Microservices with Clojure

Hexagonal architecture

Hexagonal architecture (http://alistair.cockburn.us/Hexagonal+architecture), also known as the ports and adapters pattern, aims to decouple business logic from other parts of the component, especially the persistence and services layers. A component, built on the ports and adapters pattern, exposes a set of ports to which one or more adapters can be added as necessary. For example, to test and verify the core business logic in isolation, a mock database adapter can be plugged in and later replaced with a runtime database adapter in production.

A port is an entry point that is provided by the core business logic to interact with other parts of the component. An adapter is an implementation of a port, and there may be ...