v_ attributes (I like to look at
> the source code, you know ;))
 >
> 2) where is the code which handles the caching of the objects?
> 
> 3) is it possible to disable caching of some object?
> 
> 4) when an _v_ attribute is removed, what code of the object/attribute
> itself is called?

I'm not sure which caching you mean -- _v_ variables aren't cached afaik.

Theres plenty source code to look at, for example 
lib/python/ZODB/cPersistence.c -- there is some special handling of _v_ 
attributes there.

Search for the Per__getstate__, ghostify / unghostify functions


> If possible, please answer also directly to me (I'm not on this list).
> 
> Regards
> Marco
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Zope-Dev maillist  -  Zope-Dev at zope.org
> http://mail.zope.org/mailman/listinfo/zope-dev
> **  No cross posts or HTML encoding!  **
> (Related lists - 
>  http://mail.zope.org/mailman/listinfo/zope-announce
>  http://mail.zope.org/mailman/listinfo/zope )
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3461 bytes
Desc: S/MIME Cryptographic Signature
Url : http://mail.zope.org/pipermail/zope-dev/attachments/20040305/493e0994/smime-0001.bin