Book Image

Learning Spring Boot 2.0 - Second Edition

By : Greg L. Turnquist, Greg L. Turnquist
Book Image

Learning Spring Boot 2.0 - Second Edition

By: Greg L. Turnquist, Greg L. Turnquist

Overview of this book

Spring Boot provides a variety of features that address today's business needs along with today's scalable requirements. In this book, you will learn how to leverage powerful databases and Spring Boot's state-of-the-art WebFlux framework. This practical guide will help you get up and running with all the latest features of Spring Boot, especially the new Reactor-based toolkit. The book starts off by helping you build a simple app, then shows you how to bundle and deploy it to the cloud. From here, we take you through reactive programming, showing you how to interact with controllers and templates and handle data access. Once you're done, you can start writing unit tests, slice tests, embedded container tests, and even autoconfiguration tests. We go into detail about developer tools, AMQP messaging, WebSockets, security, and deployment. You will learn how to secure your application using both routes and method-based rules. By the end of the book, you'll have built a social media platform from which to apply the lessons you have learned to any problem. If you want a good understanding of building scalable applications using the core functionality of Spring Boot, this is the book for you.
Table of Contents (11 chapters)

Using Spring Session

Before we can dig into those nice security policies and authorization rules we just talked about, we need a solution to secure multiple microservices.

What is the exact problem? When we log in to the first piece of our social media platform, we want that status to be carried through to the other components with ease.

The solution is Spring Session (, which supports multiple third-party data stores to offload session state including Redis, MongoDB, GemFire, Hazelcast, and others. Instead of the session data being stored in memory, it is externalized to a separate data store.

This provides multiple benefits such as the following:

  • Provides scalability when running multiple instances of various services
  • Avoids the need for session affinity (sticky sessions) by not requiring load balancers to route clients to the same...