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Learning Spring Boot 3.0

Learning Spring Boot 3.0

By : Greg L. Turnquist
3.4 (14)
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Learning Spring Boot 3.0

Learning Spring Boot 3.0

3.4 (14)
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)
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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

Creating profile-based property files

In the previous section, we realized the ability to extract certain aspects of our application into property files. The next big step you can take is realizing how far you can go with this.

Inevitably, we run into situations such as carrying our application into a new environment and wondering, “can we change the properties for THIS situation?”

For example, what if our application, before release, has to be installed in a test bed where it can get checked out? The databases are different. The test team may want a different set of test accounts. And any other external services (message brokers, authentication systems, and so on) will probably also be different.

So, the question arises, “can I have a different set of properties?” To which Spring Boot says “yes!”

To check this out, create another property file. Call it application-test.properties and load it up, like this:

app.config.header...

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