Issues regarding Applet-Servlet communication

[hareesh Puthala]

can anyone helpme out please.................

Hi All................
I have few issues in our application development.
Can any one help me out if they are free.

problem is with the Applet Servlet communication.
...................................................................
In our application an applet is embeded in a jsp.
That applet when executed from a remote PC (client system) creates a text file(some bill will be generated eg:bill.txt) in the remote machine (eg. in the C: drive) and drives the local printer (default dot matrix printer) which is configured and connected to that remote macine and prints that text file.
Up to here it is working fine(creation of the file and printing the file using dot matrix printer).
After printing the file that applet needs to talk to servlet inorder to redirect the page to previous page.
Iam able to see(debug) the URL of the servlet within the java console and no exceptions are coming in the java console of the applet.
But the request is not reaching the servlet.
Servlet doesn't seem to get the object we are sending.
None of the debug messages in the Servlet appear on the server console.

Servlet code:
-------------------------------------------------

package
com.spdcl.prprint.controller; 
import
java.io.IOException; 
import
java.io.InputStream; 
import
java.io.ObjectInputStream; 
import
javax.servlet.RequestDispatcher; 
import
javax.servlet.ServletException; 
import
javax.servlet.http.HttpServlet; 
import
javax.servlet.http.HttpServletRequest; 
import
javax.servlet.http.HttpServletResponse; 
public
class AppletListnerServlet extends HttpServlet { 
private static final long serialVersionUID = 1L; 
public void doPost(HttpServletRequest request, HttpServletResponse response) 
throws ServletException, IOException { 
System.
out.println("firstghjfjfj"); 
String redirecturl = 
null; 
RequestDispatcher rd = 
null; 
String FORWARD = 
null; 
try { 
response.setContentType(
"application/x-java-serialized-object"); 
InputStream in = request.getInputStream();
ObjectInputStream inputFromApplet = 
new ObjectInputStream(in); 
redirecturl = (String) inputFromApplet.readObject();
System.
out.println("Inside Appletservlet:" + redirecturl); 
FORWARD = redirecturl;
} 
catch (Exception e) { 
//error page code
}
rd = getServletContext().getRequestDispatcher(FORWARD);
rd.forward(request, response);
}
}
Applet code:
-------------------------------------------------
Calling the onSendData()   from actionPerformed method of the applet
 
@SuppressWarnings("unused")
private URLConnection getServletConnection() throws MalformedURLException, 
IOException {
System.
out 
.println(
"inside getservconnection Codebase:" + getCodeBase()); 
URL urlServlet = 
new URL(getCodeBase().toString().concat( 
"AppletListnerServlet")); 
URLConnection con = urlServlet.openConnection();
System.
out.println("inside getservconnection for con:" + con); 
con.setDoInput(
true); 
con.setDoOutput(
true); 
con.setUseCaches(
false); 
con.setRequestProperty(
"Content-Type", 
"application/x-java-serialized-object"); 
return con; 
}
private void onSendData() { 
try { 
System.
out.println("Inside onsendDate:"); 
URLConnection con = getServletConnection();
System.
out.println("con in onsenddata:" + con); 
OutputStream outstream = con.getOutputStream();
ObjectOutputStream oos = 
new ObjectOutputStream(outstream); 
System.
out.println("stringurl val in onsenddATA:" + stringurl); 
oos.writeObject(
stringurl); 
oos.flush();
oos.close();
} 
catch (Exception ex) { 
ex.printStackTrace();
}
}

Thanks in Advance...

Plzzz help me out...

[hareesh Puthala]

Iam really very sorry..

Small correction
onSendData() and getConnection() methods arein the applet in my previous post..

[Ulf Dittmer]

Welcome to JavaRanch.

You can edit your post by using the button. When you do that, please also make sure that you UseCodeTags and that your code appears properly indented; it's unnecessarily hard to try and make sense of it otherwise.

[hareesh Puthala]

Issue still pending with the Applet-Servlet communication.........
Any help would be appreciated..
Please ASAP
THANKS IN ADVANCE

[Ulf Dittmer]

Does the code look more readable to you? Do you really not indent code?

[hareesh Puthala]

Now that my Applet is able to talk to servlet.
I am able to see the System.out.println() 's with in my Servlet.
But with in my servlet,when i try to redirect it to some page it is not doing that.
Can youlook into this Ulf Dittmer
or
Can anyone help me out please...

[sajjad ahmad]

I recently had some trouble in Applet servlet communication , in my case I found that Applet was not sending JSESSIONID back to servlet and because of that servlet was not able to get the appropriate session. I resolved the problem by making sure that JSESSIONID is always being passed from applet to servlet.
For more details you can view my blog.

http://javaiscoool.blogspot.com/2011/05/appletswingflexj2me-to-servlet.html

I hope it works for you as well.

Thanks.
Sajjad Paracha