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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/filter/FilterThread.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filter/FilterThread.java (file contents):
Revision 1.3 by pjm2, Thu Nov 23 09:08:07 2000 UTC vs.
Revision 1.15 by tdb, Fri Jan 12 00:45:25 2001 UTC

#	Line 1 | Line 1
1	+	//---PACKAGE DECLARATION---
2	+	package uk.ac.ukc.iscream.filter;
3	+
4	+	//---IMPORTS---
5		import java.io.*;
6		import java.net.*;
7		import java.util.*;
8	+	import uk.ac.ukc.iscream.core.*;
9		import uk.ac.ukc.iscream.filter.*;
10	+	import uk.ac.ukc.iscream.util.*;
11
12	<	// Handle an incoming UDP packet as a separate thread.
12	>	/**
13	>	* Handle an incoming packet as a separate thread.
14	>	* Passes the data through various plugins, then
15	>	* passes it on to the parent filter.
16	>	*
17	>	* Now grabs data from a single queue, rather than
18	>	* waiting to be contacted.
19	>	*
20	>	* @author  $Author$
21	>	* @version $Id$
22	>	*/
23		public class FilterThread extends Thread{
24
25	<	// Class constructor. Obtains the byte[] from a DatagramPacket.
26	<	public FilterThread(Filter parent, DatagramPacket packet){
27	<	this.parent = parent;
28	<	this.rawPacket = packet.getData();
29	<	}
25	>	//---FINAL ATTRIBUTES---
26	>
27	>	/**
28	>	* The current CVS revision of this class
29	>	*/
30	>	public final String REVISION = "$Revision$";
31
32	<	// Class constructor for passing XML Strings.
33	<	public FilterThread(Filter parent, String xml){
34	<	this.parent = parent;
35	<	this.rawPacket = xml.getBytes();
32	>	//---STATIC METHODS---
33	>
34	>	//---CONSTRUCTORS---
35	>
36	>	/**
37	>	* Class constructor.
38	>	*/
39	>	public FilterThread(Queue queue, Filter parent){
40	>	_parent = parent;
41	>	_queue = queue;
42	>	_logger.write(toString(), Logger.DEBUG, "created");
43		}
44	<
44	>
45	>	//---PUBLIC METHODS---
46	>
47	>	/**
48	>	* Runs the thread
49	>	*/
50		public void run(){
51	<
52	<	// Get a string without any null characters in it.
53	<	String xml = new String(rawPacket);
54	<	if (xml.indexOf(0) != -1) {
55	<	xml = xml.substring(0, xml.indexOf(0));
51	>	// get a queue for ourselves
52	>	int n = _queue.getQueue();
53	>	// keep this out here, saves recreating the object
54	>	String xml = null;
55	>	while(true) {
56	>	// get a String of xml
57	>	try {
58	>	xml = (String) _queue.get(n);
59	>	}
60	>	catch (InvalidQueueException e) {
61	>	_logger.write(toString(), Logger.ERROR, "Queue error: "+e);
62	>	}
63	>
64	>	// Get a string without any null characters in it.
65	>	//  -- maybe String.trim() would be better here ?
66	>	if (xml.indexOf(0) != -1) {
67	>	xml = xml.substring(0, xml.indexOf(0));
68	>	}
69	>	else {
70	>	xml = xml.substring(0, xml.length());
71	>	}
72	>
73	>	// Use XMLPacketMaker to make an XMLPacket object.
74	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
75	>	XMLPacket packet = xmlPacketMaker.createXMLPacket();
76	>
77	>	if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) {
78	>	// packet is not null
79	>	// packet was not dropped by a plugin
80	>	// ... best pass it on !
81	>	_parent.receiveXML(xml);
82	>	}
83	>	else {
84	>	// either we had a null, or a plugin dropped it
85	>	_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
86	>	}
87		}
88	<	else {
29	<	xml = xml.substring(0, xml.length());
30	<	}
31	<	System.out.println(xml);
88	>	}
89
90	<	// Use my XMLPacketMaker to make an XMLPacket object.
91	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
92	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
93	<
94	<	if (packet == null){
95	<	System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
96	<	return;
97	<	}
98	<	System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
99	<	packet.printAll();
100	<	// Now do something with this XMLPacket!!!
101	<	// .... let's try this...
102	<	parent.receiveXML(xml);
103	<
90	>	/**
91	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
92	>	* method to provide clean logging (every class should have this).
93	>	*
94	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
95	>	* to format the toString()
96	>	*
97	>	* @return the name of this class and its CVS revision
98	>	*/
99	>	public String toString() {
100	>	return FormatName.getName(
101	>	_name,
102	>	getClass().getName(),
103	>	REVISION);
104		}
105	+
106	+	//---PRIVATE METHODS---
107	+
108	+	//---ACCESSOR/MUTATOR METHODS---
109	+
110	+	//---ATTRIBUTES---
111	+
112	+	/**
113	+	* Our parent filter
114	+	*/
115	+	Filter _parent;
116
117	<	Filter parent;
118	<	byte[] rawPacket;
117	>	/**
118	>	* The Queue object
119	>	*/
120	>	Queue _queue;
121	>
122	>	/**
123	>	* This is the friendly identifier of the
124	>	* component this class is running in.
125	>	* eg, a Filter may be called "filter1",
126	>	* If this class does not have an owning
127	>	* component,  a name from the configuration
128	>	* can be placed here.  This name could also
129	>	* be changed to null for utility classes.
130	>	*/
131	>	private String _name = FilterMain.NAME;
132	>
133	>	/**
134	>	* This holds a reference to the
135	>	* system logger that is being used.
136	>	*/
137	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
138	>
139	>	//---STATIC ATTRIBUTES---
140	>
141		}

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