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)


Like Postman, SoapUI is another open source tool that is used to test web services. SoapUI helps in web service invoking, mocking, simulation, load testing, and functional testing. SoapUI is heavily used in load testing, and it has lots of controls to make load testing easy.

SoapUI is very easy to install in operating systems such as Windows and Linux. Its user interface gives us a lot of flexibility to build complex test scenarios. Also, SoapUI supports third-party plugins such as TestMaker and Agiletestware, and it's easy to integrate with IDEs such as NetBeans and Eclipse.

Getting all the users – SoapUI

We will use SoapUI to test our basic API (/user). The following method will get all the users when we use them in SoapUI using the GET method:


The SoapUI screenshot for getting all the users is as follows:

We will try to add a user using the POST method:


The added user screenshot will be as follows:

In this result, we can see the JSON...