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)

Reactive programming in Java and Spring 5

RxJava was introduced by Netflix engineers to support the Reactive model in Java 8, with the bridge to Reactive Streams. However, Java started supporting the Reactive model with Java 9, and Reactive Streams have been incorporated into the JDK as java.util.concurrent.Flow in Java 9.

Also, Pivotal introduced the Reactor framework, which is built directly on Reactive Streams, avoiding the external bridge to Reactive Streams. A Reactor is considered as a 4th generation library.

Finally, Spring Framework 5.0 added Reactive features built into it, including the tools for HTTP servers and clients. Spring users find annotations and controllers handy when they deal with HTTP requests, especially dispatching Reactive requests and back pressure concerns to the framework.

The Reactive model seems to be efficient in resource utilization, as it can process higher loads with fewer threads. However, the Reactive model may not be the right solution for all problems. In some cases, Reactor may make things worse if we use it in the wrong section.