Spring Microservices in Action

Chapter 1: Introduction to Spring Microservices

This chapter introduces the concept of microservices and explains the benefits they offer. It also covers the key principles of microservice design, such as modularity, independence, and fault tolerance.

Real-world example: A company can use microservices to separate its complex system into smaller, independent components. This allows them to update and deploy these components independently, reducing the risk of downtime and improving overall flexibility.

Chapter 2: Getting Started with Spring Boot

This chapter provides a step-by-step guide to creating a simple Spring Boot microservice. It covers the basics of Spring Boot, including how to create and configure your application, as well as how to add dependencies and write controllers.

Real-world example: You can create a simple Spring Boot microservice to manage user accounts. This service can be used by other applications to perform tasks such as creating, updating, and deleting user accounts.

Chapter 3: Building RESTful APIs

This chapter covers the fundamentals of building RESTful APIs with Spring Boot. It explains how to use Spring MVC to create controllers, define endpoints, and handle HTTP requests.

Real-world example: You can use Spring Boot to build a RESTful API for a blog. This API can be used by front-end applications to retrieve blog posts, create new posts, and update existing ones.

Chapter 4: Handling Data with Spring Data JPA

This chapter introduces Spring Data JPA, a powerful framework for interacting with databases in a type-safe manner. It explains how to use Spring Data JPA to define entities, repositories, and queries.

Real-world example: You can use Spring Data JPA to create a repository for the user accounts managed by the microservice in Chapter 2. This repository can be used to perform CRUD (Create, Read, Update, Delete) operations on the user accounts.

Chapter 5: Implementing Authentication and Authorization

This chapter covers the principles of authentication and authorization in microservices. It explains how to use Spring Security to implement these features, including how to configure authentication providers and authorization mechanisms.

Real-world example: You can use Spring Security to implement authentication and authorization for the blog API created in Chapter 3. This ensures that only authorized users can access and modify blog posts.

Chapter 6: Communicating Between Microservices

This chapter discusses the different ways to communicate between microservices, such as HTTP, message brokers, and event sourcing. It explains the advantages and disadvantages of each approach.

Real-world example: You can use HTTP to communicate between the user account microservice and the blog API. This allows the blog API to retrieve user information from the user account microservice before creating or updating blog posts.