how to use RequestProcessor? 1

[jollyplay]

Hello

i heard that if we need to implement common code along action servlet, we can override processPreprocess method of RequestProcessor class. Could you please send me sample code or any link for the same and how to implement in our struts applicatin. Please do the needful.

Thank you.


Regards, balachandar

 

[venur]

Hi,

RequestProcessor contains the processing logic for every servlet request from the container. The best example would be to check does the user login and has the username in session.

**
 * User: vreddy
 * Date: Aug 5, 2005
 * Time: 9:46:48 AM
 *
 * @author Venu Reddy <a href="mailto:venu_dvmr@yahoo.com">Venu Reddy</a>
 */
public class TestRequestProcessor extends RequestProcessor {

    protected boolean processPreprocess(HttpServletRequest request,
                                        HttpServletResponse response) {
        HttpSession session = request.getSession(false);
        //If user is trying to access login page
        // then don't check
        if (request.getServletPath().equals("/loginInput.do")
                || request.getServletPath().equals("/login.do"))
            return true;
        //Check if userName attribute is there is session.
        //If so, it means user has allready logged in
        if (session != null &&
                session.getAttribute("userName") != null)
            return true;
        else {
            try {
                //If no redirect user to login Page
                request.getRequestDispatcher
                        ("/Login.jsp").forward(request, response);
            } catch (Exception ex) {
            }
        }
        return false;
    }

    protected void processContent(HttpServletRequest request,
                                  HttpServletResponse response) {
        super.processContent(request, response);
    }
}

And in the struts-config.xml the mapping would be under

<controller>
    <set-property property="processorClass" value="TestRequestProcessor"/>
  </controller>

Hope this will help you.. for more details google..

Cheers
Venu

 

[jollyplay]

Dean venu,

Thank you for your reply. i got good understanding about this.

Regards,
balachandar.