How should i represent a file importer in Domain Driven Design structure?

I have an onion architecture like this:

http://ift.tt/1zRi2mm

I need to create an importer that will monitor a folder and import files to database.

This importer will run on a Windows Forms application .

The component importer (class) is part of my infrastructure or my domain?

Otherwise how it should be represented following the DDD principles?