RE: Hi to everyone

Hi Don:

First at all, let me thank you a lot your answer.

I want to have the thinnest client as possible and a servlet making all the
jobs, and just sending the GIF image to the browser. I enclose you my source
code and you can find my try to change the scale in the method processMap:

Thanks for your help.

P.D: If you think the problem could be in my openmap.properties file I would
thank you a lot if you send me a correct one or if you specify the lines I
should have. Actually I am running with the one that comes with the package.

/*
 * openmapServlet.java
 *
 * Created on 31 de julio de 2002, 16:59
 */
 
import javax.servlet.*;
import javax.servlet.http.*;
import com.bbn.openmap.image.MapRequestHandler;
import java.util.Hashtable;
import java.util.Properties;
/**
 *
 * @author williamsleonidas
 * @version
 */
public class openmapServlet extends HttpServlet {
   
    static private Hashtable hsMaps;
    
    /** Initializes the servlet.
    */
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        hsMaps = new Hashtable();
    }

    /** Destroys the servlet.
    */
    public void destroy() {

    }

    private MapRequestHandler registerSession(HttpSession httpSes) throws
java.io.IOException{
        String szID = httpSes.getId();
        MapRequestHandler aux = (MapRequestHandler)hsMaps.get(szID);
        if(aux==null)
        {
            Properties props = new Properties();
 
props.load(ClassLoader.getSystemResourceAsStream("Mapas.properties"));
            aux = new MapRequestHandler(props);
            aux.setDefaultProjection(new com.bbn.openmap.proj.LLXY(new
com.bbn.openmap.LatLonPoint(0,0), new Float("2.0688352E8").floatValue(),
640, 480));
            hsMaps.put((String)szID, (MapRequestHandler)aux);
        }
        return aux;
    }
    
    private void getMap(HttpServletRequest request, HttpServletResponse
response)
    throws ServletException, java.io.IOException {
        MapRequestHandler map =
(MapRequestHandler)hsMaps.get((String)request.getSession().getId());
        response.setContentType("image/gif");
        System.out.println("Projection es: " +
map.getDefaultProjection().getProjectionID());
        System.out.println("Center es: " +
map.getDefaultProjection().getCenter());
        System.out.println("scale es: " +
map.getDefaultProjection().getScale());
        System.out.println("width es: " +
map.getDefaultProjection().getWidth());
        System.out.println("height es: " +
map.getDefaultProjection().getHeight());
 
response.getOutputStream().write(map.createImage(map.getDefaultProjection())
);
        response.flushBuffer();
    }
    
    private void processMap(HttpServletRequest request, HttpServletResponse
response)
    throws ServletException, java.io.IOException {
        MapRequestHandler map =
(MapRequestHandler)hsMaps.get((String)request.getSession().getId());

        com.bbn.openmap.proj.LLXY llxyAux =
(com.bbn.openmap.proj.LLXY)map.getDefaultProjection();
        llxyAux.setScale(llxyAux.getScale()-1000000);
        hsMaps.put((String)request.getSession().getId(),
(MapRequestHandler)map);
        response.sendRedirect("http://localhost:8080/gis/index.jsp");
    }
    
    /** Processes requests for both HTTP <code>GET</code> and
<code>POST</code> methods.
    * @param request servlet request
    * @param response servlet response
    */
    protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
    throws ServletException, java.io.IOException {
        MapRequestHandler map = (MapRequestHandler)
registerSession(request.getSession(true));
        String szAux = request.getParameter("map");
        if(szAux!=null)
            getMap(request, response);
        else
            processMap(request, response);
    }

    /** Handles the HTTP <code>GET</code> method.
    * @param request servlet request
    * @param response servlet response
    */
    protected void doGet(HttpServletRequest request, HttpServletResponse
response)
    throws ServletException, java.io.IOException {
        processRequest(request, response);
    }

    /** Handles the HTTP <code>POST</code> method.
    * @param request servlet request
    * @param response servlet response
    */
    protected void doPost(HttpServletRequest request, HttpServletResponse
response)
    throws ServletException, java.io.IOException {
        processRequest(request, response);
    }

    /** Returns a short description of the servlet.
    */
    public String getServletInfo() {
        return "Short description";
    }

}

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