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.

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Table of Contents (17 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the example code files
Download the color images
Conventions used
Get in touch
Share Your Thoughts
Download a free PDF copy of this book
1
Part 1: The Basics of Spring Boot
Part 1: The Basics of Spring Boot
Free Chapter
2
Chapter 1: Core Features of Spring Boot
Chapter 1: Core Features of Spring Boot
Technical requirements
Autoconfiguring Spring beans
Adding portfolio components using Spring Boot starters
Customizing the setup with configuration properties
Managing application dependencies
Summary
3
Part 2: Creating an Application with Spring Boot
Part 2: Creating an Application with Spring Boot
4
Chapter 2: Creating a Web Application with Spring Boot
Chapter 2: Creating a Web Application with Spring Boot
Using start.spring.io to build apps
Creating a Spring MVC web controller
Using start.spring.io to augment an existing project
Leveraging templates to create content
Creating JSON-based APIs
Hooking in Node.js to a Spring Boot web app
Summary
5
Chapter 3: Querying for Data with Spring Boot
Chapter 3: Querying for Data with Spring Boot
Adding Spring Data to an existing Spring Boot application
DTOs, entities, and POJOs, oh my!
Creating a Spring Data repository
Using custom finders
Using Query By Example to find tricky answers
Using custom JPA
Summary
6
Chapter 4: Securing an Application with Spring Boot
Chapter 4: Securing an Application with Spring Boot
Adding Spring Security to our project
Creating our own users with a custom security policy
Swapping hardcoded users with a Spring Data-backed set of users
Securing web routes and HTTP verbs
Securing Spring Data methods
Leveraging Google to authenticate users
Summary
7
Chapter 5: Testing with Spring Boot
Chapter 5: Testing with Spring Boot
Adding JUnit 5 to the application
Creating tests for your domain objects
Testing web controllers with MockMVC
Testing data repositories with mocks
Testing data repositories with embedded databases
Adding Testcontainers to the application
Testing data repositories with Testcontainers
Testing security policies with Spring Security Test
Summary
8
Part 3: Releasing an Application with Spring Boot
Part 3: Releasing an Application with Spring Boot
9
Chapter 6: Configuring an Application with Spring Boot
Chapter 6: Configuring an Application with Spring Boot
Creating custom properties
Creating profile-based property files
Switching to YAML
Setting properties with environment variables
Ordering property overrides
Summary
10
Chapter 7: Releasing an Application with Spring Boot
Chapter 7: Releasing an Application with Spring Boot
Creating an uber JAR
Baking a Docker container
Releasing your application to Docker Hub
Tweaking things in production
Summary
11
Chapter 8: Going Native with Spring Boot
Chapter 8: Going Native with Spring Boot
What is GraalVM and why do we care?
Retrofitting our application for GraalVM
Running our native Spring Boot application inside GraalVM
Baking a Docker container with GraalVM
Summary
12
Part 4: Scaling an Application with Spring Boot
Part 4: Scaling an Application with Spring Boot
13
Chapter 9: Writing Reactive Web Controllers
Chapter 9: Writing Reactive Web Controllers
What is reactive and why do we care?
Creating a reactive Spring Boot application
Serving data with a reactive GET method
Consuming incoming data with a reactive POST method
Serving a reactive template
Creating hypermedia reactively
Summary
14
Chapter 10: Working with Data Reactively
Chapter 10: Working with Data Reactively
Learning what it means to fetch data reactively
Picking a reactive data store
Creating a reactive data repository
Trying out R2DBC
Summary
15
Index
Index
Why subscribe?
16
Other Books You May Enjoy
Other Books You May Enjoy
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To get the most out of this book

Spring Boot 3.0 is built on Java 17. By using sdkman (https://sdkman.io), you can easily install the version of Java needed. In Chapter 8, Going Native with Spring Boot, we’ll include instructions on how to use sdkman to install a specific flavor of Java 17 that supports building native images for GraalVM. While it’s possible to write code using a barebones text editor, any modern IDE (see the following list) will greatly enhance the coding experience. Check out the one that works best for you.

Software/hardware covered in the book

Operating system requirements

sdkman (for Java 17) (https://sdkman.io)

Windows, macOS, or Linux

Any modern IDE will help with writing code:

Windows, macOS, or Linux

VS Code and Spring Tool Suite are free. IntelliJ IDEA has a Community Edition and an Ultimate Edition. The Community Edition is free, but some of the Spring-specific features require purchasing the Ultimate Edition. There is a 30-day trial to give it a spin.

If you are using the digital version of this book, we advise you to type the code yourself or access the code from the book’s GitHub repository (a link is available in the next section). Doing so will help you avoid any potential errors related to the copying and pasting of code.

This book, however, isn’t the end of your journey into building Spring Boot apps. Check out my YouTube channel, Spring Boot Learning (http://bit.ly/3uSPLCz), where I publish videos all the time on Spring Boot and software engineering. There are also additional resources at https://springbootlearning.com to help you write better apps!

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