Running as a Process or otherwise

micro_learner
micro_learner used Ask the Experts™
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I have a Social Networking website built using Drupal .I need to have a utility application built that will use Webservices for Currency convertors on the web.Apart from converting the currency we do other fancy stuff on our side.

I want this utility app. to exist on its own ..not be a part of drupal so that it can exist independently.I am wondering if this application ( which simply calls the webervice and manupilates the data and sends back data to the caller , here drupal caller) needs to run as a Process on the  OS or as a cron JOB or under the control of Apache ?

what would be the best option to do this ?
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> .. and sends back data to the caller ..
You mean your web.Apart is called when the browser makes a proper request to your page and then part of the content in the request is generated by your web.Apart?

If so, why would you then
> .. want this utility app. to exist on its own

If your web page needs that functionality on demand, you can call it on demand, do you?

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