In order to enable the web service, please do the following steps

Step 1. Please attach the following to web.xml (web.xml can be found in web/WEB-INF folder).

<servlet>
<servlet-name>mat</servlet-name>
<description>mat</description>
<servlet-class>org.greenstone.gsdl3_extension.mat.servlet.MatServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>mat</servlet-name>
<url-pattern>/mat</url-pattern>
</servlet-mapping>

Step 2. Start web server. Done!