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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/clientinterface/PacketSorter.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/clientinterface/PacketSorter.java (file contents):
Revision 1.7 by tdb, Mon Feb 26 23:41:35 2001 UTC vs.
Revision 1.17 by tdb, Fri Mar 16 16:11:31 2001 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	<	package uk.ac.ukc.iscream.clientinterface;
2	>	package uk.org.iscream.clientinterface;
3
4		//---IMPORTS---
5	<	import uk.ac.ukc.iscream.util.*;
6	<	import uk.ac.ukc.iscream.componentmanager.*;
7	<	import uk.ac.ukc.iscream.core.*;
5	>	import uk.org.iscream.util.*;
6	>	import uk.org.iscream.componentmanager.*;
7	>	import uk.org.iscream.core.*;
8		import java.util.*;
9
10		/**
#	Line 33 | Line 33 | class PacketSorter extends Thread {
33
34		/**
35		* Creates a new PacketSorter.
36	–	*
37	–	* @param queueMonitorInterval The interval at which to monitor the Queue
36		*/
37	<	public PacketSorter(int queueMonitorInterval) {
38	<	_queue = new Queue();
39	<	// startup a monitor on this queue, every minute
40	<	String queueName = _name + " PacketSorterQueue";
41	<	_queue.startMonitor(queueMonitorInterval*1000, queueName);
42	<	_hostMap = Collections.synchronizedMap(new HashMap());
43	<	_allHostsList = Collections.synchronizedList(new LinkedList());
37	>	public PacketSorter() {
38	>	// set the Thread name
39	>	setName("clientinterface.PacketSorter");
40	>
41	>	ConfigurationProxy cp = ConfigurationProxy.getInstance();
42	>	String configName = "ClientInterface";
43	>
44	>	// see if this Queue needs a size limit
45	>	try {
46	>	int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit"));
47	>	String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm");
48	>	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
49	>	if(algorithm != -1) {
50	>	_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
51	>	// we have valid values, so lets start it.
52	>	_queue = new Queue(queueSizeLimit, algorithm);
53	>	}
54	>	else {
55	>	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
56	>	// just don't activate a limit
57	>	_queue = new Queue();
58	>	}
59	>
60	>	} catch (PropertyNotFoundException e) {
61	>	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
62	>	// just don't activate a limit
63	>	_queue = new Queue();
64	>	} catch (NumberFormatException e) {
65	>	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
66	>	// just don't activate a limit
67	>	_queue = new Queue();
68	>	}
69	>
70	>	// startup a monitor on this queue
71	>	try {
72	>	// try to get the interval, if this fails, we won't start up the monitor
73	>	int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval"));
74	>	String queueName = _name + " PacketSorterQueue";
75	>	_queue.startMonitor(queueMonitorInterval*1000, queueName);
76	>	} catch (PropertyNotFoundException e) {
77	>	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
78	>	}
79	>
80	>	_hostMap = new HashMap();
81	>	_allHostDataList = new LinkedList();
82	>	_allHostsList = new LinkedList();
83		_logger.write(toString(), Logger.SYSINIT, "created");
84		}
85
#	Line 53 | Line 90 | class PacketSorter extends Thread {
90		* loop forever processing and sending data.
91		*/
92		public void run() {
93	+	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker();
94		int qID = _queue.getQueue();
95		while(true) {
96		// attempt to get some data from the Queue
#	Line 64 | Line 102 | class PacketSorter extends Thread {
102		_logger.write(toString(), Logger.ERROR, "Queue failure: "+e);
103		}
104
105	<	// find out which host this packet is actually for
68	<	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
69	<	XMLPacket packet = xmlPacketMaker.createXMLPacket();
70	<	String host = packet.getParam("packet.attributes.machine_name");
105	>	XMLPacket packet = null;
106
107	<	// look in the hostMap to see if anyone wants this data
108	<	if(_hostMap.containsKey(host)) {
109	<	LinkedList list = (LinkedList) _hostMap.get(host);
110	<	Iterator i = list.iterator();
111	<	// push the data to the listening Handler's queue
112	<	while(i.hasNext()) {
78	<	((Queue) i.next()).add(xml);
79	<	}
107	>	try {
108	>	packet = xmlPacketMaker.createXMLPacket(xml);
109	>	} catch(InvalidXMLException e) {
110	>	_logger.write(toString(), Logger.ERROR, "Invalid XML: "+e);
111	>	// skip the rest of this loop iteration
112	>	continue;
113		}
114
115	<	// any handler in this list wants all packets, so send
116	<	// it on to them regardless
117	<	Iterator j = _allHostsList.iterator();
118	<	while(j.hasNext()) {
119	<	((Queue) j.next()).add(xml);
115	>	String packetType = packet.getParam("packet.attributes.type");
116	>	// check if we need to send it regardless
117	>	if(packetType.equals("data") || packetType.equals("heartbeat")) {
118	>	String host = packet.getParam("packet.attributes.machine_name");
119	>
120	>	// look in the hostMap to see if anyone wants this data
121	>	synchronized(this) {
122	>	if(_hostMap.containsKey(host)) {
123	>	LinkedList list = (LinkedList) _hostMap.get(host);
124	>	Iterator i = list.iterator();
125	>	// push the data to the listening Handler's queue
126	>	while(i.hasNext()) {
127	>	((Queue) i.next()).add(xml);
128	>	}
129	>	}
130	>	}
131	>
132	>	// any handler in this list wants all packets, so send
133	>	// it on to them regardless
134	>	synchronized(this) {
135	>	Iterator i = _allHostDataList.iterator();
136	>	while(i.hasNext()) {
137	>	((Queue) i.next()).add(xml);
138	>	}
139	>	}
140		}
141	+	else {
142	+	// always send this packet to all hosts, because it's
143	+	// "extra" data, not host data
144	+	synchronized(this) {
145	+	Iterator i = _allHostsList.iterator();
146	+	while(i.hasNext()) {
147	+	((Queue) i.next()).add(xml);
148	+	}
149	+	}
150	+	}
151		}
152		}
153
#	Line 104 | Line 167 | class PacketSorter extends Thread {
167		public void register(Queue dhQueue, String hostList) {
168		// check to see if we want all hosts
169		if(hostList.equals("")) {
170	<	_allHostsList.add(dhQueue);
170	>	synchronized(this) {
171	>	_allHostDataList.add(dhQueue);
172	>	}
173		_logger.write(toString(), Logger.SYSMSG, "registered DataHandler for all hosts");
174		}
175		else {
#	Line 112 | Line 177 | class PacketSorter extends Thread {
177		StringTokenizer st = new StringTokenizer(hostList, ";");
178		while(st.hasMoreTokens()) {
179		String host = st.nextToken();
180	<	// see if we already have a list in the map for this host
181	<	if(_hostMap.containsKey(host)) {
182	<	// we do, so add to it
183	<	LinkedList list = (LinkedList) _hostMap.get(host);
184	<	list.add(dhQueue);
180	>	synchronized(this) {
181	>	// see if we already have a list in the map for this host
182	>	if(_hostMap.containsKey(host)) {
183	>	// we do, so add to it
184	>	List list = (List) _hostMap.get(host);
185	>	list.add(dhQueue);
186	>	}
187	>	else {
188	>	// we don't, so create a list and put it in the map
189	>	LinkedList list = new LinkedList();
190	>	list.add(dhQueue);
191	>	_hostMap.put(host, list);
192	>	}
193		}
121	–	else {
122	–	// we don't, so create a list and put it in the map
123	–	List list = Collections.synchronizedList(new LinkedList());
124	–	list.add(dhQueue);
125	–	_hostMap.put(host, list);
126	–	}
194		}
195		_logger.write(toString(), Logger.SYSMSG, "registered DataHandler for hosts: "+hostList);
196		}
197	+	// always add host to our complete host list
198	+	synchronized(this) {
199	+	_allHostsList.add(dhQueue);
200	+	}
201		}
202
203		/**
#	Line 143 | Line 214 | class PacketSorter extends Thread {
214		public void deregister(Queue dhQueue, String hostList) {
215		// go through the list of hosts
216		if(hostList.equals("")) {
217	<	_allHostsList.remove(dhQueue);
217	>	synchronized(this) {
218	>	_allHostDataList.remove(dhQueue);
219	>	}
220		_logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for all hosts");
221		}
222		else {
223		StringTokenizer st = new StringTokenizer(hostList, ";");
224		while(st.hasMoreTokens()) {
225		String host = st.nextToken();
226	<	// this should in reality always be true, but best check
227	<	if(_hostMap.containsKey(host)) {
228	<	// get the list and remove the host in question
229	<	LinkedList list = (LinkedList) _hostMap.get(host);
230	<	list.remove(dhQueue);
231	<	// if the list is now empty, we might as well remove it
232	<	if(list.size()==0) {
233	<	_hostMap.remove(host);
226	>	synchronized(this) {
227	>	// this should in reality always be true, but best check
228	>	if(_hostMap.containsKey(host)) {
229	>	// get the list and remove the host in question
230	>	LinkedList list = (LinkedList) _hostMap.get(host);
231	>	list.remove(dhQueue);
232	>	// if the list is now empty, we might as well remove it
233	>	if(list.size()==0) {
234	>	_hostMap.remove(host);
235	>	}
236		}
237		}
238		}
239		_logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for hosts: "+hostList);
240		}
241	+	// always remove host from our complete host list
242	+	synchronized(this) {
243	+	_allHostsList.remove(dhQueue);
244	+	}
245		}
246
247		/**
248		* Overrides the {@link java.lang.Object#toString() Object.toString()}
249		* method to provide clean logging (every class should have this).
250		*
251	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
251	>	* This uses the uk.org.iscream.util.NameFormat class
252		* to format the toString()
253		*
254		* @return the name of this class and its CVS revision
#	Line 224 | Line 303 | class PacketSorter extends Thread {
303		* A HashMap to store lists of Queue's (in the DataHandlers)
304		* in a way that can be easily accessed when data comes in.
305		*/
306	<	private Map _hostMap;
306	>	private HashMap _hostMap;
307
308		/**
309		* A list specifically for a Queue's associated with DataHandlers
310		* that want all host information.
311		*/
312	<	private List _allHostsList;
312	>	private LinkedList _allHostDataList;
313	>
314	>	/**
315	>	* A list of all hosts.
316	>	*/
317	>	private LinkedList _allHostsList;
318
319		//---STATIC ATTRIBUTES---
320

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