Writting confirmation message??

[Bikash Paul]

Hi all friends,
I am developing one uploading software it is a total automatic process of uploading user only copy the files in predefind folder and click on upload button once and my software starts uploading one by one from queue and move the file one by one into another folder automatically after completion of uploading.After that in between uploading if user copy more files in that folder my software automatically takes those file for uploading not require to click on upload button again.Now I am facing problem on writing confirmation message of uploading of every file on my swing interface which my servlet writing on PrintStream after completion of writing of every file on destination.But my interafce not writing those confirmation messages on textArea but it is writing confirmation message of last file on Dos-Prompt coz iam running my application from Dos-prompt.I want to write every file's uploading confirmation message on textArea of my swing application.Can any one plz guide me how I can do that.Below r my codes:-
swing application(Iam pasting those portion only):-

class Loglater implements Runnable { 
String msg; 
public Loglater(String s) { msg = s; }; 
public void run() { log(msg); } 
} 
public void log(String msg) { 
if (SwingUtilities.isEventDispatchThread()) { 
textArea.append(msg); 
textArea.append("\n"); 
System.err.println(msg); 
} 
else { 
SwingUtilities.invokeLater(new Loglater(msg)); 
} 
return; 
} 

servlet:-

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

public class RecvFileServlet extends HttpServlet { 
String s,str,str1,filename,path;

public void init() throws ServletException { 
super.init(); 
baseFile = new File(BASE_DIR);
str="false";
str1="false";
} 
public void doGet(HttpServletRequest request, HttpServletResponse response) 
throws ServletException, IOException 
{ 
response.sendError(response.SC_NOT_ACCEPTABLE, "Must use POST method."); 
} 

public void doPost(HttpServletRequest request,HttpServletResponse response) 
throws ServletException, IOException 
{
PrintStream pos = new PrintStream(response.getOutputStream()); 
response.setContentType("text/plain"); 
 
filename = request.getParameter("name"); 
path = request.getParameter("path");
 
File outfile = new File(filename);
System.out.println("path value = " + ((path == null)?("null") :(  path))); 
System.out.println("name value = " + ((filename == null)?("null") :(  filename))); 
if (path != null && filename != null) {
outfile = new File(path, filename); 
System.err.println("Final output file: " + 
outfile.getAbsolutePath()); 
} 
// create a DataInputStream to read from sender 
DataInputStream dis; 
dis = new DataInputStream(request.getInputStream()); 
OutputStream os; 
// create file output stream to write the output file 
System.err.println("Using output file " + outfile); 
os = new BufferedOutputStream(new FileOutputStream(outfile)); 
int cc; 
byte [] buf = new byte[1024]; 
long tot = 0; 
// read from the input stream and write to the file 
try { 
for(cc = dis.read(buf, 0, 1024);cc > 0 ; cc = dis.read(buf, 0, 1024)) 
{ 
os.write(buf, 0, cc);
tot += cc;
System.err.print("+" + cc + "(" + tot + ")");  
} 
} 
catch (IOException ie) { 
try { os.close(); } catch (Exception e2) { } 
pos.println("Problem : " + ie.getMessage()); 
} 
// done reading and writing, close the file output stream 
System.err.println("Write" + tot + " bytes."); 
os.close(); 
// Send back a response message to the application  
pos.println("File" +" "+ filename+" "+"Upload Completed !");
} 
}

Regards
Bikash

[Chantal Ackermann]

hi,
your Loglater class is broken, I think. you should not instantiate a Thread from inside itself. this looks like a loop. separate the controll from the logging functionality:

public class GUILog
{
   private String message = "";
   private final Runnable postMessage;
   public GUILog(JTextArea textArea)
   {
      postMessage = new Runnable()
      {
         textArea.append(message);
      }
   }
   public void append(String message)
   {
      this.message = message;
      if (SwingUtilities.isEventDispatchThread())
      {
          SwingUtilities.invokeAndWait(postMessage);
      }
      else
      {
         postMessage.run();
      }
   }
}

actually, as logging need not be necessarily sync you can use SwingUtilities.invokeLater() in any case. which saves you from checking for the event thread.
cheers,
Chantal
[ May 14, 2003: Message edited by: Chantal Ackermann ]

[Bikash Paul]

Hi,
I tried to complie ur given class but it is giving me compilation error(Identifier Excepted) on below line:-

postMessage = new Runnable()
      {         
       >>> textArea.append(message);
      }   

Can u plz guide me why it is giving me error.
Regards
Bikash

[Manish Hatwalne]

Originally posted by Bikash Paul:
Hi,
I tried to complie ur given class but it is giving me compilation error(Identifier Excepted) on below line:-

postMessage = new Runnable()
      {         
       >>> textArea.append(message);
      }   

Can u plz guide me why it is giving me error.
Regards
Bikash

It Should be -

postMessage = new Runnable()
      {         
        public void run()
        {
             textArea.append(message);
        }
      };   

HTH,
- Manish