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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 1.17 by tdb, Thu Jan 18 23:16:21 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.componentmanager.*;
10		import uk.ac.ukc.iscream.filter.*;
11	+	import uk.ac.ukc.iscream.util.*;
12
13	<	// Handle an incoming UDP packet as a separate thread.
13	>	/**
14	>	* Handle an incoming packet as a separate thread.
15	>	* Passes the data through various plugins, then
16	>	* passes it on to the parent filter.
17	>	*
18	>	* Now grabs data from a single queue, rather than
19	>	* waiting to be contacted.
20	>	*
21	>	* @author  $Author$
22	>	* @version $Id$
23	>	*/
24		public class FilterThread extends Thread{
25
26	<	// Class constructor. Obtains the byte[] from a DatagramPacket.
27	<	public FilterThread(Filter parent, DatagramPacket packet){
28	<	this.parent = parent;
29	<	this.rawPacket = packet.getData();
30	<	}
26	>	//---FINAL ATTRIBUTES---
27	>
28	>	/**
29	>	* The current CVS revision of this class
30	>	*/
31	>	public final String REVISION = "$Revision$";
32
33	<	// Class constructor for passing XML Strings.
34	<	public FilterThread(Filter parent, String xml){
35	<	this.parent = parent;
36	<	this.rawPacket = xml.getBytes();
33	>	//---STATIC METHODS---
34	>
35	>	//---CONSTRUCTORS---
36	>
37	>	/**
38	>	* Class constructor.
39	>	*/
40	>	public FilterThread(Queue queue, Filter parent){
41	>	_parent = parent;
42	>	_queue = queue;
43	>	_logger.write(toString(), Logger.DEBUG, "created");
44		}
45	<
45	>
46	>	//---PUBLIC METHODS---
47	>
48	>	/**
49	>	* Runs the thread
50	>	*/
51		public void run(){
52	<
53	<	// Get a string without any null characters in it.
54	<	String xml = new String(rawPacket);
55	<	if (xml.indexOf(0) != -1) {
56	<	xml = xml.substring(0, xml.indexOf(0));
52	>	// get a queue for ourselves
53	>	int n = _queue.getQueue();
54	>	// keep these out here, saves recreating the object
55	>	String xml = null;
56	>	while(true) {
57	>	// get a String of xml
58	>	try {
59	>	xml = (String) _queue.get(n);
60	>	}
61	>	catch (InvalidQueueException e) {
62	>	_logger.write(toString(), Logger.ERROR, "Queue error: "+e);
63	>	}
64	>
65	>	// Get a string without any null characters in it.
66	>	//  -- maybe String.trim() would be better here ?
67	>	if (xml.indexOf(0) != -1) {
68	>	xml = xml.substring(0, xml.indexOf(0));
69	>	}
70	>	else {
71	>	xml = xml.substring(0, xml.length());
72	>	}
73	>
74	>
75	>	// Bundle the XML all on one line (saves space and simplifies
76	>	// the protocol between clientinterface and client.
77	>	StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n");
78	>	xml = "";
79	>	while (tokenizer.hasMoreTokens()) {
80	>	xml += tokenizer.nextToken();
81	>	}
82	>
83	>
84	>	// Use XMLPacketMaker to make an XMLPacket object.
85	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
86	>	XMLPacket packet = xmlPacketMaker.createXMLPacket();
87	>
88	>	if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) {
89	>	// packet is not null
90	>	// packet was not dropped by a plugin
91	>	// ... best pass it on !
92	>	_parent.receiveXML(xml);
93	>	}
94	>	else {
95	>	// either we had a null, or a plugin dropped it
96	>	_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
97	>	}
98		}
99	<	else {
29	<	xml = xml.substring(0, xml.length());
30	<	}
31	<	System.out.println(xml);
99	>	}
100
101	<	// Use my XMLPacketMaker to make an XMLPacket object.
102	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
103	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
104	<
105	<	if (packet == null){
106	<	System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
107	<	return;
108	<	}
109	<	System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
110	<	packet.printAll();
111	<	// Now do something with this XMLPacket!!!
112	<	// .... let's try this...
113	<	parent.receiveXML(xml);
114	<
101	>	/**
102	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
103	>	* method to provide clean logging (every class should have this).
104	>	*
105	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
106	>	* to format the toString()
107	>	*
108	>	* @return the name of this class and its CVS revision
109	>	*/
110	>	public String toString() {
111	>	return FormatName.getName(
112	>	_name,
113	>	getClass().getName(),
114	>	REVISION);
115		}
116	+
117	+	//---PRIVATE METHODS---
118	+
119	+	//---ACCESSOR/MUTATOR METHODS---
120	+
121	+	//---ATTRIBUTES---
122	+
123	+	/**
124	+	* Our parent filter
125	+	*/
126	+	Filter _parent;
127
128	<	Filter parent;
129	<	byte[] rawPacket;
128	>	/**
129	>	* The Queue object
130	>	*/
131	>	Queue _queue;
132	>
133	>	/**
134	>	* This is the friendly identifier of the
135	>	* component this class is running in.
136	>	* eg, a Filter may be called "filter1",
137	>	* If this class does not have an owning
138	>	* component,  a name from the configuration
139	>	* can be placed here.  This name could also
140	>	* be changed to null for utility classes.
141	>	*/
142	>	private String _name = FilterMain.NAME;
143	>
144	>	/**
145	>	* This holds a reference to the
146	>	* system logger that is being used.
147	>	*/
148	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
149	>
150	>	//---STATIC ATTRIBUTES---
151	>
152		}

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