topic = (Topic) initialContext.lookup("topic/topicViewBidHistory");
topic = (Topic) initialContext.lookup(Config.PrefixTopicName+"topicViewBidHistory");
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException  {    String  value = request.getParameter("itemId");    Integer itemId;        sp = new ServletPrinter(response, "ViewBidHistory");    if ((value == null) || (value.equals("")))    {      sp.printHTMLheader("RUBiS ERROR: View bids history");      sp.printHTML("<h3>You must provide an item identifier !<br></h3>");      sp.printHTMLfooter();      return ;    }    else      itemId = new Integer(value);    sp.printHTMLheader("RUBiS: Bid history");    try    {      initialContext = new InitialContext();    }     catch (Exception e)     {      printError("Cannot get initial context for JNDI: " + e+"<br>");      return ;    }    TopicConnectionFactory topicFactory = null;    TopicConnection connection = null;    TopicSession session  = null;    Topic topic = null;    String html;    try     {      // lookup the connection factory      topicFactory = (TopicConnectionFactory)initialContext.lookup(Config.TopicConnectionFactoryName);      // create a connection to the JMS provider      connection = topicFactory.createTopicConnection();      // lookup the destination      topic = (Topic) initialContext.lookup("topic/topicViewBidHistory");      // create a session      session  = connection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE); // no transaction and auto ack    }     catch (Exception e)    {      sp.printHTML("Cannot connect to message bean MDB_ViewBidHistory : " +e+"<br>");      return ;    }    try     {       // create a requestor to receive the reply      TopicRequestor requestor = new TopicRequestor(session, topic);      // create a message      MapMessage message = session.createMapMessage();      // set parameters      message.setInt("itemId", itemId.intValue());      message.setJMSCorrelationID("bidHistory");      // send the message and receive the reply      connection.start(); // allows message to be delivered (default is connection stopped)      TextMessage reply = (TextMessage)requestor.request(message);      connection.stop();      // read the reply      html = reply.getText();      // close connection and session      requestor.close(); // also close the session      connection.close();    }     catch (Exception e)    {      sp.printHTML("Cannot get bids history: " +e+"<br>");      return ;    }      sp.printHTML(html);    sp.printHTMLfooter();  }