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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 1.13 by tdb, Wed Dec 6 22:57:45 2000 UTC vs.
Revision 1.34 by tdb, Fri Mar 22 16:42:54 2002 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	<	package uk.ac.ukc.iscream.filter;
2	>	package uk.org.iscream.cms.server.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.*;
8	>	import uk.org.iscream.cms.server.core.*;
9	>	import uk.org.iscream.cms.server.componentmanager.*;
10	>	import uk.org.iscream.cms.server.filter.*;
11	>	import uk.org.iscream.cms.server.util.*;
12
13		/**
14	<	* Handle an incoming UDP packet as a separate thread.
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		*/
#	Line 27 | Line 33 | public class FilterThread extends Thread{
33		//---STATIC METHODS---
34
35		//---CONSTRUCTORS---
36	<
37	<	// Class constructor. Obtains the byte[] from a DatagramPacket.
38	<	public FilterThread(DatagramPacket packet, Filter parent){
39	<	_parent = parent;
40	<	_rawPacket = packet.getData();
41	<	_logger.write(this.toString(), Logger.DEBUG, "created");
36	>
37	>	/**
38	>	* Constructs an instance of a FilterThread
39	>	*
40	>	* @param queue the Queue this filter is using
41	>	*/
42	>	public FilterThread(Queue queue){
43	>	// set the Thread name
44	>	setName("filter.FilterThread");
45
46	+	_queue = queue;
47	+	_logger.write(toString(), Logger.SYSINIT, "created");
48		}
38	–
39	–	// Class constructor for passing XML Strings.
40	–	public FilterThread(String xml, Filter parent){
41	–	_parent = parent;
42	–	_rawPacket = xml.getBytes();
43	–	_logger.write(this.toString(), Logger.DEBUG, "created");
44	–	}
49
50		//---PUBLIC METHODS---
51
52	+	/**
53	+	* Runs the thread, getting data from the Queue and
54	+	* sending it on to the parent filter.
55	+	*/
56		public void run(){
57	<
58	<	// Get a string without any null characters in it.
59	<	//  -- maybe String.trim() would be better here ?
60	<	String xml = new String(_rawPacket);
61	<	if (xml.indexOf(0) != -1) {
62	<	xml = xml.substring(0, xml.indexOf(0));
57	>	// setup the XMLPacketMaker
58	>	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker();
59	>	// get a queue for ourselves
60	>	int n = _queue.getQueue();
61	>	// keep these out here, saves recreating the object
62	>	String xml = null;
63	>	String parentFilterName = "";
64	>	Filter parent = 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	>
80	>	// Bundle the XML all on one line (saves space and simplifies
81	>	// the protocol between clientinterface and client).
82	>	StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n");
83	>	xml = "";
84	>	while (tokenizer.hasMoreTokens()) {
85	>	xml += tokenizer.nextToken();
86	>	}
87	>
88	>	// Use XMLPacketMaker to make an XMLPacket object.
89	>	XMLPacket packet = null;
90	>	try {
91	>	packet = xmlPacketMaker.createXMLPacket(xml);
92	>	} catch(InvalidXMLException e) {
93	>	_logger.write(toString(), Logger.ERROR, "Invalid XML: "+e);
94	>	// skip the rest of this loop iteration
95	>	continue;
96	>	}
97	>
98	>	// get parent
99	>	try {
100	>	String newParent = ConfigurationProxy.getInstance().getProperty("Filter." + FilterMain.NAME, "Filter.parentFilter");
101	>	if(!parentFilterName.equals(newParent)) {
102	>	parentFilterName = newParent;
103	>	parent = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName));
104	>	_logger.write(toString(), Logger.DEBUG, "Parent filter changed to: "+parentFilterName);
105	>	}
106	>	} catch (PropertyNotFoundException e) {
107	>	continue;
108	>	}
109	>
110	>	// XMLPacket is ok, run filters...
111	>	if(PluginFilterManager.getInstance().runFilters(packet)) {
112	>	// and pass it on...
113	>	parent.receiveXML(xml);
114	>	}
115	>	else {
116	>	// ... or filtered it
117	>	_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
118	>	}
119		}
56	–	else {
57	–	xml = xml.substring(0, xml.length());
58	–	}
59	–
60	–	// Use my XMLPacketMaker to make an XMLPacket object.
61	–	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
62	–	XMLPacket packet = xmlPacketMaker.createXMLPacket();
63	–
64	–	if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) {
65	–	// packet is not null
66	–	// packet was not dropped by a plugin
67	–	// ... best pass it on !
68	–	_parent.receiveXML(xml);
69	–	}
70	–	else {
71	–	// either we had a null, or a plugin dropped it
72	–	_logger.write(this.toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system.");
73	–	}
74	–
120		}
121
122		/**
123		* Overrides the {@link java.lang.Object#toString() Object.toString()}
124		* method to provide clean logging (every class should have this).
125		*
126	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
127	+	* to format the toString()
128	+	*
129		* @return the name of this class and its CVS revision
130		*/
131		public String toString() {
132	<	return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
132	>	return FormatName.getName(
133	>	_name,
134	>	getClass().getName(),
135	>	REVISION);
136		}
137
138		//---PRIVATE METHODS---
#	Line 89 | Line 140 | public class FilterThread extends Thread{
140		//---ACCESSOR/MUTATOR METHODS---
141
142		//---ATTRIBUTES---
143	+
144	+	/**
145	+	* The Queue object
146	+	*/
147	+	Queue _queue;
148	+
149	+	/**
150	+	* This is the friendly identifier of the
151	+	* component this class is running in.
152	+	* eg, a Filter may be called "filter1",
153	+	* If this class does not have an owning
154	+	* component,  a name from the configuration
155	+	* can be placed here.  This name could also
156	+	* be changed to null for utility classes.
157	+	*/
158	+	private String _name = FilterMain.NAME;
159
160	<	Filter _parent;
161	<	byte[] _rawPacket;
162	<	Logger _logger = ReferenceManager.getInstance().getLogger();
163	<	String _name = ReferenceManager.getInstance().getName();
160	>	/**
161	>	* This holds a reference to the
162	>	* system logger that is being used.
163	>	*/
164	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
165	>
166	>	/**
167	>	* A reference to the reference manager in use
168	>	*/
169	>	private ReferenceManager _refman = ReferenceManager.getInstance();
170
171		//---STATIC ATTRIBUTES---
172

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