Event System

A style of Pub/Sub system that uses Messages and Queues to enable communication across Microservices.

With an Event System, a service is able to emit information about itself that may or may not be relevant to other services. Instead of creating a request to each system that might be interestd in — for example — an article being updated, the CMS instead just sends data to the Event System that says this article was updated. The Event System than manages delivering that data to any other service that has subscribed to that channel.