Closed architectures are dead. But there’s a war going on : should architectures be API first to facilitate fail-fast one-to-one interactions or Event first to facilitate fan out interactions where eventual consistency is acceptable?

In this talk, I will describe the concept of AFEA (API first, Event always architectures) which allow:

• Designing services by first thinking in terms of API and events through strategic Domain Driven Design

• Enjoying the benefits of both APIs and events while mitigating their respective trade-offs

• Exposing APIs, web hooks and events in a single developer portal