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)

Sharing session details with other microservices

Something that's critical to our microservice-based social media platform is sharing the session details when putting things together. When we load the main page, it may have to pull together bits of data from multiple places. This means that after logging in to the system, the session ID that is generated has to be passed along seamlessly.

Spring Cloud Gateway can forward various requests, but Spring Session has a lazy approach to things. This means, we need to step up and save the session immediately; otherwise, the first few remote calls might fail.

To do so, we need to create a custom Spring Cloud Gateway filter as follows:

    public class GatewayConfig { 
      private static final Logger log = 
      * Force the current WebSession...