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

Retrofitting our application for GraalVM

There are always two ways to approach building a native application: create a brand-new application or take an existing one and update it. Thanks to Spring Boot 3.0 and their adoption of native application support, it’s very easy to update an existing application to use GraalVM instead of the JVM.

What is Java Virtual Machine code?

Java code has always, since the dawn of time, been compiled into bytecode, meant to be run on Java Virtual Machine (JVM). This has resulted in the common expression write once, run anywhere. Any compiled Java bytecode, due to every aspect of these files being captured by the Java specification, can be run on any compliant JVM, no matter what machine it lives on. This was a huge departure from a previous era that involved compiling separately for every single machine architecture an app would get deployed to. This was revolutionary in its day and has allowed other post-compilation enhancements such as...