Book Image

Learning Spring Boot 2.0 - Second Edition

By : Greg L. Turnquist, Greg L. Turnquist
Book Image

Learning Spring Boot 2.0 - Second Edition

By: Greg L. Turnquist, Greg L. Turnquist

Overview of this book

Spring Boot provides a variety of features that address today's business needs along with today's scalable requirements. In this book, you will learn how to leverage powerful databases and Spring Boot's state-of-the-art WebFlux framework. This practical guide will help you get up and running with all the latest features of Spring Boot, especially the new Reactor-based toolkit. The book starts off by helping you build a simple app, then shows you how to bundle and deploy it to the cloud. From here, we take you through reactive programming, showing you how to interact with controllers and templates and handle data access. Once you're done, you can start writing unit tests, slice tests, embedded container tests, and even autoconfiguration tests. We go into detail about developer tools, AMQP messaging, WebSockets, security, and deployment. You will learn how to secure your application using both routes and method-based rules. By the end of the book, you'll have built a social media platform from which to apply the lessons you have learned to any problem. If you want a good understanding of building scalable applications using the core functionality of Spring Boot, this is the book for you.
Table of Contents (11 chapters)

Creating configuration property beans

@EnableConfigurationProperties, applied anywhere in our application, will cause a bean of the named type, ChatConfigProperties, to get added to the application context. A configuration property bean is meant to hold various settings that can be configured with optional defaults and can be overridden through various means.

Remember properties like server.port where we adjusted the default port our Netty web container listened for web requests? All the properties we've seen through this book are all configuration property beans. This annotation simply gives us the means to define our own property settings specific to our application.

In this case, ChatConfigProperties is aimed at configuring the WebSocket broker.

It's not critical that the annotation be applied to this specific class. It's just convenient since it's the place...