I have a `Drupal 7` website that is intend to be fed by a `JSON` file.
This file, is actually processed and updated by a `ETL` tool that runs periodically (each 3 hours by example).

Once my `ETL` tool has processed the output JSON file, I need a way to tell the Drupal `Feeds` module to start the import.

Is it possible ? Or do I need to do this with `CRON` ?

Ideally, this job would be trigged by a specific URL call (just like the CRON can be called manually by visiting a specific url).