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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/client/monitors/Memory__Monitor.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/client/monitors/Memory__Monitor.java (file contents):
Revision 1.1 by tdb, Tue Mar 6 23:46:13 2001 UTC vs.
Revision 1.19 by tdb, Sun Aug 1 10:40:45 2004 UTC

#	Line 1 | Line 1
1	+	/*
2	+	* i-scream central monitoring system
3	+	* http://www.i-scream.org
4	+	* Copyright (C) 2000-2002 i-scream
5	+	*
6	+	* This program is free software; you can redistribute it and/or
7	+	* modify it under the terms of the GNU General Public License
8	+	* as published by the Free Software Foundation; either version 2
9	+	* of the License, or (at your option) any later version.
10	+	*
11	+	* This program is distributed in the hope that it will be useful,
12	+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14	+	* GNU General Public License for more details.
15	+	*
16	+	* You should have received a copy of the GNU General Public License
17	+	* along with this program; if not, write to the Free Software
18	+	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19	+	*/
20	+
21		//---PACKAGE DECLARATION---
22	<	package uk.ac.ukc.iscream.client.monitors;
22	>	package uk.org.iscream.cms.server.client.monitors;
23
24		//---IMPORTS---
25		import java.util.HashMap;
26	<	import uk.ac.ukc.iscream.client.*;
27	<	import uk.ac.ukc.iscream.core.*;
28	<	import uk.ac.ukc.iscream.util.*;
29	<	import uk.ac.ukc.iscream.componentmanager.*;
26	>	import java.text.NumberFormat;
27	>	import uk.org.iscream.cms.server.client.*;
28	>	import uk.org.iscream.cms.server.core.*;
29	>	import uk.org.iscream.cms.util.*;
30	>	import uk.org.iscream.cms.server.componentmanager.*;
31
32		/**
33		* This Monitor watches the Memory for all machines
#	Line 23 | Line 44 | public class Memory__Monitor extends MonitorSkeleton {
44		*/
45		public final String REVISION = "$Revision$";
46
47	+	/**
48	+	* A description of this monitor
49	+	*/
50		public final String DESC = "Monitors Memory.";
51
52		//---STATIC METHODS---
#	Line 30 | Line 54 | public class Memory__Monitor extends MonitorSkeleton {
54		//---CONSTRUCTORS---
55
56		//---PUBLIC METHODS---
57	<
57	>
58	>	/**
59	>	* Analyse a packet of data, and generate an alert if
60	>	* necessary.
61	>	*
62	>	* @param packet the XMLPacket to analyse
63	>	*/
64		public void analysePacket(XMLPacket packet) {
65	<	if (packet.getParam("packet.attributes.type").equals("data")) {
66	<	String source = packet.getParam("packet.attributes.machine_name");
67	<	if (!_hosts.containsKey(source)) {
68	<	_hosts.put(source, new Register(source, _name, 1));
65	>	String source = packet.getParam("packet.attributes.machine_name");
66	>	if(!checkBooleanConfig("Host." + source, "Monitor." + _name + ".enable")) {
67	>	return;
68	>	}
69	>	if (!_hosts.containsKey(source)) {
70	>	_hosts.put(source, new Register(source, _name));
71	>	}
72	>
73	>	Register reg = (Register) _hosts.get(source);
74	>
75	>	// get the packet data
76	>	double memoryTotal, memoryFree, memoryCache;
77	>	try {
78	>	String total = packet.getParam("packet.memory.total");
79	>	String free = packet.getParam("packet.memory.free");
80	>	if(total==null || free==null) {
81	>	throw new NumberFormatException("Memory data invalid or not supplied");
82		}
83	<
84	<	Register reg = (Register) _hosts.get(source);
85	<
86	<	// find out the threshold level we're at
87	<	String attributeName = "Memory In Use %";
88	<
89	<	// get the packet data
47	<	double memoryTotal, memoryFree;
48	<	try {
49	<	memoryTotal = Double.parseDouble(packet.getParam("packet.memory.total"));
50	<	memoryFree = Double.parseDouble(packet.getParam("packet.memory.free"));
51	<	} catch (NumberFormatException e) {
52	<	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad memory information");
53	<	// don't try to continue and process
54	<	return;
83	>	memoryTotal = Double.parseDouble(total);
84	>	memoryFree = Double.parseDouble(free);
85	>	// get hold of the cache data.. default to 0
86	>	memoryCache = 0.0;
87	>	String cache = packet.getParam("packet.memory.cache");
88	>	if(cache != null) {
89	>	memoryCache = Double.parseDouble(cache);
90		}
91	<
92	<	// percentage of memory in use
93	<	double memoryInUse = (memoryFree / memoryTotal) * 100;
94	<
60	<	int newThreshold = checkAttributeThreshold(memoryInUse, reg);
61	<	processAlert(newThreshold, 0, attributeName, reg, source, String.valueOf(memoryInUse));
91	>	} catch (NumberFormatException e) {
92	>	_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad memory information: "+e);
93	>	// don't try to continue and process
94	>	return;
95		}
96	+
97	+	boolean useValue = false;
98	+	try {
99	+	String option = _cp.getProperty("Host." + source, "Monitor." + _name + ".thresholdMeasure");
100	+	if (option.equals("VALUE")) {
101	+	useValue = true;
102	+	}
103	+	} catch (PropertyNotFoundException e) {
104	+	// we default to percentage
105	+	}
106	+
107	+	boolean useCache = false;
108	+	try {
109	+	int useCacheAsFree = Integer.parseInt(_cp.getProperty("Host." + source, "Monitor." + _name + ".useCacheAsFree"));
110	+	useCache = (useCacheAsFree == 1);
111	+	} catch (PropertyNotFoundException e) {
112	+	// we default to false
113	+	} catch (NumberFormatException e) {
114	+	// we default to false
115	+	}
116	+
117	+	// this bit determines if the memory check is a % check
118	+	// or a byte check
119	+	String type;
120	+	double curValue;
121	+	int newThreshold;
122	+	if(useValue) {
123	+	// bytes of memory available
124	+	if(useCache) {
125	+	// NOTE: we take cache as being "probably free" for this check
126	+	curValue = memoryFree + memoryCache;
127	+	} else {
128	+	curValue = memoryFree;
129	+	}
130	+	// negate check
131	+	newThreshold = checkAttributeThreshold(curValue, reg, true);
132	+	type = "bytes";
133	+	} else {
134	+	// % memory in use
135	+	if(useCache) {
136	+	// NOTE: we take cache as being "probably free" for this check
137	+	curValue = (1 - (((double)memoryFree + (double)memoryCache) / (double)memoryTotal)) * 100;
138	+	} else {
139	+	curValue = (1 - ((double)memoryFree / (double)memoryTotal)) * 100;
140	+	}
141	+	// normal check
142	+	newThreshold = checkAttributeThreshold(curValue, reg, false);
143	+	type = "%";
144	+	}
145	+
146	+	// format the value to a String
147	+	NumberFormat nf = NumberFormat.getInstance();
148	+	nf.setMaximumFractionDigits(2);
149	+	nf.setMinimumFractionDigits(2);
150	+	String strCurValue = nf.format(curValue);
151	+
152	+	// set the attributeName nicely
153	+	String attributeName = type + " Memory in use " + type;
154	+	if(useCache) {
155	+	attributeName += " (ex. cache)";
156	+	}
157	+
158	+	processAlert(newThreshold, attributeName, reg, source, strCurValue);
159		}
160
161		/**
162		* Overrides the {@link java.lang.Object#toString() Object.toString()}
163		* method to provide clean logging (every class should have this).
164		*
165	<	* This uses the uk.ac.ukc.iscream.util.NameFormat class
165	>	* This uses the uk.org.iscream.cms.util.NameFormat class
166		* to format the toString()
167		*
168		* @return the name of this class and its CVS revision
#	Line 86 | Line 182 | public class Memory__Monitor extends MonitorSkeleton {
182		}
183
184		//---PRIVATE METHODS---
185	<
186	<	private int checkAttributeThreshold(double memoryInUse, Register reg) {
185	>
186	>	/**
187	>	* Checks a piece of current data, and returns the
188	>	* threshold it breaches, if any.
189	>	*
190	>	* The option to negate the check can be used in
191	>	* situations where being *below* the threshold
192	>	* is an 'alertable' situation. In this specific
193	>	* case, we'd do this with kb disk checks.
194	>	*
195	>	* @param value the current value
196	>	* @param reg the Register for the host
197	>	* @param negateCheck whether to negate the check
198	>	* @return the threshold level breached, if any
199	>	*/
200	>	private int checkAttributeThreshold(double value, Register reg, boolean negateCheck) {
201		for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) {
202		if (reg.getThreshold(thresholdLevel) != -1.0) {
203	<	if(((double) reg.getThreshold(thresholdLevel)) < memoryInUse) {
204	<	return thresholdLevel;
203	>	if(!negateCheck) {
204	>	// normal check - has the value gone *over* the threshold
205	>	if(((double) reg.getThreshold(thresholdLevel)) < value) {
206	>	return thresholdLevel;
207	>	}
208		}
209	+	else {
210	+	// negated check - has the value gone *under* the threshold
211	+	if(((double) reg.getThreshold(thresholdLevel)) > value) {
212	+	return thresholdLevel;
213	+	}
214	+	}
215		}
216		}
217		return Alert.thresholdNORMAL;
218		}
219
220		//---ACCESSOR/MUTATOR METHODS---
221	+
222	+	/**
223	+	* Returns a reference to a specific Queue for this
224	+	* monitor. This Queue returns only the data packets
225	+	* (based on type) that we want too look at.
226	+	*
227	+	* @return a reference to a Queue
228	+	*/
229	+	protected Queue getQueue() {
230	+	return MonitorManager.getInstance().getDataQueue();
231	+	}
232
233		//---ATTRIBUTES---
234
#	Line 117 | Line 247 | public class Memory__Monitor extends MonitorSkeleton {
247		* A reference to the configuration proxy in use
248		*/
249		private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
250	<
250	>
251	>	/**
252	>	* A HashMap of Registers (or groups of Registers), one
253	>	* for each host we're monitoring.
254	>	*/
255		private HashMap _hosts = new HashMap();
256
257		//---STATIC ATTRIBUTES---

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