server/XMLReader/UDPReaderThread.java

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

public class UDPReaderThread extends Thread{

    public UDPReaderThread(){
        // no-args constructor.
    }
    
    public void run(DatagramPacket packet){
        rawPacket = packet.getData();
        run();
    }
    
    public void run(){
 
        // Get a string without any null characters in it.
        String xml = new String(rawPacket);
        xml = xml.substring(0, xml.indexOf(0));

        // USe my XMLPacketMaker to make an XMLPacket object.
        XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
        XMLPacket packet = xmlPacketMaker.createXMLPacket();
 
        if (packet == null){
            System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
            return;
        }
        System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
        packet.printAll();
        // Now do something with this XMLPacket!!!
        // .... but what? ;-)
    
    }
    
    byte[] rawPacket;
}
Revision:	1.5
Committed:	Fri Nov 17 20:44:31 2000 UTC (24 years ago) by pjm2
Branch:	MAIN
Changes since 1.4:	+8 -8 lines
Log Message:	UDPReader and UDPReaderThread have been altered to prevent a serious problem whereby the system ran out of free memory after a certain amount of UDP packets had been received. Testing with XMLSender2 has revealed that this problem has been solved. There is now little chance of the UDPReader rejecting packets as it queues each arrival straight to the UDPReaderThread, thus making "event storms" managable. In fact, the queuing nature may even assist in quenching such problems.
#	User	Rev	Content
1	pjm2	1.1	import java.io.*;
2			import java.net.*;
3			import java.util.*;
4
5			public class UDPReaderThread extends Thread{
6
7	pjm2	1.5	public UDPReaderThread(){
8			// no-args constructor.
9			}
10
11			public void run(DatagramPacket packet){
12			rawPacket = packet.getData();
13			run();
14	pjm2	1.1	}
15
16			public void run(){
17	pjm2	1.2
18	pjm2	1.4	// Get a string without any null characters in it.
19	pjm2	1.3	String xml = new String(rawPacket);
20			xml = xml.substring(0, xml.indexOf(0));
21
22	pjm2	1.4	// USe my XMLPacketMaker to make an XMLPacket object.
23	pjm2	1.1	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
24			XMLPacket packet = xmlPacketMaker.createXMLPacket();
25	pjm2	1.2
26			if (packet == null){
27			System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
28			return;
29			}
30			System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
31			packet.printAll();
32			// Now do something with this XMLPacket!!!
33	pjm2	1.4	// .... but what? ;-)
34	pjm2	1.5
35	pjm2	1.1	}
36
37	pjm2	1.3	byte[] rawPacket;
38	pjm2	1.1	}