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.xml.*;

/**
 * Handle an incoming UDP packet as a separate thread.
 *
 * @author  $Author: tdb1 $
 * @version $Id: FilterThread.java,v 1.8 2000/11/29 19:26:00 tdb1 Exp $
 */
public class FilterThread extends Thread{

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.8 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

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

//---PUBLIC METHODS---

    public void run(){
 
        // Get a string without any null characters in it.
        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, logger);
        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;
    String _name;

//---STATIC ATTRIBUTES---

}
Revision:	1.9
Committed:	Wed Nov 29 21:27:39 2000 UTC (23 years, 5 months ago) by ajm
Branch:	MAIN
Changes since 1.8:	+17 -9 lines
Log Message:	Update for package move. Fixed bug in constructors.
#	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	tdb	1.8	import uk.ac.ukc.iscream.xml.*;
11	pjm2	1.1
12	tdb	1.8	/**
13			* Handle an incoming UDP packet as a separate thread.
14			*
15	ajm	1.9	* @author $Author: tdb1 $
16			* @version $Id: FilterThread.java,v 1.8 2000/11/29 19:26:00 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	1.9	public final String REVISION = "$Revision: 1.8 $";
26	tdb	1.8
27			//---STATIC METHODS---
28
29			//---CONSTRUCTORS---
30
31	pjm2	1.3	// Class constructor. Obtains the byte[] from a DatagramPacket.
32	ajm	1.9	public FilterThread(DatagramPacket packet, String name, Filter parent, Logger logger){
33			_name = name;
34	tdb	1.2	this.parent = parent;
35	pjm2	1.3	this.rawPacket = packet.getData();
36	pjm2	1.6	this.logger = logger;
37	ajm	1.9	logger.write(this.toString(), Logger.DEBUG, "created");
38
39	pjm2	1.1	}
40
41	pjm2	1.3	// Class constructor for passing XML Strings.
42	ajm	1.9	public FilterThread(String xml, String name, Filter parent, Logger logger){
43			_name = name;
44			this.logger = logger;
45	pjm2	1.3	this.parent = parent;
46			this.rawPacket = xml.getBytes();
47	ajm	1.9	logger.write(this.toString(), Logger.DEBUG, "created");
48	pjm2	1.1	}
49	tdb	1.8
50			//---PUBLIC METHODS---
51
52	pjm2	1.1	public void run(){
53
54			// Get a string without any null characters in it.
55			String xml = new String(rawPacket);
56	pjm2	1.3	if (xml.indexOf(0) != -1) {
57	tdb	1.2	xml = xml.substring(0, xml.indexOf(0));
58			}
59			else {
60			xml = xml.substring(0, xml.length());
61			}
62	ajm	1.9
63	pjm2	1.3	// Use my XMLPacketMaker to make an XMLPacket object.
64	pjm2	1.6	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml, logger);
65	pjm2	1.1	XMLPacket packet = xmlPacketMaker.createXMLPacket();
66	ajm	1.9
67			logger.write(this.toString(), Logger.DEBUG, "got data, filtering and passing to parent - " + packet.printAll());
68
69	pjm2	1.1	if (packet == null){
70	pjm2	1.6	// A null XML packet was returned - don't pass it on.
71			logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system.");
72	pjm2	1.1	return;
73			}
74	pjm2	1.6
75			// Now do something with this XMLPacket!!!
76			// .... let's try this...
77	tdb	1.2	parent.receiveXML(xml);
78	pjm2	1.1
79			}
80	tdb	1.8
81			/**
82			* Overrides the {@link java.lang.Object#toString() Object.toString()}
83			* method to provide clean logging (every class should have this).
84			*
85			* @return the name of this class and its CVS revision
86			*/
87			public String toString() {
88	ajm	1.9	return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
89	tdb	1.8	}
90
91			//---PRIVATE METHODS---
92
93			//---ACCESSOR/MUTATOR METHODS---
94
95			//---ATTRIBUTES---
96
97	tdb	1.2	Filter parent;
98	pjm2	1.1	byte[] rawPacket;
99	pjm2	1.5	Logger logger;
100	ajm	1.9	String _name;
101	tdb	1.8
102			//---STATIC ATTRIBUTES---
103
104	pjm2	1.1	}