Introducing Spring Framework

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