Need Help on JAVA API

[Anonymous]

Hi,

I am a new user of CUPS. I have written a small cups program in java using cups. jar , sending a print file to CUPS installed in Linux.
When I run the program on the same Linux box, it works fine.

When I run the same program on another Linux or Windows box, it gives socket error in getting printers. This error is not consistant.

I have tried setting client conf file and cupsd conf file as per documentation but I am not able to resolve this error.

Please let me know how to solve this problem.

My program code is as follows:



import java.io.*;
import org.cups.*;
public class WorkerSpooler {
	public static void main (String args[])
	{
		WorkerSpooler ws = new WorkerSpooler();
		ws.GetPrinterNames();

		ws.GetPrinters();
	}
	private void GetPrinterNames()
	{
		URL u1 = null;
		Cups cups1 = null;
		try
		{

		  u1 = new URL("http://10.65.1.32:631/printers/");
		  cups = new Cups(u1);
		  cups.setUser(ApplicationConstants.USER_NAME);
		  cups.setPasswd(ApplicationConstants.PASSWORD);
		  String str = cupsNo.toString();

		  cups.setInstance(str);
		  cupsNo = new Integer(cupsNo.intValue()+1);

		  //cups1.setProtocol("http");

		  printer_names = cups.cupsGetPrinters();
		 //printer_names = cups.cupsGetDefault(); //This always works. I always get the default printer.
		  System.out.println("Got printers");
		  if (printer_names != null)
		    num_printers  = printer_names.length;
		  else
		    num_printers = 0;
		  cups1 = null;
		  u1 = null;

		}
		catch (IOException e)
		{
			e.printStackTrace();
		  return;
		}
	}
	private void GetPrinters()
	{
		printers = new CupsPrinter[num_printers];

		for (int i=0; i < num_printers; i++)
		{
		  try
		  {
		    printers[i] = new CupsPrinter( cups, printer_names[i] );
		    System.out.println("Default Printer"+i+":  "+printers[i].getPrinterName());
		  }
		  catch (IOException e)
		  {
			System.out.println("Exception Getting printers");
			e.printStackTrace();
		     return;
		  }
		}
	}
}