[users@httpd] handler lifecycle

["jalil@securia.com" <ja...@securia.com>]

I am new to Apache and am using mod_python. I appreciate any help with 
the following questions:

1. How does Apache load/unload handlers when multiple requests arrvie. I 
have read that a process is created for every request. So, does Apache 
create a process (or is it a thread?) and then calls to the handler each 
time a request comes in?

2. Anyway to keep some state around b/w calls to a handler? For example, 
how one can keep a pool of database connections for an application 
written in mod_python or mod_perl or any other similar modules?

Thanks,

-Jalil



---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
   "   from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org

Re: [users@httpd] handler lifecycle

[Nick Kew <ni...@webthing.com>]

On Tue, 30 Dec 2003, jalil@securia.com wrote:

> 1. How does Apache load/unload handlers when multiple requests arrvie. I
> have read that a process is created for every request.

No.  Only under very specific circumstances (CGI running under
mod_cgi, or a filter running under mod_ext_filter).

> 2. Anyway to keep some state around b/w calls to a handler? For example,
> how one can keep a pool of database connections for an application
> written in mod_python or mod_perl or any other similar modules?

You can keep a pool of database connections - and even share it
over different applications if they happen to share a database.
Simple implementations for two popular databases are mod_pg_pool
and mod_mysql_pool at <URL:http://apache.webthing.com/>.

As for mod_perl or mod_python bindings, I'd like to see them
but they don't currently exist - unless someone's keeping it
secret.

-- 
Nick Kew


---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
   "   from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org