Sharing info among servlet, output right??

Question

hi everyone, i have written two servlet for sharing information, mean the information of one servlet can be shared by other. i have taken help from a book, but the desired output is not coming. can u please find what wrong with this 2 servlet.
This is the first servlet which will set the property of password to dingdong.
public class AttributeSetterServlet implements Servlet{
    public void init(ServletConfig config) throws ServletException{
        //bind object that is to be shared with other servlet
        ServletContext servletContext = config.getServletContext();
        servletContext.setAttribute("password", "dingdong");
    public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
    public void destroy(){
    public String getServletInfo(){
        return null;
    public ServletConfig getServletConfig(){
        return null;
}THis is the second servlet which will get the attribute value, but the desired output is not coming. it will display different output.
public class DisplayAttributeServlet implements Servlet {
    ServletConfig servletConfig;
    public void init(ServletConfig config) throws ServletException{
        servletConfig = config;
    public void destroy(){
    public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        ServletContext servletContext = servletConfig.getServletContext();
        Enumeration attributes = servletContext.getAttributeNames();
        while(attributes.hasMoreElements()){
            String attribute = (String) attributes.nextElement();
            out.println("Attribute name: " + attributes);
            out.println("\n");
            out.println("Attributes value: " + servletContext.getAttribute(attribute));
            out.println("\n");
    public String getServletInfo(){
        return null;
    public ServletConfig getServletConfig(){
        return null;
}

Answer 1

Ok I know that. Now what I meant is do I need to poll the server for new messages (still using the chat-app between midlets example) or can I make both midlets open a connection to the server and send their messages to the server, and have the server redirect the messages to the respective client-midlet. I'm thinking something like each client midlet opens a connection, sends stuff whenever it wants (on the server side, output streams are not closed until some special flag is set) and keeps listening for answers until the user quits or say some special char comes from the server.
The thing is I'm having some problems when I keep readStreams open after a while (inside a while loop waiting for some special code) and I was wondering if this is valid or is indeed a problem with my code.
This is what I meant with tunnel before, not really say raw socket comm between midlets but a tunnel through a server that nevertheless kept each midlet from having to poll the ditto all the time. Apologies for not being too clear about it.
I'm using something like (in pseudo pseudo-code & ommiting all the registration steps etc):
client midlets
conn = openConnection();
out = conn.getOutpuStream();
in = conn.getInputStream();
if (!postbox.isEmpty()) {
msg = removeHead(postbox);
out.writeStream( sendMessage(msg) );
... on a separate thread
while (USER_IS_ON){
msg = in.readStream();
if (msg != null) postbox.add(msg);
close(conn, out, in);
Server
out = request.getOutpuStream();
in = request.getInputStream();
data = in.readStream();
// write this guy's data on the other recipient's queue
queue.add(data, id);
... on a separate thread
while (USER_IS_ON){
// get data to this guy from queue
if (data = hasData(id) != null)
out.writeStream(data, id);
close(conn, out, in);
On fear of making this too long, I'll stop here. I can post the source if you wish but it is rather lenghty :-)
Thanks for the help!
cheers
j.