4. The Web Module
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## 4. The Web Module

## 4.1 Introduction

In common with most Enterprise Java applications GreenPages uses a web-based interface for user interactions. The following steps show how the controller for the application is constructed, using a service from the OSGi Service Registry.

It is assumed that the instructions in Chapter 2, Installation have been followed already and that the GreenPages zip file has been downloaded and unzipped as described in Chapter 3, Installing and exploring GreenPages.

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3.5 Running GreenPages from Eclipse | Home | 4.2 GreenPages set up