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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 1.4 by pjm2, Thu Nov 23 09:14:29 2000 UTC vs.
Revision 1.27 by tdb, Tue Mar 13 02:19:46 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	>	* Constructs an instance of a FilterThread
39	>	*
40	>	* @param queue the Queue this filter is using
41	>	* @param parent a CORBA reference to our parent filter
42	>	*/
43	>	public FilterThread(Queue queue, Filter parent){
44	>	// set the Thread name
45	>	setName("filter.FilterThread");
46	>
47	>	_parent = parent;
48	>	_queue = queue;
49	>	_logger.write(toString(), Logger.SYSINIT, "created");
50		}
51	<
51	>
52	>	//---PUBLIC METHODS---
53	>
54	>	/**
55	>	* Runs the thread, getting data from the Queue and
56	>	* sending it on to the parent filter.
57	>	*/
58		public void run(){
59	<
60	<	// Get a string without any null characters in it.
61	<	String xml = new String(rawPacket);
62	<	if (xml.indexOf(0) != -1) {
63	<	xml = xml.substring(0, xml.indexOf(0));
59	>	// setup the XMLPacketMaker
60	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker();
61	>	// get a queue for ourselves
62	>	int n = _queue.getQueue();
63	>	// keep these out here, saves recreating the object
64	>	String xml = null;
65	>	while(true) {
66	>	// get a String of xml
67	>	try {
68	>	xml = (String) _queue.get(n);
69	>	}
70	>	catch (InvalidQueueException e) {
71	>	_logger.write(toString(), Logger.ERROR, "Queue error: "+e);
72	>	}
73	>
74	>	// Get a string without any null characters in it.
75	>	//  -- maybe String.trim() would be better here ?
76	>	if (xml.indexOf(0) != -1) {
77	>	xml = xml.substring(0, xml.indexOf(0));
78	>	}
79	>	else {
80	>	xml = xml.substring(0, xml.length());
81	>	}
82	>
83	>	// Bundle the XML all on one line (saves space and simplifies
84	>	// the protocol between clientinterface and client).
85	>	StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n");
86	>	xml = "";
87	>	while (tokenizer.hasMoreTokens()) {
88	>	xml += tokenizer.nextToken();
89	>	}
90	>
91	>	// Use XMLPacketMaker to make an XMLPacket object.
92	>	XMLPacket packet = null;
93	>	try {
94	>	packet = xmlPacketMaker.createXMLPacket(xml);
95	>	} catch(InvalidXMLException e) {
96	>	_logger.write(toString(), Logger.ERROR, "Invalid XML: "+e);
97	>	// skip the rest of this loop iteration
98	>	continue;
99	>	}
100	>
101	>	// XMLPacket is ok, so run filters...
102	>	if(PluginFilterManager.getInstance().runFilters(packet)) {
103	>	// and pass it on...
104	>	_parent.receiveXML(xml);
105	>	}
106	>	else {
107	>	// ... or filtered it
108	>	_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
109	>	}
110		}
111	<	else {
29	<	xml = xml.substring(0, xml.length());
30	<	}
31	<	System.out.println(xml);
111	>	}
112
113	<	// Use my XMLPacketMaker to make an XMLPacket object.
114	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
115	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
116	<
117	<	if (packet == null){
118	<	System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
119	<	return;
120	<	}
121	<	System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
122	<	packet.printAll();
123	<	// Now do something with this XMLPacket!!!
124	<	// .... let's try this...
125	<	parent.receiveXML(xml);
126	<
113	>	/**
114	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
115	>	* method to provide clean logging (every class should have this).
116	>	*
117	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
118	>	* to format the toString()
119	>	*
120	>	* @return the name of this class and its CVS revision
121	>	*/
122	>	public String toString() {
123	>	return FormatName.getName(
124	>	_name,
125	>	getClass().getName(),
126	>	REVISION);
127		}
128	+
129	+	//---PRIVATE METHODS---
130	+
131	+	//---ACCESSOR/MUTATOR METHODS---
132	+
133	+	//---ATTRIBUTES---
134	+
135	+	/**
136	+	* Our parent filter
137	+	*/
138	+	Filter _parent;
139
140	<	Filter parent;
141	<	byte[] rawPacket;
140	>	/**
141	>	* The Queue object
142	>	*/
143	>	Queue _queue;
144	>
145	>	/**
146	>	* This is the friendly identifier of the
147	>	* component this class is running in.
148	>	* eg, a Filter may be called "filter1",
149	>	* If this class does not have an owning
150	>	* component,  a name from the configuration
151	>	* can be placed here.  This name could also
152	>	* be changed to null for utility classes.
153	>	*/
154	>	private String _name = FilterMain.NAME;
155	>
156	>	/**
157	>	* This holds a reference to the
158	>	* system logger that is being used.
159	>	*/
160	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
161	>
162	>	//---STATIC ATTRIBUTES---
163	>
164		}

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