WEB-INF/web.xml

<web-app xmlns="http://caucho.com/ns/resin">
  <!--
     - Instantiates the resource.
     -
     - The resource start(ctx) method registers a timer which periodically
     - starts a work task.
    -->
  <resource jndi-name="jca/timer" type="example.TimerResource"/>
</web-app>