[Zope-DB] Zope database connectivity

Matthew T. Kromer matt at bane.mi.org
Thu Jul 13 07:43:10 EDT 2006

Basically, no.

You could recode DA's to close the connection at the end of every  
transaction and reopen them on demand, but to the best of my  
knowledge none of the DAs work that way.

Once a connection object opens its connection it stays open but in  
the object cache of that thread.  This gives it both an indeterminate  
lifespan and a fair amount of isolation from other threads -- sadly,  
the thread that you're running your ZMI transaction on.  The ZMI cant  
"see" what objects the other threads are using (well you actually CAN  
program that but -- dont! -- you'd most likely break Zope in a severe  
way without intending to)

Most of the open buttons on database connections are pretty useless  
-- they just make the connection open early.  Most DA's open a  
connection on demand.  For "Most" read "all" because I don't know of  
one that DOESNT work that way.

On Jul 13, 2006, at 4:41 AM, Jose Carlos Balderas Alberico wrote:

> Greetings. I'm having a problem with database connectors, and maybe  
> you can give me a hand.
> Is there a way to manage the opening and closing of database  
> connectors, apart from doing it from the zope management interface?
> By this I mean, I want to implement a Python script that checks  
> wether a database connection is open or closed. If it's closed,  
> I'll open it, all coded, without having to click the "Open  
> connection" button.
> I haven't found info on this. Can you help me out with this?
> Thank you very much in advance.
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