This example architecture is built on the Basic enterprise integration architecture. It extends that architecture to show how to integrate enterprise backend systems, by using message brokers and events to decouple services for greater scalability and reliability. Ensure that you're familiar with that design and the components used in the basic integration architecture. It provides foundational information on the core components of this architecture, which won't be reproduced here.
https://learn.microsoft.com/en-us/azure/architecture/example-scenario/integration/queues-events
