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Web Application Architecture: Principles, Protocols and Practices, 2nd Edition by Rich Rosen, Leon Shklar

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Chapter 10. Web Application Primer 1: Struts and JSTL

IN THIS CHAPTER

  • Case Study: Virtual Realty Listing Service (VRLS)

  • Application requirements

  • Technology choices

  • Overview of Struts

  • Structure of the VRLS application

  • Design decisions

  • Enhancements

OBJECTIVES

  • Review the notion of a web application.

  • Use the VRLS case study to discuss the requirements gathering and application design processes.

  • Provide an overview of the Struts framework and examine the inner workings of a Struts application in the context of VRLS.

  • Explain the reasons behind application design decisions.

  • Propose enhancements to the VRLS application.

As we mentioned in Chapter 1, web applications are client–server applications that use a browser as their client program. However, web applications are not limited to the interactions between browsers and servers. Server-side application components can operate as "clients", interacting with back-end data sources such as databases, web services, and legacy systems. In multi-tier web applications, every set of adjacent tiers represents a pairing of a client and a server, and every intermediate tier may act as either a client or a server, depending on which of its neighbors it is interacting with. For example, just as the browser connects to the web server to make a request, the application component executing on the web server may connect to a business logic layer, acting as a client for that layer's services.

In the last few chapters, we have covered both client-side techniques and server-side ...

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