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

Baking a Docker container with GraalVM

Earlier in this chapter, we installed GraalVM’s OpenJDK distribution and built our native application locally. But that’s not the only way, nor is it always the ideal way.

For example, if we plan to run our application on a cloud configuration based on Linux, then building an application locally on a MacBook Pro or a Windows machine won’t do.

In Chapter 7, Releasing an Application with Spring Boot, we learned how to use ./mvnw spring-boot:build-image and let a Paketo Buildpack assemble our application into a Docker container. We can use something similar to build a native application inside a Docker container.

Just run the following command:

% ./mvnw -Pnative spring-boot:build-image

This combines the previous chapter’s spring-boot:build-image command with the native Maven profile.

This process may take even longer than building the native application locally, but the benefit is that, when completed...