The Dominant Programmer

Apr 29, 2026 · Backend Development

Spring MVC + OpenFeign: Contract‑First API, Controller Logic, and Feign Reuse in Microservices

This article explains a standard Spring MVC + OpenFeign design pattern for microservices, where a contract‑first interface defines routing and API specs, Controllers implement business logic, and Feign clients reuse the same interface for remote calls, with full Maven project setup, code samples, and Nacos integration.