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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 1.7 by tdb, Mon Nov 27 21:47:13 2000 UTC vs.
Revision 1.16 by pjm2, Mon Jan 15 10:09:49 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(DatagramPacket packet, Filter parent, Logger logger){
27	<	this.parent = parent;
28	<	this.rawPacket = packet.getData();
29	<	this.logger = logger;
30	<	}
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(String xml, Filter parent, Logger logger){
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 these 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	>
74	>	// Bundle the XML all on one line (saves space and simplifies
75	>	// the protocol between clientinterface and client.
76	>	StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n");
77	>	xml = "";
78	>	while (tokenizer.hasMoreTokens()) {
79	>	xml += tokenizer.nextToken();
80	>	}
81	>
82	>
83	>	// Use XMLPacketMaker to make an XMLPacket object.
84	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
85	>	XMLPacket packet = xmlPacketMaker.createXMLPacket();
86	>
87	>	if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) {
88	>	// packet is not null
89	>	// packet was not dropped by a plugin
90	>	// ... best pass it on !
91	>	_parent.receiveXML(xml);
92	>	}
93	>	else {
94	>	// either we had a null, or a plugin dropped it
95	>	_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
96	>	}
97		}
98	<	else {
31	<	xml = xml.substring(0, xml.length());
32	<	}
33	<	//System.out.println(xml);
98	>	}
99
100	<	// Use my XMLPacketMaker to make an XMLPacket object.
101	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml, logger);
102	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
103	<
104	<	if (packet == null){
105	<	// A null XML packet was returned - don't pass it on.
106	<	logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system.");
107	<	return;
108	<	}
109	<
110	<	// Now do something with this XMLPacket!!!
111	<	// .... let's try this...
112	<	parent.receiveXML(xml);
113	<
100	>	/**
101	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
102	>	* method to provide clean logging (every class should have this).
103	>	*
104	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
105	>	* to format the toString()
106	>	*
107	>	* @return the name of this class and its CVS revision
108	>	*/
109	>	public String toString() {
110	>	return FormatName.getName(
111	>	_name,
112	>	getClass().getName(),
113	>	REVISION);
114		}
115	+
116	+	//---PRIVATE METHODS---
117	+
118	+	//---ACCESSOR/MUTATOR METHODS---
119	+
120	+	//---ATTRIBUTES---
121	+
122	+	/**
123	+	* Our parent filter
124	+	*/
125	+	Filter _parent;
126
127	<	Filter parent;
128	<	byte[] rawPacket;
129	<	Logger logger;
127	>	/**
128	>	* The Queue object
129	>	*/
130	>	Queue _queue;
131	>
132	>	/**
133	>	* This is the friendly identifier of the
134	>	* component this class is running in.
135	>	* eg, a Filter may be called "filter1",
136	>	* If this class does not have an owning
137	>	* component,  a name from the configuration
138	>	* can be placed here.  This name could also
139	>	* be changed to null for utility classes.
140	>	*/
141	>	private String _name = FilterMain.NAME;
142	>
143	>	/**
144	>	* This holds a reference to the
145	>	* system logger that is being used.
146	>	*/
147	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
148	>
149	>	//---STATIC ATTRIBUTES---
150	>
151		}

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