Book Image

Learning Spring Boot 3.0 - Third Edition

By : Greg L. Turnquist
Book Image

Learning Spring Boot 3.0 - Third Edition

By: Greg L. Turnquist

Overview of this book

Spring Boot 3 brings more than just the powerful ability to build secure web apps on top of a rock-solid database. It delivers new options for testing, deployment, Docker support, and native images for GraalVM, along with ways to squeeze out more efficient usage of existing resources. This third edition of the bestseller starts off by helping you build a simple app, and then shows you how to secure, test, bundle, and deploy it to production. Next, you’ll familiarize yourself with the ability to go “native” and release using GraalVM. As you advance, you’ll explore reactive programming and get a taste of scalable web controllers and data operations. The book goes into detail about GraalVM native images and deployment, teaching you how to secure your application using both routes and method-based rules and enabling you to apply the lessons you’ve learned to any problem. If you want to gain a thorough understanding of building robust applications using the core functionality of Spring Boot, then this is the book for you. By the end of this Spring Boot book, you’ll be able to build an entire suite of web applications using Spring Boot and deploy them to any platform you need.
Table of Contents (17 chapters)
1
Part 1: The Basics of Spring Boot
3
Part 2: Creating an Application with Spring Boot
8
Part 3: Releasing an Application with Spring Boot
12
Part 4: Scaling an Application with Spring Boot

Adding Testcontainers to the application

We have seen that, with mocking, we can replace a real service with a fake one. But what happens when you need to verify a real service, which involves talking to a real database?

The fact that each database engine has slight variations in implementations of SQL demands that we test our database operations against the same version we intend to use in production!

With the emergence of Docker in 2013 and the rise of putting various tools and applications inside containers, it has become possible to find a container for the database we seek.

Further cultivated by open source, just about every database we can find has a containerized version.

While this makes it possible for us to spin up an instance on our local workstation, the task of manually launching a local database every time we want to run our tests doesn’t quite cut it.

Enter Testcontainers. With their first release coming out in 2015, Testcontainers provides a mechanism...