From: Ollivier Robert <roberto@...>
Date: 2003-01-23T19:03:38+09:00
Subject: Re: mod_ruby: what's persistent and what's shared?

[courtesy cc of this posting sent to cited author via email]

In article <018b01c2c280$4634c0e0$fd01a8c0@musicbox>,
Bill Kelly <billk@cts.com> wrote:
> You have to be aware of persistence because global variables do
> persist in the Ruby interpreter running in a given httpd child
> process.
> 
> But, you can't depend on persistence, because the multiple (forked)
> httpd processes that might service your request are all separate.
> [Each has its "own" persistence.]

Imagine you do something like this in your httpd.conf

-=-=-
RubyRequire common-data
-=-=-

and that in common-data.rb you have this:

-=-=-
require 'dbi'

$DB = DBI.connect("dbi:mysql:foodb", "user", "password")
-=-=-

Will all instances of httpd share the same $DB ? Remember that it is not
data created by a script or a .rhtml page, it is data created when you
start the httpd server...
-- 
Ollivier ROBERT   -=- Eurocontrol EEC/ITM -=-   roberto@eurocontrol.fr
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