The following <portlet-action> elements specify the action classes that are invoked when the user clicks OK and Cancel in the editor display page.

         <portlet-action name="ok" default="false">
            <type>sample.displayurl.OKAction</type>
         </portlet-action>

         <portlet-action name="cancel" default="false">
            <type>sample.displayurl.CancelAction</type>
         </portlet-action>

      </portlet-actions> 
   </local-portlet> 
</portlets>