Professional Java for Web Applications

Chapter 14Using Services and Repositories to Support Your Controllers

IN THIS CHAPTER

• What is Model-View-Controller plus Controller-Service-Repository?
• Using the root application context instead of a web application context
• Enhancing services with asynchronous and scheduled execution
• Using logic layer separation with WebSockets

WROX.COM CODE DOWNLOADS FOR THIS CHAPTER

You can find the wrox.com code downloads for this chapter at http://www.wrox.com/go/projavaforwebapps on the Download Code tab. The code for this chapter is divided into the following major examples:

• Discussion-Board Project
• Customer-Support-v11 Project

NEW MAVEN DEPENDENCIES FOR THIS CHAPTER

In addition to the Maven dependencies introduced in previous chapters, you also need the following Maven dependencies:

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-websocket</artifactId>
            <version>4.0.2.RELEASE</version>
            <scope>compile</scope>
        </dependency>

UNDERSTANDING MODEL-VIEW-CONTROLLER PLUS CONTROLLER-SERVICE-REPOSITORY

In Chapter 13, you learned about the powerful tools available to you for replacing Servlets with Spring MVC controllers. You explored the Model-View-Controller (MVC) pattern as implemented in Spring Framework. By now, you’re probably quite familiar with the pattern in general, even if you had never seen it before. You may have already noticed a problem with this pattern, however. Despite its simplicities and the fact that controllers are cleaner than Servlets, your controller ...