[Catalyst] Newbie help

Wade Stuart wbs at grepit.net
Thu Jan 15 23:33:02 GMT 2009

On Wed, Jan 14, 2009 at 7:14 PM, Toby Corkindale <
toby.corkindale at strategicdata.com.au> wrote:

> Diego M. Vadell wrote:
>> Hi everybody,
>>   I'm making a nice little webapp in Catalyst: metheorology models run v=
>> crontab and catalyst shows the data and graphs that they produce. Im very
>> happy how it's working so far.
>>   Now I have been asked if I could make a "Run the model now" button, th=
>> would run a script (the model) and show it's output in a popup window.
>>   The process may run for about 15 minutes, so I have to handle , someho=
>> the browser timing out because of lack of output. I thought about making=
>> script output to a tmp file and using ajax to query that file.
>>   What is the best way to do that? Is there a nice, magical CPAN module
>> out there? :)
> You don't really need one..
> Simplest way to handle this would be for the web page to kick off the mod=
> running in another process, and then immediately display a web page that
> says "Please wait, model running.."

> That page then either uses javascript or a http-refresh mechanism to check
> back every 30 seconds to see if the model is ready yet.

Seconded.  This is a very easy way to accomplish this task.  If you need
further control (stopping jobs, viewing status % done, etc) I would build or
use one of the many queue managers out there (
http://search.cpan.org/search?query=3Djob+queue&mode=3Dall ) outside of you=
that updates your database and accepts commands via your app and database.

Either way this really should be done outside of the webapp.

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