In this chapter, we will be introduced to how to build a set of cooperating microservices using Spring Boot, focusing on how to develop functionality that delivers business value. The challenges that we pointed out in the previous chapter will be considered only to some degree, but they will be addressed to their full extent in later chapters.
We will develop microservices that contain business logic based on plain Spring Beans and REST APIs using Spring WebFlux, the Swagger/OpenAPI-based documentation of the REST APIs, and SpringFox and data persistence, while using Spring Data to store data in both SQL and NoSQL databases
Since Spring Boot v2.0 was released in March 2018, it has become much easier to develop reactive microservices (refer to Chapter 1, Introduction to Microservices, the Reactive microservices...