/route.xml?from_lat=48.2&from_lon=52.7&...

gistfile1.txt

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class RoutingServlet extends HttpServlet {

  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    String start_lat = request.getParameter("start_lat");
    String start_lon = request.getParameter("start_lon");
    String battery_level = request.getParameter("battery_level");
    ...

    String xml = createRoutingResponseXMLString(start_lat, start_lon, battery_level..)
    response.getWriter.println(xml);

  }
}