Introducing Spring Framework

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Chapter 19 Spring Boot, Simplifying Everything In Chapter 1, I showed a sneak peek of Spring Boot, a new technology by the Spring Framework team. In this chapter, you are going to translate your My Documents application into a Spring Boot application. You can think of Spring Boot as a bootstrap engine that helps to create stand-alone and production-ready Spring applications with minimal effort—just code, and you don’t have to worry about any extra configuration. Spring Boot gives you the flexibility to use Java or even Groovy scripts to create applications without any configuration files. In previous chapters, you depended on XML configuration files. Spring Boot eliminates all that! Spring Boot Let’s start coding. Your first Spring Boot application will be in Java and you will still use Gradle as your building and testing tool. Listing 19-1 shows the build.gradle file and all the necessary dependencies. Listing 19-1. build.gradle buildscript { repositories { jcenter() mavenCentral() maven { url "http://repo.spring.io/libs-snapshot" url 'http://repo.spring.io/milestone' url 'http://repo.spring.io/libs-release' } mavenLocal() } dependencies { classpath (group: 'org.springframework.boot', name:'spring-boot-gradle-plugin', version: '1.1.1.RELEASE') } } apply plugin: 'java' apply plugin: 'eclipse' apply plugin: 'idea' apply plugin: 'spring-boot' 263
Chapter 19 ■ Spring Boot, Simplifying Everything jar { } baseName = 'ch19-spring-boot' version = '0.1.0' repositories { mavenCentral() maven { url "http://repo.spring.io/libs-snapshot" url 'http://repo.spring.io/milestone' url 'http://repo.spring.io/libs-release' } } dependencies { compile("org.springframework.boot:spring-boot-starter-web") { exclude module: "spring-boot-starter-tomcat" } compile("org.springframework.boot:spring-boot-starter-jetty") compile("org.springframework.boot:spring-boot-starter-actuator") compile("org.springframework.boot:spring-boot-starter-jdbc") } runtime 'hsqldb:hsqldb:1.8.0.10' testCompile("junit:junit") Listing 19-1 shows the build.gradle file. The important part of this file is where you describe the buildscript because you are going to use a spring-boot plug-in. The spring-boot plug-in has several tasks, one of which is the bootRun task. Don’t worry too much about these tasks; you are going to use them very soon. Remember that you still have all the My Documents classes from previous chapters. So let’s reuse them, including some persistence like the JDBC. And because Spring Boot promotes zero configuration files, you are going to use some Java Config classes, as shown in Listing 19-2. Listing 19-2. JDBCConfig.java package com.apress.isf.spring.boot; import javax.sql.DataSource; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.ImportResource; import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase; import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder; import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType; @Configuration @ImportResource("classpath:META-INF/spring/jdbc-context.xml") public class JDBCConfig { 264
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THE EXPERT’S VOICE ® IN SPRING
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Contents at a Glance About the Auth
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Introduction This book is an introd
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Part I Spring Framework Basics The
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Chapter 1 ■ Your First Spring App
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Chapter 2 ■ Working with Classes
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Chapter 3 Applying Different Config
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Chapter 3 ■ Applying Different Co
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Spring Stereotypes Chapter 3 ■ Ap
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Chapter 4 ■ Using Beans Scopes pu
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Chapter 4 ■ Using Beans Scopes Th
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Chapter 4 ■ Using Beans Scopes @A
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Chapter 4 ■ Using Beans Scopes do
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Chapter 5 ■ Working with Collecti
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Chapter 6 ■ Using Resource Files
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Chapter 7 Testing Your Spring Appli
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Chapter 7 ■ Testing Your Spring A
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Chapter 8 Give Advice to Your Sprin
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Chapter 8 ■ Give Advice to Your S
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Chapter 9 ■ Adding Persistence to
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Chapter 10 ■ Showing Your Spring
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Chapter 11 ■ Integrating Your Spr
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Chapter 12 Exposing a REST API Nowa
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Chapter 12 ■ Exposing a REST API
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HTTP-DELETE Chapter 12 ■ Exposing
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Chapter 13 Adding E-mail and Schedu
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Chapter 13 ■ Adding E-mail and Sc
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Part III Spring Framework Advanced
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Chapter 14 ■ Using Dynamic Langua
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Chapter 15 ■ Spring Data Within Y
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Installing RabbitMQ on Windows Appe
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Appendix A ■ Installing Tools Fig
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Installing Spring XD on Windows App
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■ index • I I/O operations, 62
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■ index Spring application (cont.
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Introducing Spring Framework A Prim
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To my parents, Rocio Cruz and Felip
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■ Contents ■■Chapter 3: Apply
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■ Contents ■■Chapter 12: Expo
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■ Contents ■■Chapter 20: Your
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About the Author Felipe Gutierrez i
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Acknowledgments I would like to exp
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Introducing Spring Framework

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