Servlet - show message while getting data

Question

Hello,
I have a servlet that is getting some data in form of an String from another server. This is taking some time, so I would like to show a "Please wait" message in between.
My problem is, that when I flush the message with my servlet and flush then the result of the query from the other server, the message is still visible.
So ist there a way to overwrite the first flushed output? Or some other way to show some short message before a result page?
Below is my code so far. I curently flush only the result without the message.
Thanks in advance!
package de.gfz.userinterface.httpclient;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.PostMethod;
public class ClientPostServlet extends HttpServlet
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException
    HttpClient httpClient = new HttpClient();
    //Url f�r den PostRequest setzen (kommt aus LoginWorkflow.xml Datei bei SCIENTIST)
    String url = String.valueOf(request.getAttribute("viewUri"));
    PostMethod postMethod = new PostMethod
         url
    //Attribute aus dem Request rausholen und als NameValuePair f�r den sp�teren Post Request setzen
    ArrayList<NameValuePair> postData = new ArrayList<NameValuePair>();
    Enumeration requestAttributeNames = request.getAttributeNames();
    while (requestAttributeNames.hasMoreElements())
         String requestAttributeName = (String) requestAttributeNames.nextElement();
         String attribut = String.valueOf(request.getAttribute(requestAttributeName));
         postData.add(new NameValuePair(requestAttributeName, attribut));
         //Attribute sicherheitshalber aus dem Request entfernen
         request.removeAttribute(requestAttributeName);
    //ArrayList in Array �bertragen
    NameValuePair[] postDataArray = new NameValuePair[postData.size()];
    for (int i = 0; i < postDataArray.length; i++)
          postDataArray[i] = postData.get(i);
     //the 2.0 beta1 version has a PostMethod.setRequestBody(NameValuePair[])
     //method, as addParameters is deprecated
    //Attribute in den Post Request setzen
    postMethod.setRequestBody(postDataArray);
    //Post Request senden
    httpClient.executeMethod(postMethod);
    //Ergebnis verarbeiten
    BufferedReader in = new BufferedReader(new InputStreamReader(postMethod.getResponseBodyAsStream()));
    String zeile = "";
    StringBuffer ergebnis = new StringBuffer();
    while ((zeile = in.readLine()) != null)
         ergebnis.append(zeile);
     //release the connection used by the method
    postMethod.releaseConnection();
    //String Buffer in String umwandeln
    String ergebnisString = ergebnis.toString();
    //css-Datei Position ver�ndern
    ergebnisString = ergebnisString.replaceFirst("AnzeigeModell/css/layout.css", "../css/layout.css");
    //display the response to the POST method
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    out.print(ergebnisString);
    out.flush();
  public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, java.io.IOException {
    doPost(request,response);
  }

Answer 1

Hi,
Please do the consistency check on target ODS by using the transaction RSRV.
RSRV->Tests in Transaction RSRV ->All Elementary Tests ->ODS Objects -> double click on "Foreign Key Relationship of Reporting-Relevant ODS Object and SID Table Characteristics" and also on "Check the Status of the Generated Program of a Data Store Object ".
These two will be shifted to the right hand side.
Then expand the recently shifted checks and they will ask for ODS technical names. Provide the same and click on transfer. After giving in both, click execute. After successfull execution, try to load the data again. If this check fails, there would be a tab on the screen to correct the error "Correct Error".
Click on the same and it will correct the error and then load the data.
Hope this solves your problem...