[Catalyst] working around request timeouts

[Chakkit Ngamsom]

Hi James,

Have you try RunAfterRequest Plugin?

http://search.cpan.org/~flora/Catalyst-Plugin-RunAfterRequest-0.04/lib/Catalyst/Plugin/RunAfterRequest.pm

Regards,
Chakkit

On Aug 21, 2012, at 12:07 AM, "James R. Leu" <jleu at mindspring.com> wrote:

> Hello all,
> 
> Problem description
> ===================
> I have a catalyst application server that responds
> to 'API' requests for web applications via XHTMLRequests.
> Sometimes the requests are timing out due to the backend
> database queries taking too long.  I'm looking for ways to
> work around this and prevent the 'API' requests from
> timing out.
> 
> I know some of the possible resolutions to this are
> - fix the queries
> - fix the database
> - frontend the RDBMS with NoSQL
> 
> I'm working towards those fixes, but they are long
> term projects, I'm looking for an interim solution.
> That would notify the web application that it will
> need to come back later for the response (ie decouple
> request handling from the actual request/response).
> 
> My attempt
> ==========
> In my handler I fork a child process.
> 
> In the parent I send a response with a
> 'job id' so the web application knows
> to poll the 'API' for completion.
> 
> In the child I close the IO socket so it cannot send
> a response and then let it finish processing the
> request, but it looks like I've lost my database
> connections so the request fails.
> 
> My wish
> =======
> What I would like to do is avoid the fork and instead
> have the handler send an early response to the
> web application and then finish processing the request
> and not try to send a response when done.
> 
> Is there a common term for what I'm trying to do
> like continuation or something like that?
> Has anyone already done this?
> 
> Thank you for your time.
> -- 
> James R. Leu
> jleu at mindspring.com
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