Complex Event-Driven Architecture

Inspired by "I Made Everything Loosely Coupled. Does My App Fall Apart? ? Gregor Hohpe ? GOTO 2022" talk, on how we can design a well-structured manageable enterprise architecture.

Well the talk specifically, gears around building modern systems using a cloud-first architecture approach, In enterprise architecture, we deal with legacy and modern systems at the same time.

Few links on how we achieve complex Event-Driven Architecture with API Led Connectivity and the MuleSoft Anypoint Platform.

Some Guidelines

• Have an Async API Specification for the Event Channel [ Queues, Topics, Exchanges and more ] https://www.asyncapi.com/docs/reference/specification/v2.0.0
• Have a RAML/OAS specification for your RestFul APIs. https://developer.mulesoft.com/tutorials-and-howtos/getting-started/best-practices-first-api-spec/
• Stick strictly to the Design First approach and Automation all the way on every step of Spec-driven development.
• Have a well-defined loosely coupled architecture of Application Networks using a combination of Synchrony and Asynchrony. Restful for Synchrony and Async APIs for Asynchrony and limit messaging / events to fire and forget and channels to adhere to single purpose principle when using queues and topics and exchanges. https://www.mulesoft.com/sites/default/files/resource-assets/API-led-connectivity-new-soa-updated.pdf
• Build an effective data model at least at a bounded context model as per Domain Driven Design principles. https://pubs.opengroup.org/architecture/o-aa-standard/DDD-strategic-patterns.html
• Decouple Governance and Access Control with Aspect Oriented Programming Models, and API Gateways, and use client and Identity providers like OAuth 2.0 and JWT for user or client management. https://www.mulesoft.com/lp/whitepaper/api/cio-guide-universal-api-management https://blogs.mulesoft.com/news/introducing-universal-api-management-on-anypoint-platform/
• Choose a scalable and Shrinkable?infrastructure for strategic integration and adopt containers and microservices while decoupling infrastructure management.