implementing-microservices / event-sourcing

event-sourcing

Problem definitions inspired by: https://docs.microsoft.com/en-us/azure/architecture/patterns/event-sourcing

Microservices:

Shopping Cart Microservice

1. Jobs-To-Be Done
2. Actions

Emits following events:

1. an item added to a user cart
   • user_id
   • cart_id
   • product_id
   • price
   • count
   • productOptions
2. an item removed from a user cart
3. shipping information updated
4. shipping information removed
5. payment information added
6. payment information removed

Listens to following events:

1. ms-payment.payment-processed

Payment Processing Microservice (ms-payment)

Emits following events:

1. Payment Processed. Data elements:
   • cart_id
2. Payment Failed
   • cart_id

Past Orders Microservice

Listens to events from Shopping Cart to create query-able, materialized view. Returns reverse-chronologically ordered list of orders