Book Image

Microservices with Spring Boot and Spring Cloud - Second Edition

By : Magnus Larsson
3.5 (2)
Book Image

Microservices with Spring Boot and Spring Cloud - Second Edition

3.5 (2)
By: Magnus Larsson

Overview of this book

Want to build and deploy microservices, but don’t know where to start? Welcome to Microservices with Spring Boot and Spring Cloud. This edition features the most recent versions of Spring, Java, Kubernetes, and Istio, demonstrating faster and simpler handling of Spring Boot, local Kubernetes clusters, and Istio installation. The expanded scope includes native compilation of Spring-based microservices, support for Mac and Windows with WSL2, and an introduction to Helm 3 for packaging and deployment. A revamped security chapter now follows the OAuth 2.1 specification and makes use of the newly launched Spring Authorization Server from the Spring team. You’ll start with a set of simple cooperating microservices, then add persistence and resilience, make your microservices reactive, and document their APIs using OpenAPI. Next, you’ll learn how fundamental design patterns are applied to add important functionality, such as service discovery with Netflix Eureka and edge servers with Spring Cloud Gateway. You’ll deploy your microservices using Kubernetes and adopt Istio, then explore centralized log management using the Elasticsearch, Fluentd, and Kibana (EFK) stack, and then monitor microservices using Prometheus and Grafana. By the end of this book, you'll be building scalable and robust microservices using Spring Boot and Spring Cloud.
Table of Contents (6 chapters)

Adding Persistence

In this chapter, we will learn how to persist data that a microservice is using. As already mentioned in Chapter 2, Introduction to Spring Boot, we will use the Spring Data project to persist data to MongoDB and MySQL databases.

The product and recommendation microservices will use Spring Data for MongoDB and the review microservice will use Spring Data for the JPA (short for the Java Persistence API) to access a MySQL database. We will add operations to the RESTful APIs to be able to create and delete data in the databases. The existing APIs for reading data will be updated to access the databases. We will run the databases as Docker containers, managed by Docker Compose, that is, in the same way as we run our microservices.

The following topics will be covered in this chapter:

  • Adding a persistence layer to the core microservices
  • Writing automated tests that focus on persistence
  • Using the persistence layer in the service layer
  • ...