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How to configure listeners in deployment descriptor(web.xml)

Servlet specification supports http listeners which are explained in the tutorial on java servlets .

Listeners are configured in the deployment descriptor(web.xml) using the elements <listener> & <listener-class> as shown below.

<web-app>
        <listener>
            <listener-class>com.tf.MyListener</listener-class>
        </listener>
    </web-app>