The scope is the operations that the Farmacy Food replenisher can perform related to inspecting the stock and replenishing the fridges and vendor kiosks. The scope also includes updating the status of fridges and vendor stores.
This is a microservice architecture. Key patterns used:
- BFF
- Database per Microservice (aka Database per Service)
- CQRS
- Mobile application created using a native language for Android, such as Kotlin or Java.
- It's the application the replenisher uses to enter stock updates into the system, both for fridges and vendor kiosks.
- Central access point for calls coming from the Replenisher's Android app.
- Produces inventory events to a pub-sub topic for placing or removing meals, and updating stock information.
- Listener to inventory events that correspond to actions taken by the replenisher at the pick-up point. Examples of such events include: Meals Added to Fridge, Meals Removed from Fridge, Meals Added to Vendor Kiosk.
- It updates stock information in the primary inventory DB for vendor kiosks and fridges.
- Batch program that in a loop reads data from Inventory, Kiosks and Fridges data sources in order to synchronize data to the Inventory query view.
- The inventory query view is also used when customers look at meals in the catalog, and when the user is placing an order. In both cases, the system needs to know what items are available and what points of sale (kiosks and smart fridges) are operational for purchase and pick up. That's why the inventory query view contains inventory data as well as status and other data about the fridges and vendor kiosks.
- Updates the status of smart fridges (see state machine diagram below) based on different events.
- Events coming from the replenisher app indicate meals added/removed from a fridge, and possibly some status information (say, the replenisher found a technical problem to report).
- Events coming from calling (in a loop) the smart fridge cloud-based system to query the status of fridges.
- When processing events from the replenisher app, Fridge control will call the third party smart fridge system (via a wrapper service) to update stock information based on meals added or removed by the replenisher.
- Change status of vendor location: open, closed temporarily, business closed
- Working with vendor system, by a wrapper, to update stock information (placing or removing meals)
- Batch program that in a loop calls the cloud-based smart fridge management system to get the status of the Farmacy Food fridges.
- It makes the calls via a wrapper service.
- Batch program that in a loop calls the cloud-based vendor kiosk management system to get the status of the vendor kiosks points of sale.
- It makes the calls via a wrapper service.
- UML state machine diagram showing the status of a fridge (from a Farmacy Food system perspective).
