Spring in Action

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After ten years, this is still the clearest and most comprehensive introduction to the core concepts of the Spring platform.

Spring Boot enhances Spring development so much that it’s hard to imagine developing Spring applications without it. For that reason, this book treats Spring and Spring Boot as if they were one and the same. We’ll use Spring Boot as much as possible, and explicit configuration only when necessary. And, because Spring XML configuration is the old-school way of working with Spring, we’ll focus primarily on Spring’s Java-based configuration. Chapter 5 reveals how to configure a Spring application using Spring Boot configuration properties. You’ll also learn how to selectively apply configuration using profiles.The only book you’ll ever need to learn and master the Spring ecosystem. This update is a must-read. Historically, the way you would guide Spring’s application context to wire beans together was with one or more XML files that described the components and their relationship to other components. For example, the following XML declares two beans, an InventoryService bean and a ProductService bean, and wires the InventoryService bean into ProductService via a constructor argument:

In addition to the new reactive programming features of Spring 5, Spring Boot 2 now provides even more autoconfiguration support than ever before as well as a completely reimagined Actuator for peeking into and manipulating a running application.

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Chapter 8 looks at using asynchronous communication to enable a Spring application to both send and receive messages using the Java Message Service, RabbitMQ, or Kafka.

You’re able to think of your dependencies in terms of what capabilities they provide, rather than in terms of library names. If you’re developing a web application, you’ll add the web starter dependency rather than a laundry list of individual libraries that enable you to write a web application. Chapter 10 introduces Project Reactor, the reactive programming library that underpins Spring 5’s reactive features. The diversity of the drawings in the Encyclopédie des Voyages speaks vividly of the distinctiveness and individuality of the world’s towns and provinces just two hundred years ago. This was a time when the dress codes of two regions separated by a few dozen miles identified people uniquely as belonging to one or the other. The travel guide brings to life a sense of isolation and distance of that period, and of every other historic period except our own hyperkinetic present.Spring in Action, 5th edition is for Java developers who want to get started with Spring Boot and the Spring Framework as well as for seasoned Spring developers who want to go beyond the basics and learn the newest features of Spring. How this book is organized: a roadmap

Your build file will be significantly smaller and easier to manage because you won’t need to declare a dependency on every library you might need. I’m happy to say that this fifth edition of Spring in Action covers all of this and more! If you’re a seasoned veteran with Spring, Spring in Action, Fifth Edition will be your guide to everything new that Spring has to offer. On the other hand, if you’re new to Spring, then there’s no better time than now to get in on the action and the first few chapters will get you up and running in no time! You may recognize this as a typical Maven or Gradle project structure, where application source code is placed under src/main/java, test code is placed under src/test/java, and non-Java resources are placed under src/main/resources. Within that project structure, you’ll want to take note of these items: Finally, in chapter 19 you’ll see how to deploy your Spring application in a variety of production environments. mvnw and mvnw.cmd—These are Maven wrapper scripts. You can use these scripts to build your project even if you don’t have Maven installed on your machine.

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Chapter 16 introduces the Spring Boot Actuator, an extension to Spring Boot that exposes the internals of a running Spring application as REST endpoints. You’re freed from the burden of worry about library versions. You can trust that for a given version of Spring Boot, the versions of the libraries brought in transitively will be compatible. You only need to worry about which version of Spring Boot you’re using. Designed in 2003 as a lighter approach to J2EE development, Spring Framework has since become a standard choice for building enterprise applications and required knowledge for Java developers. Spring 4 provides full Java 8 integration along with key upgrades like new annotations for the IoC container, improvements to Spring Expression Language, and much-needed support for REST. Whether you're just discovering Spring or you want to absorb the new features, there's no better way to master Spring than with this book. At Manning, there were several people working their magic to make sure that this book is the best it can possibly be. Many thanks in particular to Jenny Stout, my development editor, and to the production team, including project manager Janet Vail, copyeditors Andy Carroll and Frances Buran, and proofreaders Katie Tennant and Melody Dolab. Thanks, too, to technical proofer Joshua White who was thorough and helpful.