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

Testing data repositories with Testcontainers

The first step when it comes to using Testcontainers is configuring the test case. To talk to a Postgres database, do this:

@Testcontainers
@DataJpaTest
@AutoConfigureTestDatabase(replace = Replace.NONE)
public class VideoRepositoryTestcontainersTest {
  @Autowired VideoRepository repository;
  @Container //
  static final PostgreSQLContainer<?> database = //
    new PostgreSQLContainer<>("postgres:9.6.12") //
      .withUsername("postgres");
}

This framework for test cases can be described as follows:

  • @Testcontainers: The annotation from the Testcontainers junit-jupiter module that hooks into the life cycle of a JUnit 5 test case.
  • @DataJpaTest: Spring Boot Test’s annotation we used in the previous section, indicating that all entity classes and Spring Data JPA repositories should be scanned.
  • @AutoConfigureTestDatabase...