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
Dedication
Packt Upsell
Contributors
Preface
6
Spring Security and JWT (JSON Web Token)
Index

Clustering


Simply put, clustering is nothing but adding more than one server to provide the same service. It will help us to avoid interruptions during disasters such as system crashes and other unfortunate situations. Clustering can be used as a failover system, a load balancing system, or a parallel processing unit.

A failover cluster is a group of servers with the sample applications duplicated in all servers to provide the same services to clients to maintain the high availability of applications and services. If a server fails for some reason, the rest of the servers will take over the load and provide uninterrupted services to consumers.

  • Scaling up (vertical scaling): This is about adding more resources to our servers, for example, increasing the RAM, hard drive capacity, and processors. Though it might be a good option, it will only be applicable for certain scenarios, not all. In some cases, adding more resources might be expensive.
  • Scaling out (horizontal scaling): Unlike adding more...