Spring 5.0 is due to arrive with a myriad of new and exciting features that will change the way we've used the framework so far. This book will show you this evolution--from solving the problems of testable applications to building distributed applications on the Cloud. The book begins with an insight into the new features in Spring 5.0, and shows you how to build an application using Spring MVC. You will then get a thorough understanding of how to build and extend microservices using the Spring Framework. You will also understand how to build and deploy Cloud applications. You will realize how application architectures have evolved from monoliths to those built around microservices. The advanced features of Spring Boot will also be covered and displayed through powerful examples. By the end of this book, you will be equipped with the knowledge and best practices to develop applications with the Spring Framework.
Chapter 1, Evolution to Spring Framework 5.0, takes you through the evolution of the Spring Framework, ranging from its initial versions to Spring 5.0. Initially, Spring was used to develop testable applications using dependency injection and core modules. Recent Spring Projects, such as Spring Boot, Spring Cloud, Spring Cloud Data Flow--deal with application infrastructure and moving applications to Cloud. We get an overview of different Spring modules and projects.
Chapter 2, Dependency Injection, dives deep into dependency injection. We will look at different kinds of dependency injection methods available in Spring, and how auto-wiring makes your life easy. We will also take a quick look into unit testing.
Chapter 3, Building a Web Application with Spring MVC, gives a quick overview of building a web application with Spring MVC.
Chapter 4, Evolution toward Microservices and Cloud-Native Applications, explains the evolution of application architectures in the last decade. We will understand why microservices and Cloud Native applications are needed and get a quick overview of the different Spring projects that help us build Cloud-Native applications.
Chapter 5, Building Microservices with Spring Boot, discusses how Spring Boot takes away the complexity in creating production-grade Spring-based applications. It makes it easy to get started with Spring-based projects and provides easy integration with third-party libraries. In this chapter, we will take the students on a journey with Spring Boot. We will start with implementing a basic web service and then move on to adding caching, exception handling, HATEOAS, and internationalization, while making use of different features from the Spring Framework.
Chapter 6, Extending Microservices, focuses on adding more advanced features to the microservices that we built in Chapter 4, Evolution toward Microservices and Cloud-Native Applications.
Chapter 7, Advanced Spring Boot Features, takes a look at the advanced features in Spring Boot. You will learn how to monitor a microservice with a Spring Boot Actuator. Then, you will deploy the microservice to Cloud. You will also learn how to develop more effectively with the developer tools provided by Spring Boot.
Chapter 8, Spring Data, discusses the Spring Data module. We will develop simple applications to integrate Spring with JPA and Big Data technologies.
Chapter 9, Spring Cloud, discusses the distributed systems in the Cloud that have common problems, configuration management, service discovery, circuit breakers, and intelligent routing. In this chapter, you will learn how Spring Cloud helps you develop solutions for these common patterns. These solutions should work well on the Cloud as well as developer local systems.
Chapter 10, Spring Cloud Data Flow, talks about the Spring Cloud Data Flow, which offers a collection of patterns and best practices for microservices-based distributed streaming and batch data pipelines. In this chapter, we will understand the basics of Spring Cloud Data Flow and use it to build basic data flow use cases.
Chapter 11, Reactive Programming, explores programming with asynchronous data streams. In this chapter, we will understand Reactive programming and take a quick look at the features provided by the Spring Framework.
Chapter 12, Spring Best Practices, helps you understand best practices in developing enterprise applications with Spring related to unit testing, integration testing, maintaining Spring configuration, and more.
Chapter 13,Working with Kotlin in Spring, introduces you to a JVM language gaining quick popularity--Kotlin. We will discuss how to setup a Kotlin project in Eclipse. We will create a new Spring Boot project using Kotlin and implement a couple of basic services with unit and integration testing.
To be able to run examples from this book, you will need the following tools:
- Java 8
- Eclipse IDE
- Postman
We will use Maven embedded into Eclipse IDE to download all the dependencies that are needed.
This book is for experienced Java developers who knows the basics of Spring, and wants to learn how to use Spring Boot to build applications and deploy them to the Cloud.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, and user input are shown as follows: "Configure spring-boot-starter-parent in your pom.xml file".
A block of code is set as follows:
<properties> <mockito.version>1.10.20</mockito.version> </properties>
Any command-line input or output is written as follows:
mvn clean installNew terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Provide the details and click on Generate Project."
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