How can i call java class implemented as service from ExtJS after successfull activation of a page ?

Hi ,

I want to call a java class implemented as a service in felix . This should be called after succesfull activation of the page .

I want to use ExtJs implemented in /libs/cq/ui/widgets/source/widgets/wcm/SiteAdmin.Actions.js file CQ.wcm.SiteAdmin.activatePage method.

Please suggest something on this .