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  $Author$
 * @version $Id$
 */
public class FilterThread extends Thread{

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.1 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

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

//---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());
        }
        //System.out.println(xml);

        // Use my XMLPacketMaker to make an XMLPacket object.
        XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml, logger);
        XMLPacket packet = xmlPacketMaker.createXMLPacket();
 
        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() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
    }

//---PRIVATE METHODS---

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

//---ATTRIBUTES---

    Filter parent;
    byte[] rawPacket;
    Logger logger;

//---STATIC ATTRIBUTES---

}
Revision:	1.8
Committed:	Wed Nov 29 19:26:00 2000 UTC (23 years, 5 months ago) by tdb
Branch:	MAIN
Changes since 1.7:	+45 -3 lines
Log Message:	Made changes to fit into the new package structure. Also made all classes, namely the UDPReader and FilterThread, conform to the Template class specification.
#	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			* @author $Author$
16			* @version $Id$
17			*/
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			public final String REVISION = "$Revision: 1.1 $";
26
27			//---STATIC METHODS---
28
29			//---CONSTRUCTORS---
30
31	pjm2	1.3	// Class constructor. Obtains the byte[] from a DatagramPacket.
32	pjm2	1.5	public FilterThread(DatagramPacket packet, Filter parent, Logger logger){
33	tdb	1.2	this.parent = parent;
34	pjm2	1.3	this.rawPacket = packet.getData();
35	pjm2	1.6	this.logger = logger;
36	pjm2	1.1	}
37
38	pjm2	1.3	// Class constructor for passing XML Strings.
39	pjm2	1.5	public FilterThread(String xml, Filter parent, Logger logger){
40	pjm2	1.3	this.parent = parent;
41			this.rawPacket = xml.getBytes();
42	pjm2	1.1	}
43	tdb	1.8
44			//---PUBLIC METHODS---
45
46	pjm2	1.1	public void run(){
47
48			// Get a string without any null characters in it.
49			String xml = new String(rawPacket);
50	pjm2	1.3	if (xml.indexOf(0) != -1) {
51	tdb	1.2	xml = xml.substring(0, xml.indexOf(0));
52			}
53			else {
54			xml = xml.substring(0, xml.length());
55			}
56	tdb	1.7	//System.out.println(xml);
57	pjm2	1.1
58	pjm2	1.3	// Use my XMLPacketMaker to make an XMLPacket object.
59	pjm2	1.6	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml, logger);
60	pjm2	1.1	XMLPacket packet = xmlPacketMaker.createXMLPacket();
61
62			if (packet == null){
63	pjm2	1.6	// A null XML packet was returned - don't pass it on.
64			logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system.");
65	pjm2	1.1	return;
66			}
67	pjm2	1.6
68			// Now do something with this XMLPacket!!!
69			// .... let's try this...
70	tdb	1.2	parent.receiveXML(xml);
71	pjm2	1.1
72			}
73	tdb	1.8
74			/**
75			* Overrides the {@link java.lang.Object#toString() Object.toString()}
76			* method to provide clean logging (every class should have this).
77			*
78			* @return the name of this class and its CVS revision
79			*/
80			public String toString() {
81			return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
82			}
83
84			//---PRIVATE METHODS---
85
86			//---ACCESSOR/MUTATOR METHODS---
87
88			//---ATTRIBUTES---
89
90	tdb	1.2	Filter parent;
91	pjm2	1.1	byte[] rawPacket;
92	pjm2	1.5	Logger logger;
93	tdb	1.8
94			//---STATIC ATTRIBUTES---
95
96	pjm2	1.1	}