URL mapping in Tomcat to FrontController servlet

Question

I\'m trying to follow the pattern at Design Patterns web based applications. It all works fine part from when it comes to maping \"root\" URLs.

I\'d like to put all

Answer 1

You can extend the DefaultServlet of your web server.The extended servlet will be your front controller. In the doGET or doPOST method forward your static pages to the super class. DefaultServlet is the servlet that is mapped to url "/" by default. I have used it with jetty server but it can be implemented in tomcat as well.

public class FrontController extends DefaultServlet {

@Override
public void init() throws UnavailableException {
    super.init();
}

@Override
protected void doGet(HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {

    String uri = request.getRequestURI();

    /*
     * if request is trying to access inside /static then use the default
     * servlet. YOU CAN USE YOUR OWN BUSINESS LOGIC TO FORWARD REQUESTS 
     * TO DEFAULTSERVLET
     */
    if (uri.startsWith("/static/")) {

        super.doGet(request, response);
        return;
    } else {

        // else use your custom action handlers
    }
}

}

In the above code samples I have forwarded all the requests starting with /static/ to the default servlet to process. In this way you can map the FrontController to "/" level .

FrontController
FrontController
FrontController

FrontController
/