Event Driven Architecture

Intent

Send and notify state changes of your objects to other applications using an Event-driven Architecture.

Class diagram

Event Driven Architecture

Applicability

Use an Event-driven architecture when

• Chargify, a billing API, exposes payment activity through various events (https://docs.chargify.com/api-events)
• Amazon's AWS Lambda, lets you execute code in response to events such as changes to Amazon S3 buckets, updates to an Amazon DynamoDB table, or custom events generated by your applications or devices. (https://aws.amazon.com/lambda)
• you want a system that is easier to extend

Real world examples

• Event-driven architecture - Wikipedia
• What is an Event-Driven Architecture
• Real World Applications/Event Driven Applications
• Event-driven architecture definition