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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 1.2 by tdb, Wed Nov 22 09:33:52 2000 UTC vs.
Revision 1.21 by tdb, Mon Feb 12 00:36:20 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	+	/**
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	<	public FilterThread(Filter parent){
27	<	this.parent = parent;
28	<	// no-args constructor.
29	<	}
26	>	//---FINAL ATTRIBUTES---
27	>
28	>	/**
29	>	* The current CVS revision of this class
30	>	*/
31	>	public final String REVISION = "$Revision$";
32
33	<	public void run(DatagramPacket packet){
34	<	rawPacket = packet.getData();
35	<	start();
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	>	_parent = parent;
45	>	_queue = queue;
46	>	_logger.write(toString(), Logger.SYSINIT, "created");
47		}
48	<
49	<	public void run(String xml){
50	<	rawPacket = xml.getBytes();
51	<	start();
52	<	}
53	<
48	>
49	>	//---PUBLIC METHODS---
50	>
51	>	/**
52	>	* Runs the thread, getting data from the Queue and
53	>	* sending it on to the parent filter.
54	>	*/
55		public void run(){
56	<
57	<	// Get a string without any null characters in it.
58	<	String xml = new String(rawPacket);
59	<	if(xml.indexOf(0)!=-1) {
60	<	xml = xml.substring(0, xml.indexOf(0));
56	>	// get a queue for ourselves
57	>	int n = _queue.getQueue();
58	>	// keep these out here, saves recreating the object
59	>	String xml = null;
60	>	while(true) {
61	>	// get a String of xml
62	>	try {
63	>	xml = (String) _queue.get(n);
64	>	}
65	>	catch (InvalidQueueException e) {
66	>	_logger.write(toString(), Logger.ERROR, "Queue error: "+e);
67	>	}
68	>
69	>	// Get a string without any null characters in it.
70	>	//  -- maybe String.trim() would be better here ?
71	>	if (xml.indexOf(0) != -1) {
72	>	xml = xml.substring(0, xml.indexOf(0));
73	>	}
74	>	else {
75	>	xml = xml.substring(0, xml.length());
76	>	}
77	>
78	>	// Bundle the XML all on one line (saves space and simplifies
79	>	// the protocol between clientinterface and client).
80	>	StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n");
81	>	xml = "";
82	>	while (tokenizer.hasMoreTokens()) {
83	>	xml += tokenizer.nextToken();
84	>	}
85	>
86	>	// Use XMLPacketMaker to make an XMLPacket object.
87	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
88	>	XMLPacket packet = xmlPacketMaker.createXMLPacket();
89	>
90	>	if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) {
91	>	// packet is not null
92	>	// packet was not dropped by a plugin
93	>	// ... best pass it on !
94	>	_parent.receiveXML(xml);
95	>	}
96	>	else {
97	>	// either we had a null, or a plugin dropped it
98	>	_logger.write(toString(), Logger.DEBUG, "An XML packet containing ill-parsing XML was rejected.");
99	>	}
100		}
101	<	else {
31	<	xml = xml.substring(0, xml.length());
32	<	}
33	<	System.out.println(xml);
101	>	}
102
103	<	// USe my XMLPacketMaker to make an XMLPacket object.
104	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
105	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
106	<
107	<	if (packet == null){
108	<	System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
109	<	return;
110	<	}
111	<	System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
112	<	packet.printAll();
113	<	// Now do something with this XMLPacket!!!
114	<	// .... but what? ;-)
115	<	parent.receiveXML(xml);
116	<
103	>	/**
104	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
105	>	* method to provide clean logging (every class should have this).
106	>	*
107	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
108	>	* to format the toString()
109	>	*
110	>	* @return the name of this class and its CVS revision
111	>	*/
112	>	public String toString() {
113	>	return FormatName.getName(
114	>	_name,
115	>	getClass().getName(),
116	>	REVISION);
117		}
118	+
119	+	//---PRIVATE METHODS---
120	+
121	+	//---ACCESSOR/MUTATOR METHODS---
122	+
123	+	//---ATTRIBUTES---
124	+
125	+	/**
126	+	* Our parent filter
127	+	*/
128	+	Filter _parent;
129
130	<	Filter parent;
131	<	byte[] rawPacket;
130	>	/**
131	>	* The Queue object
132	>	*/
133	>	Queue _queue;
134	>
135	>	/**
136	>	* This is the friendly identifier of the
137	>	* component this class is running in.
138	>	* eg, a Filter may be called "filter1",
139	>	* If this class does not have an owning
140	>	* component,  a name from the configuration
141	>	* can be placed here.  This name could also
142	>	* be changed to null for utility classes.
143	>	*/
144	>	private String _name = FilterMain.NAME;
145	>
146	>	/**
147	>	* This holds a reference to the
148	>	* system logger that is being used.
149	>	*/
150	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
151	>
152	>	//---STATIC ATTRIBUTES---
153	>
154		}

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