Book Image

Building RESTful Web Services with Spring 5 - Second Edition

By : Raja CSP Raman, Ludovic Dewailly
Book Image

Building RESTful Web Services with Spring 5 - Second Edition

By: Raja CSP Raman, Ludovic Dewailly

Overview of this book

REST is an architectural style that tackles the challenges of building scalable web services. In today's connected world, APIs have taken a central role on the web. APIs provide the fabric through which systems interact, and REST has become synonymous with APIs.The depth, breadth, and ease of use of Spring makes it one of the most attractive frameworks in the Java ecosystem. Marrying the two technologies is therefore a very natural choice.This book takes you through the design of RESTful web services and leverages the Spring Framework to implement these services. Starting from the basics of the philosophy behind REST, you'll go through the steps of designing and implementing an enterprise-grade RESTful web service. Taking a practical approach, each chapter provides code samples that you can apply to your own circumstances.This second edition brings forth the power of the latest Spring 5.0 release, working with MVC built-in as well as the front end framework. It then goes beyond the use of Spring to explores approaches to tackle resilience, security, and scalability concerns. Improve performance of your applications with the new HTTP 2.0 standards. You'll learn techniques to deal with security in Spring and discover how to implement unit and integration test strategies.Finally, the book ends by walking you through building a Java client for your RESTful web service, along with some scaling techniques using the new Spring Reactive libraries.
Table of Contents (21 chapters)
Title Page
Copyright and Credits
Packt Upsell
Spring Security and JWT (JSON Web Token)

Benefits of Reactive programming

Let's assume we have one million user transactions happening in our application. Next year, it is going to increase to 10 million, so we need to scale it. The traditional method of doing this is to add enough servers (horizontal scaling).

Instead of doing horizontal scaling, what if we get an option to scale with the same servers? Yes, Reactive programming will help us to do that. Reactive programming is all about non-blocking applications that are synchronous and event-driven, and it doesn't require a lot of threads to scale vertically (within the JVM) rather than horizontally (through clustering).

Reactive types are not intended to process requests faster. However, they focus more on request concurrency, especially requesting data from a remote server efficiently. With Reactive type support, you will get higher-quality service. While comparing traditional processing, which blocks the current thread while waiting for a result, a Reactive API requests only...