sample request for DataManager: http:https://localhost:8080/inventory?category=milk&timestamp=1479249799770 sample output: { "timestamp": "2016-11-15T22:43:19Z", "geoInventories": [ { "lat": 80.0, "lng": 23.0022, "items": [ { "name": "Potatoes", "quantity": 1.3, "unit": "kg" }, { "name": "Potatoes", "quantity": 1.3, "unit": "kg" } ] } ] }