server/XMLReader/UDPReader.java

import java.io.*;
import java.net.*;
import java.util.*;

// This class contains the main method to be run by
// the filter children.  It harvests UDP traffic
//
//
public class UDPReader {

    public static void main(String[] args) throws IOException {

        // default UDP listening port.
        int port = 4589;
        final int packetSizeLimit = 8192;

        // Allow the user to choose their own port number.
        if (args.length == 1){
            try {
                port = new Integer(args[0]).intValue();
            }
            catch (Exception e){
                // If something went wrong, use the default again.
                port = 4589;
            }
        }

        DatagramSocket socket = null;
        try {
            socket = new DatagramSocket(port);
        }
        catch (BindException e){
            System.out.println("Some other process is already listening on port "+port+".");
            System.out.println("Please specify another port number on the command line.");
            System.exit(0);
        }
        
        System.out.println("UDPReader ready and listening for UDP packets on port "+port);

        byte[] buf;
        UDPReaderThread t = new UDPReaderThread();
        
        boolean running = true;
        while (running){
            try {
                buf = new byte[packetSizeLimit];
                // receive request
                DatagramPacket packet = new DatagramPacket(buf, buf.length);
                socket.receive(packet);
                t.run(packet);
            }
            catch (IOException e) {
                System.out.println("An exception occured in the UDPReader!");
                e.printStackTrace();
            }
        }
        socket.close();
    }
}
Revision:	1.5
Committed:	Mon Nov 20 09:28:18 2000 UTC (24 years ago) by pjm2
Branch:	MAIN
Changes since 1.4:	+0 -1 lines
Log Message:	Removed the System.gc(); - no need for explicit GC.
#	User	Rev	Content
1	pjm2	1.1	import java.io.*;
2			import java.net.*;
3			import java.util.*;
4
5			// This class contains the main method to be run by
6			// the filter children. It harvests UDP traffic
7			//
8			//
9			public class UDPReader {
10
11			public static void main(String[] args) throws IOException {
12
13	pjm2	1.2	// default UDP listening port.
14			int port = 4589;
15			final int packetSizeLimit = 8192;
16	pjm2	1.1
17	pjm2	1.2	// Allow the user to choose their own port number.
18			if (args.length == 1){
19			try {
20			port = new Integer(args[0]).intValue();
21			}
22			catch (Exception e){
23			// If something went wrong, use the default again.
24			port = 4589;
25			}
26			}
27
28	pjm2	1.3	DatagramSocket socket = null;
29			try {
30			socket = new DatagramSocket(port);
31			}
32			catch (BindException e){
33			System.out.println("Some other process is already listening on port "+port+".");
34			System.out.println("Please specify another port number on the command line.");
35			System.exit(0);
36			}
37
38	pjm2	1.2	System.out.println("UDPReader ready and listening for UDP packets on port "+port);
39
40	pjm2	1.4	byte[] buf;
41			UDPReaderThread t = new UDPReaderThread();
42
43	pjm2	1.2	boolean running = true;
44			while (running){
45			try {
46	pjm2	1.4	buf = new byte[packetSizeLimit];
47	pjm2	1.1	// receive request
48	pjm2	1.2	DatagramPacket packet = new DatagramPacket(buf, buf.length);
49			socket.receive(packet);
50	pjm2	1.4	t.run(packet);
51	pjm2	1.2	}
52			catch (IOException e) {
53			System.out.println("An exception occured in the UDPReader!");
54			e.printStackTrace();
55			}
56	pjm2	1.1	}
57			socket.close();
58			}
59			}