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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 1.1 by pjm2, Wed Nov 22 08:40:53 2000 UTC vs.
Revision 1.35 by tdb, Sat May 18 18:16:02 2002 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream central monitoring system
3	+	* Copyright (C) 2000-2002 i-scream
4	+	*
5	+	* This program is free software; you can redistribute it and/or
6	+	* modify it under the terms of the GNU General Public License
7	+	* as published by the Free Software Foundation; either version 2
8	+	* of the License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful,
11	+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13	+	* GNU General Public License for more details.
14	+	*
15	+	* You should have received a copy of the GNU General Public License
16	+	* along with this program; if not, write to the Free Software
17	+	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18	+	*/
19	+
20	+	//---PACKAGE DECLARATION---
21	+	package uk.org.iscream.cms.server.filter;
22	+
23	+	//---IMPORTS---
24		import java.io.*;
25		import java.net.*;
26		import java.util.*;
27	+	import uk.org.iscream.cms.server.core.*;
28	+	import uk.org.iscream.cms.server.componentmanager.*;
29	+	import uk.org.iscream.cms.server.filter.*;
30	+	import uk.org.iscream.cms.server.util.*;
31
32	<	public class UDPReaderThread extends Thread{
32	>	/**
33	>	* Handle an incoming packet as a separate thread.
34	>	* Passes the data through various plugins, then
35	>	* passes it on to the parent filter.
36	>	*
37	>	* Now grabs data from a single queue, rather than
38	>	* waiting to be contacted.
39	>	*
40	>	* @author  $Author$
41	>	* @version $Id$
42	>	*/
43	>	public class FilterThread extends Thread{
44
45	<	public FilterThread(){
46	<	// no-args constructor.
47	<	}
45	>	//---FINAL ATTRIBUTES---
46	>
47	>	/**
48	>	* The current CVS revision of this class
49	>	*/
50	>	public final String REVISION = "$Revision$";
51
52	<	public void run(DatagramPacket packet){
53	<	rawPacket = packet.getData();
54	<	start();
52	>	//---STATIC METHODS---
53	>
54	>	//---CONSTRUCTORS---
55	>
56	>	/**
57	>	* Constructs an instance of a FilterThread
58	>	*
59	>	* @param queue the Queue this filter is using
60	>	*/
61	>	public FilterThread(Queue queue){
62	>	// set the Thread name
63	>	setName("filter.FilterThread");
64	>
65	>	_queue = queue;
66	>	_logger.write(toString(), Logger.SYSINIT, "created");
67		}
15	–
16	–	public void run(String xml){
17	–	rawPacket = xml.getBytes();
18	–	start();
19	–	}
20	–
21	–	public void run(){
22	–
23	–	// Get a string without any null characters in it.
24	–	String xml = new String(rawPacket);
25	–	xml = xml.substring(0, xml.indexOf(0));
68
69	<	// USe my XMLPacketMaker to make an XMLPacket object.
70	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
71	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
72	<
73	<	if (packet == null){
74	<	System.out.println("UDPReaderThread - A null XMLPacket was returned, I think I'll ignore it!");
75	<	return;
69	>	//---PUBLIC METHODS---
70	>
71	>	/**
72	>	* Runs the thread, getting data from the Queue and
73	>	* sending it on to the parent filter.
74	>	*/
75	>	public void run(){
76	>	// setup the XMLPacketMaker
77	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker();
78	>	// get a queue for ourselves
79	>	int n = _queue.getQueue();
80	>	// keep these out here, saves recreating the object
81	>	String xml = null;
82	>	String parentFilterName = "";
83	>	Filter parent = null;
84	>	while(true) {
85	>	// get a String of xml
86	>	try {
87	>	xml = (String) _queue.get(n);
88	>	}
89	>	catch (InvalidQueueException e) {
90	>	_logger.write(toString(), Logger.ERROR, "Queue error: "+e);
91	>	}
92	>
93	>	// Get a string without any null characters in it.
94	>	//  -- maybe String.trim() would be better here ?
95	>	if (xml.indexOf(0) != -1) {
96	>	xml = xml.substring(0, xml.indexOf(0));
97	>	}
98	>
99	>	// Bundle the XML all on one line (saves space and simplifies
100	>	// the protocol between clientinterface and client).
101	>	StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n");
102	>	xml = "";
103	>	while (tokenizer.hasMoreTokens()) {
104	>	xml += tokenizer.nextToken();
105	>	}
106	>
107	>	// Use XMLPacketMaker to make an XMLPacket object.
108	>	XMLPacket packet = null;
109	>	try {
110	>	packet = xmlPacketMaker.createXMLPacket(xml);
111	>	} catch(InvalidXMLException e) {
112	>	_logger.write(toString(), Logger.ERROR, "Invalid XML: "+e);
113	>	// skip the rest of this loop iteration
114	>	continue;
115	>	}
116	>
117	>	// get parent
118	>	try {
119	>	String newParent = ConfigurationProxy.getInstance().getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
120	>	if(!parentFilterName.equals(newParent)) {
121	>	parentFilterName = newParent;
122	>	parent = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
123	>	_logger.write(toString(), Logger.DEBUG, "Parent filter changed to: "+parentFilterName);
124	>	}
125	>	} catch (PropertyNotFoundException e) {
126	>	continue;
127	>	}
128	>
129	>	// XMLPacket is ok, run filters...
130	>	if(PluginFilterManager.getInstance().runFilters(packet)) {
131	>	// and pass it on...
132	>	parent.receiveXML(xml);
133	>	}
134	>	else {
135	>	// ... or filtered it
136	>	_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
137	>	}
138		}
35	–	System.out.println("UDPReaderThread - An XML Packet was read sucessfully: -");
36	–	packet.printAll();
37	–	// Now do something with this XMLPacket!!!
38	–	// .... but what? ;-)
39	–
139		}
140	+
141	+	/**
142	+	* Overrides the {@link java.lang.Object#toString() Object.toString()}
143	+	* method to provide clean logging (every class should have this).
144	+	*
145	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
146	+	* to format the toString()
147	+	*
148	+	* @return the name of this class and its CVS revision
149	+	*/
150	+	public String toString() {
151	+	return FormatName.getName(
152	+	_name,
153	+	getClass().getName(),
154	+	REVISION);
155	+	}
156	+
157	+	//---PRIVATE METHODS---
158	+
159	+	//---ACCESSOR/MUTATOR METHODS---
160	+
161	+	//---ATTRIBUTES---
162
163	<	byte[] rawPacket;
163	>	/**
164	>	* The Queue object
165	>	*/
166	>	Queue _queue;
167	>
168	>	/**
169	>	* This is the friendly identifier of the
170	>	* component this class is running in.
171	>	* eg, a Filter may be called "filter1",
172	>	* If this class does not have an owning
173	>	* component,  a name from the configuration
174	>	* can be placed here.  This name could also
175	>	* be changed to null for utility classes.
176	>	*/
177	>	private String _name = FilterMain.NAME;
178	>
179	>	/**
180	>	* This holds a reference to the
181	>	* system logger that is being used.
182	>	*/
183	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
184	>
185	>	/**
186	>	* A reference to the reference manager in use
187	>	*/
188	>	private ReferenceManager _refman = ReferenceManager.getInstance();
189	>
190	>	//---STATIC ATTRIBUTES---
191	>
192		}

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