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)

Slice-based testing

Across the industry, many express an interest in testing. Yet, when push comes to shove and we run into tricky situations, it's quite easy to throw up our hands and shout, This is too hard!

Spring Boot aims to help!

JUnit, all by itself, gives us the power to declare tests and assert pass/fail scenarios. But in reality, not everything works straight out of the box. For example, parts of our code will easily come to rely upon Boot autoconfiguring various beans as well as having that powerful property support.

A keen example is the need to do some MongoDB operations. It would be quite handy if we could ask Spring Boot to autoconfigure just enough beans to support MongoDB for our tests but nothing else.

Well, today's our lucky day.

Spring Boot 1.5 introduced slice testing. This is where a subset of Spring Boot's autoconfiguration power can be switched...