Introducing Spring Framework

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Chapter 19 ■ Spring Boot, Simplifying Everything Listing 19-9 shows the MyDocumentService class that will call the repository to access all of the data from the in-memory database. For now, you are only implementing it to retrieve the document records. Listing 19-10 shows the MyDocumentsController class, which is the RESTful calls entry class. You are implementing a single method just to prove that with Groovy it is even easier to create enterprise-ready applications. Now you need to create the main class that will be the bootstrap of the application. See Listing 19-11. Listing 19-11. app.groovy @Grab("org.hsqldb:hsqldb:2.2.9") @Grab("org.codehaus.groovy:groovy-sql:2.0.1") @Configuration class MyDocuments { //Extra configuration } beans { importBeans("jdbc.xml") } Listing 19-11 shows the MyDocuments class, which is the bootstrap for the Spring Boot application. The new Spring 4 provides support for a Spring DSL context, so in this script you are including it just to prove that you can actually use external configurations. The book’s companion source code contains all the scripts used in this section. Now how do you run it? You need to have Spring Boot installed. (For more information about how to install Spring Boot, see Appendix A.) From the command line, just execute the following command: spring run *.groovy This command will execute Spring Boot and it will automatically recognize what to do. Figure 19-3 shows the output of this command. 275
Chapter 19 ■ Spring Boot, Simplifying Everything Figure 19-3. Spring Boot with Groovy Now you can go to any browser and enter the http://localhost:8080/documents URL and you should get the same as shown in Figure 19-2. So how can you deploy the Spring Boot based on Groovy? It’s as simple as executing the following command: spring jar mydocuments.jar *.groovy This command will create an executable JAR that you can use with this command: java –jar mydocuments.jar Summary In this chapter you saw how to reuse the Java code and how Spring Boot can run this Spring application effortlessly. You saw how to deploy the application either creating an executable JAR or creating a WAR for deploying it to any Java web container. Also, you saw how it is even easier to create Spring applications with Groovy. In the next chapter, I’ll introduce to you to a new technology created by the Spring Framework team called Spring XD. 276
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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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Chapter 16 ■ Messaging with Your
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Chapter 16 ■ Messaging with Your
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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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