server/filter/FilterThread.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.filter;

//---IMPORTS---
import java.io.*;
import java.net.*;
import java.util.*;
import uk.ac.ukc.iscream.core.*;
import uk.ac.ukc.iscream.filter.*;
import uk.ac.ukc.iscream.util.*;

/**
 * Handle an incoming UDP packet as a separate thread.
 *
 * @author  $Author: tdb1 $
 * @version $Id: FilterThread.java,v 1.10 2000/11/30 02:00:54 tdb1 Exp $
 */
public class FilterThread extends Thread{

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.10 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    // Class constructor. Obtains the byte[] from a DatagramPacket.
    public FilterThread(DatagramPacket packet, Filter parent){
        _parent = parent;
        _rawPacket = packet.getData();
        _logger.write(this.toString(), Logger.DEBUG, "created");
        
    }
    
    // Class constructor for passing XML Strings.
    public FilterThread(String xml, Filter parent){
        _parent = parent;
        _rawPacket = xml.getBytes();
        _logger.write(this.toString(), Logger.DEBUG, "created");
    }

//---PUBLIC METHODS---

    public void run(){
 
        // Get a string without any null characters in it.
        //  -- maybe String.trim() would be better here ?
        String xml = new String(_rawPacket);
        if (xml.indexOf(0) != -1) {
            xml = xml.substring(0, xml.indexOf(0));
        }
        else {
            xml = xml.substring(0, xml.length());
        }
        
        // Use my XMLPacketMaker to make an XMLPacket object.
        XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
        XMLPacket packet = xmlPacketMaker.createXMLPacket();
        
        _logger.write(this.toString(), Logger.DEBUG, "got data, filtering and passing to parent - " + packet.printAll());
        
        if (packet == null){
            // A null XML packet was returned - don't pass it on.
            _logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system.");
            return;
        }
        
        // Now do something with this XMLPacket!!!
        // .... let's try this...
        _parent.receiveXML(xml);
    
    }

    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

    Filter _parent;
    byte[] _rawPacket;
    Logger _logger = ReferenceManager.getInstance().getLogger();
    String _name = ReferenceManager.getInstance().getName();

//---STATIC ATTRIBUTES---

}
Revision:	1.11
Committed:	Thu Nov 30 02:38:09 2000 UTC (23 years, 5 months ago) by ajm
Branch:	MAIN
Changes since 1.10:	+4 -5 lines
Log Message:	Changed package structure uk.ac.ukc.iscream.refman and xml -> uk.ac.ukc.iscream.util
#	User	Rev	Content
1	tdb	1.8	//---PACKAGE DECLARATION---
2			package uk.ac.ukc.iscream.filter;
3
4			//---IMPORTS---
5	pjm2	1.1	import java.io.*;
6			import java.net.*;
7			import java.util.*;
8	pjm2	1.6	import uk.ac.ukc.iscream.core.*;
9	tdb	1.2	import uk.ac.ukc.iscream.filter.*;
10	ajm	1.11	import uk.ac.ukc.iscream.util.*;
11	pjm2	1.1
12	tdb	1.8	/**
13			* Handle an incoming UDP packet as a separate thread.
14			*
15	ajm	1.11	* @author $Author: tdb1 $
16			* @version $Id: FilterThread.java,v 1.10 2000/11/30 02:00:54 tdb1 Exp $
17	tdb	1.8	*/
18	tdb	1.2	public class FilterThread extends Thread{
19	pjm2	1.1
20	tdb	1.8	//---FINAL ATTRIBUTES---
21
22			/**
23			* The current CVS revision of this class
24			*/
25	ajm	1.11	public final String REVISION = "$Revision: 1.10 $";
26	tdb	1.8
27			//---STATIC METHODS---
28
29			//---CONSTRUCTORS---
30
31	pjm2	1.3	// Class constructor. Obtains the byte[] from a DatagramPacket.
32	tdb	1.10	public FilterThread(DatagramPacket packet, Filter parent){
33			_parent = parent;
34			_rawPacket = packet.getData();
35			_logger.write(this.toString(), Logger.DEBUG, "created");
36	ajm	1.9
37	pjm2	1.1	}
38
39	pjm2	1.3	// Class constructor for passing XML Strings.
40	tdb	1.10	public FilterThread(String xml, Filter parent){
41			_parent = parent;
42			_rawPacket = xml.getBytes();
43			_logger.write(this.toString(), Logger.DEBUG, "created");
44	pjm2	1.1	}
45	tdb	1.8
46			//---PUBLIC METHODS---
47
48	pjm2	1.1	public void run(){
49
50			// Get a string without any null characters in it.
51	tdb	1.10	// -- maybe String.trim() would be better here ?
52			String xml = new String(_rawPacket);
53	pjm2	1.3	if (xml.indexOf(0) != -1) {
54	tdb	1.2	xml = xml.substring(0, xml.indexOf(0));
55			}
56			else {
57			xml = xml.substring(0, xml.length());
58			}
59	ajm	1.9
60	pjm2	1.3	// Use my XMLPacketMaker to make an XMLPacket object.
61	tdb	1.10	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
62	pjm2	1.1	XMLPacket packet = xmlPacketMaker.createXMLPacket();
63	ajm	1.9
64	tdb	1.10	_logger.write(this.toString(), Logger.DEBUG, "got data, filtering and passing to parent - " + packet.printAll());
65	ajm	1.9
66	pjm2	1.1	if (packet == null){
67	pjm2	1.6	// A null XML packet was returned - don't pass it on.
68	tdb	1.10	_logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system.");
69	pjm2	1.1	return;
70			}
71	pjm2	1.6
72			// Now do something with this XMLPacket!!!
73			// .... let's try this...
74	tdb	1.10	_parent.receiveXML(xml);
75	pjm2	1.1
76			}
77	tdb	1.8
78			/**
79			* Overrides the {@link java.lang.Object#toString() Object.toString()}
80			* method to provide clean logging (every class should have this).
81			*
82			* @return the name of this class and its CVS revision
83			*/
84			public String toString() {
85	ajm	1.9	return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
86	tdb	1.8	}
87
88			//---PRIVATE METHODS---
89
90			//---ACCESSOR/MUTATOR METHODS---
91
92			//---ATTRIBUTES---
93
94	tdb	1.10	Filter _parent;
95			byte[] _rawPacket;
96			Logger _logger = ReferenceManager.getInstance().getLogger();
97			String _name = ReferenceManager.getInstance().getName();
98	tdb	1.8
99			//---STATIC ATTRIBUTES---
100
101	pjm2	1.1	}