Book Image

Spring: Microservices with Spring Boot

By : Ranga Rao Karanam
Book Image

Spring: Microservices with Spring Boot

By: Ranga Rao Karanam

Overview of this book

Microservices helps in decomposing applications into small services and move away from a single monolithic artifact. It helps in building systems that are scalable, flexible, and high resilient. Spring Boot helps in building REST-oriented, production-grade microservices. This book is a quick learning guide on how to build, monitor, and deploy microservices with Spring Boot. You'll be first familiarized with Spring Boot before delving into building microservices. You will learn how to document your microservice with the help of Spring REST docs and Swagger documentation. You will then learn how to secure your microservice with Spring Security and OAuth2. You will deploy your app using a self-contained HTTP server and also learn to monitor a microservice with the help of Spring Boot actuator. This book is ideal for Java developers who knows the basics of Spring programming and want to build microservices with Spring Boot. This book is embedded with useful assessments that will help you revise the concepts you have learned in this book. This book is repurposed for this specific learning experience from material from Packt's Mastering Spring 5.0 by Ranga Rao Karanam.
Table of Contents (7 chapters)

Documenting REST Services

Before a service provider can consume a service, they need a service contract. A service contract defines all the; details about a service:

  • How can I call a service? What is the URI of the service?

  • What should be the request format?

  • What kind of response should I expect?

There are multiple options to define a service contract for RESTful services. The most popular one in the last couple of years is Swagger. Swagger is gaining a lot of ground, with support from major vendors in the last couple of years. In this section, we will generate Swagger documentation for our services.

The following quote from the Swagger website ( defines the purpose of the Swagger specification:

Swagger specification creates the RESTful contract for your API, detailing all of its resources and operations in a human and machine readable format for easy development, discovery, and integration.

Generating a Swagger Specification

One of the interesting developments in the last few...