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)

Scaling databases

Scaling the database is one of the challenging parts of architectural design. Here, we will discuss some database scaling techniques to scale our application.

Vertical scaling

As we discussed earlier, in the application server level we can also utilize the scaling up technique for our database servers. Adding more power, such as CPU and RAM, will bring better performance in querying databases. By using vertical scaling techniques, we can get consistent performance, and it's also easy to debug when things go wrong. Also, vertical scaling offers increased efficiency compared to horizontal scaling. However, vertical scaling might require downtime regularly to install new hardware, and it is limited by the hardware capacity.

Horizontal scaling

As we discussed with horizontal scaling in the application level, we can do the same for database servers by adding more machines to our cluster to take care of the database load. Compared to vertical scaling, it is significantly cheaper...