> 1) Is it technically possible? Yes > 2) If yes, what are the changes needs to be done for this regard? Add the Struts 2 jars and add a filter to web.xml for .action like you would do for a stand-alone Struts 2 web app.
> 3) Is there any documentation available explaining such implementation or related to this? Just create Struts 2 pages for the new pages you want to create. Same as any Struts 2 web app.