An example application which uses an IHostedService/BackgroundService to periodically check if the local cache needs to be updated from events that have been journaled. In this case, journaled means that the application will publish an event to a database.
There are two microservices, Billing.API and Customer.API. The Billing.API service will manage invoices for customers. Each invoice will include the customer name which can be changed through the Customer.API. The Customer.API will journal the CustomerNameChangedEvent and the Billing.API will have a background task to look at the journaling database periodically to see if any new events have come in, and if so it will update the customer name on the saved invoices.
Created for blog post: https://devblog.appriver.com/implementing-background-tasks-with-ihostedservice/
