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Posted to modules-dev@httpd.apache.org by John Zhang <jo...@yahoo.com> on 2007/10/31 21:41:59 UTC
Where is the right place to setup a connection pool?
I am writing a module talking to a remote server that
handles the real work. I need to build/keep a pool of
connections for reuse almong the different Apache
worker threads. Should I build that in the
ap_hook_post_config or ap_hook_child_init function?
When apache creates multiple processes, will each
process have its own copy of the connection pool
automatically (taken care by apache) or I will have to
do more work?
Thanks in advance for any help.
John
Re: Where is the right place to setup a connection pool?
Posted by Nick Kew <ni...@webthing.com>.
On Wed, 31 Oct 2007 13:41:59 -0700 (PDT)
John Zhang <jo...@yahoo.com> wrote:
> I am writing a module talking to a remote server that
> handles the real work. I need to build/keep a pool of
> connections for reuse almong the different Apache
> worker threads.
Further to my previous reply ...
What you wrote sounds broadly proxy-like. Maybe all you
need to write is a protocol provider module for mod_proxy,
and leave mod_proxy to take care of connection pooling?
mod_proxy already supports applications protocols
(mod_proxy_ajp, mod_proxy_fcgi) in addition to the more
traditional proxy protocols (mod_proxy_http, mod_proxy_ftp).
--
Nick Kew
Application Development with Apache - the Apache Modules Book
http://www.apachetutor.org/
Re: Where is the right place to setup a connection pool?
Posted by John Zhang <jo...@yahoo.com>.
Thanks Nick!
I am actually reading your book. Will your
example on Thread Safety (4.5.1) work (setup the pool
in init_child hook with thread mutex)? I do not need
a global mutex, right? I have not read the late
chapters yet.
With Regards,
John
--- Nick Kew <ni...@webthing.com> wrote:
> On Wed, 31 Oct 2007 13:41:59 -0700 (PDT)
> John Zhang <jo...@yahoo.com> wrote:
>
> > Thanks in advance for any help.
>
> Use an apr_reslist to manage the pool.
> See mod_dbd for an example.
>
> --
> Nick Kew
>
> Application Development with Apache - the Apache
> Modules Book
> http://www.apachetutor.org/
>
Re: Where is the right place to setup a connection pool?
Posted by Nick Kew <ni...@webthing.com>.
On Wed, 31 Oct 2007 13:41:59 -0700 (PDT)
John Zhang <jo...@yahoo.com> wrote:
> Thanks in advance for any help.
Use an apr_reslist to manage the pool.
See mod_dbd for an example.
--
Nick Kew
Application Development with Apache - the Apache Modules Book
http://www.apachetutor.org/