[Qgis-user] Using Processing for nightly ETL jobs

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Dear List,

has anybody already used QGIS' processing framework for performing 
nightly ETL jobs?

I need to have nightly jobs run that
1) download data (e.g. from a WFS server),
2) perform some tasks like renaming fields or the like
3) and finally load them into a PostGIS database.

My idea would be to design the process using the modeller. How can I 
have the thus created model run non interactively?

Any ideas are welcome

Bernhard