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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 a Spring Data repository

What is the best query? The one we don’t have to write!

This may sound absurd, but Spring Data really makes it possible to write lots of queries…without writing them. The simplest one is based on the repository pattern.

This pattern was originally published in Patterns of Enterprise Application Architecture, Martin Fowler, Addison-Wesley.

A repository essentially gathers all the data operations for a given domain type in one place. The application talks to the repository in domain speak, and the repository in turn talks to the data store in query speak.

Before Spring Data, we had to write this translation of action by hand. But Spring Data provides the means to read the metadata of the data store and perform query derivation.

Let’s check it out. Create a new interface called VideoRepository.java, and add the following code:

public interface VideoRepository extends JpaRepository
  <VideoEntity, Long...

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