Learning the patterns with a few code examples always provides us with great insights. In this chapter, we discussed versioning our APIs, securing APIs with authorization, and enabling the service clients with uniform contract, entity endpoint, and endpoint redirection implementations. We also learned about Idempotent and its importance, which powers APIs with bulk operations. The most important part of this chapter is the circuit-breaker implementation with Hysterix, where we envisioned and implemented the resiliency patterns of API designs.

Having covered various advanced patterns, we concluded the chapter with the BFF pattern, and we learned how it reduces churns within the cross-implementation team by helping them to develop an exclusive interface for target environments.

In the next chapter, we'll cover RESTful API gateways, which should be an equally exciting read for API designers.