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

Comparing projects/cms/source/server/uk/org/iscream/cms/server/client/Register.java (file contents):
Revision 1.3 by ajm, Sun Mar 4 05:23:41 2001 UTC vs.
Revision 1.14 by ajm, Wed Mar 21 23:54:31 2001 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	<	package uk.ac.ukc.iscream.client;
2	>	package uk.org.iscream.client;
3
4		//---IMPORTS---
5	<	import uk.ac.ukc.iscream.util.*;
6	<	import uk.ac.ukc.iscream.componentmanager.ConfigurationProxy;
5	>	import uk.org.iscream.util.*;
6	>	import uk.org.iscream.componentmanager.*;
7
8		/**
9		* The Register class holds theshold values,
10		* the last level of alert for each attribute for a monitor
11	<	* and the time of last alert sent for each alert level for
12	<	* each attribute in this register.
11	>	* and the time of last alert sent for each alert level.
12		*
13		* This class is used by monitor classes so they can determine
14		* how often they should send alerts when breaching alert levels.
#	Line 34 | Line 33 | public class Register {
33
34		/**
35		* Construct a Register with the hostname and monitorName
36	<	* (for obtaining the threshold values), and the number of
37	<	* attributes we are keeping track of.
36	>	* (for obtaining the threshold values).
37	>	* This constructs a generic register for a specific monitor.
38		*
39		* @param hostname the hostname this register is for
40		* @param monitorName the monitor this register is for
42	–	* @param numAttributes the number of attributes to track
41		*/
42	<	public Register(String hostname, String monitorName, int numAttributes) {
42	>	public Register(String hostname, String monitorName) {
43	>	this(hostname, monitorName, null);
44	>	}
45	>
46	>	/**
47	>	* Construct a Register with the hostname and monitorName
48	>	* (for obtaining the threshold values).
49	>	* This constructs a register for a specific attribute check
50	>	* by a monitor.
51	>	*
52	>	* @param hostname the hostname this register is for
53	>	* @param monitorName the monitor this register is for
54	>	* @param attributeName the specific attribute this register is for
55	>	*/
56	>	public Register(String hostname, String monitorName, String attributeName) {
57		_hostname = hostname;
58		_monitorName = monitorName;
59	<	_lastAlertLevels = new int[numAttributes];
60	<	_lastThresholdLevels = new int[numAttributes];
61	<	_lastAlertTimeout = new long[numAttributes];
62	<	_times = new long[numAttributes][Alert.alertLevels.length];
59	>	_attributeName = attributeName;
60	>	_lastAlertLevel = 0;
61	>	_lastThresholdLevel = 0;
62	>	_initialAlertTime= 0;
63	>	_lastAlertTimeout = 0;
64	>	_times = new long[Alert.alertLevels.length];
65		// initialise the arrays to 0
66	<	for (int x = 0; x < _lastAlertLevels.length; x++) {
67	<	_lastAlertLevels[x] = 0;
54	<	_lastThresholdLevels[x] = 0;
55	<	_lastAlertTimeout[x] = 0;
56	<	for(int y = 0; y < Alert.alertLevels.length; y++) {
57	<	_times[x][y] = 0;
58	<	}
66	>	for(int x = 0; x < Alert.alertLevels.length; x++) {
67	>	_times[x] = 0;
68		}
69		}
70	+
71
72		//---PUBLIC METHODS---
73
74		//---PRIVATE METHODS---
75
76	+	/**
77	+	* Obtains a threshold value from the configuration for a given level.
78	+	* The attribute name specifies which property to get.
79	+	* eg, attributeName = idle it will look for
80	+	*     Monitor.<monitor name>.idle.threshold.<alert level>
81	+	* eg, attributeName = null
82	+	*     Monitor.<monitor name>.threshold.<alert level>
83	+	*
84	+	* Note that if its null, this will get the threshold for the monitor
85	+	* as a whole, not the specific attribute.
86	+	*
87	+	* @param level the alert level to get the attribute for
88	+	* @param attributeName the attribute to get the threshold for
89	+	*
90	+	* @return the threshold obtained
91	+	*/
92	+	private String getThresholdConfig(int level, String attributeName) throws PropertyNotFoundException {
93	+	String temp = "";
94	+	if (attributeName != null) {
95	+	temp = "." + attributeName;
96	+	}
97	+	return _cp.getProperty("Host." + _hostname, "Monitor." + _monitorName + temp + ".threshold." + Alert.thresholdLevels[level]);
98	+	}
99	+
100		//---ACCESSOR/MUTATOR METHODS---
101
102		/**
103	<	* Gets the last alert level for the
70	<	* given attribute.
103	>	* Gets the last alert level
104		*
72	–	* @param attributeNum the attribute to get
73	–	*
105		* @return the last alert level
106		*/
107	<	public int getLastAlertLevel(int attributeNum) {
108	<	return _lastAlertLevels[attributeNum];
107	>	public int getLastAlertLevel() {
108	>	return _lastAlertLevel;
109		}
110
111		/**
112	<	* Sets the last threshold level for the
82	<	* given attribute.
112	>	* Sets the last threshold level
113		*
84	–	* @param attributeNum the attribute to set
114		* @param level the new last threshold level
115		*/
116	<	public void setLastThresholdLevel(int attributeNum, int level) {
117	<	_lastThresholdLevels[attributeNum] = level;
116	>	public void setLastThresholdLevel(int level) {
117	>	_lastThresholdLevel = level;
118		}
119
120	<	/**
121	<	* Gets the last threshold level for the
93	<	* given attribute.
120	>	/**
121	>	* Gets the last threshold level
122		*
95	–	* @param attributeNum the attribute to get
96	–	*
123		* @return the last threshold level
124		*/
125	<	public int getLastThresholdLevel(int attributeNum) {
126	<	return _lastThresholdLevels[attributeNum];
125	>	public int getLastThresholdLevel() {
126	>	return _lastThresholdLevel;
127		}
128
129		/**
130	<	* Sets the last alert level for the
105	<	* given attribute.
130	>	* Sets the last alert level
131		*
132	<	* @param attributeNum the attribute to set
132	>	* Note that if this is setting to an OK
133	>	* level alert, it resets _maxLevelCount.
134	>	*
135	>	* This also sets the "initialAlertTime"
136	>	* if the next alert after OK is set.
137	>	* And resets it to 0 if it IS an OK.
138	>	*
139		* @param level the new last alert level
140		*/
141	<	public void setLastAlertLevel(int attributeNum, int level) {
142	<	_lastAlertLevels[attributeNum] = level;
141	>	public void setLastAlertLevel(int level) {
142	>	_lastAlertLevel = level;
143	>	if (level == Alert.alertOK) {
144	>	_maxLevelCount = 0;
145	>	// we won't do this, so OK's still have the initialAlertTime
146	>	// of the original alert they're OK'ing
147	>	//_initialAlertTime = 0;
148	>	}
149	>	if (level == Alert.alertOK + 1) {
150	>	_initialAlertTime = System.currentTimeMillis();
151	>	}
152		}
153
154		/**
155	<	* Gets the time an alert was sent for the
116	<	* given attribute at the given level.
155	>	* Gets the time an alert was sent at the given level.
156		*
118	–	* @param attributeNum the attribute to get
157		* @param level the alert level to get
158		*
159		* @return the time last sent
160		*/
161	<	public long getTimeLastSent(int attributeNum) {
162	<	return _times[attributeNum][getLastAlertLevel(attributeNum)];
161	>	public long getTimeLastSent() {
162	>	return _times[getLastAlertLevel()];
163		}
164
165		/**
166	<	* Gets the time an alert was sent for the
129	<	* given attribute at the given level.
166	>	* Gets the time an alert was sent at the given level.
167		*
131	–	* @param attributeNum the attribute to get
168		* @param level the alert level to get
169		* @param value the new time
170		*/
171	<	public void setTimeLastSent(int attributeNum, long value) {
172	<	_times[attributeNum][getLastAlertLevel(attributeNum)] = value;
171	>	public void setTimeLastSent(long value) {
172	>	_times[getLastAlertLevel()] = value;
173		}
174
175		/**
#	Line 146 | Line 182 | public class Register {
182		* @param level the alert level
183		*/
184		public double getThreshold(int level) {
185	+	// -1.0 means we don't use an alert level
186		double threshold = -1.0;
187	<	String thresholdString = _cp.getProperty("Host." + _hostname, "Monitor." + _monitorName + ".threshold." + Alert.thresholdLevels[level]);
188	<	if(thresholdString != null) {
189	<	try {
190	<	threshold = Double.parseDouble(thresholdString);
191	<	} catch (NumberFormatException e) {
192	<	// -1.0 means we don't use an alert level
193	<	threshold = -1.0;
157	<	}
187	>	try {
188	>	String thresholdString = getThresholdConfig(level, _attributeName);
189	>	threshold = Double.parseDouble(thresholdString);
190	>	} catch (PropertyNotFoundException e) {
191	>	threshold = -1.0;
192	>	} catch (NumberFormatException e) {
193	>	threshold = -1.0;
194		}
195		return threshold;
196		}
#	Line 171 | Line 207 | public class Register {
207		* progress faster should a higher threshold value be passed
208		*
209		* If there is no alert timeout for a
210	<	* given level, this returns -1.0
210	>	* given level, this returns 0
211		*
212		* @param level the alert level
213		* @param thresholdLevel the threshold leve we are on
214		*/
215	<	public long getAlertTimeout(int level, int attributeNum) {
215	>	public long getAlertTimeout(int level) {
216	>	// 0 means we don't use this value
217		long timeout = 0;
218	<	String timeoutString = _cp.getProperty("Host." + _hostname, "Monitor." + _monitorName + ".alertTimeout." + Alert.alertLevels[level]);
219	<	if(timeoutString != null) {
220	<	try {
221	<	int threshold = getLastThresholdLevel(attributeNum);
222	<	if (threshold > 0) {
186	<	timeout = (Long.parseLong(timeoutString) / threshold) * 1000;
187	<	}
188	<	} catch (NumberFormatException e) {
189	<	// -1.0 means we don't use this value
190	<	timeout = 0;
218	>	try {
219	>	String timeoutString = _cp.getProperty("Host." + _hostname, "Monitor." + _monitorName + ".alertTimeout." + Alert.alertLevels[level]);
220	>	int threshold = getLastThresholdLevel();
221	>	if (threshold > 0) {
222	>	timeout = (Long.parseLong(timeoutString) / threshold) * 1000;
223		}
224	+	} catch (PropertyNotFoundException e) {
225	+	timeout = 0;
226	+	} catch (NumberFormatException e) {
227	+	timeout = 0;
228		}
229		return timeout;
230		}
#	Line 198 | Line 234 | public class Register {
234		* the maximum alert level has been reached, simply returns
235		* that.
236		*
237	<	* @param attributeNum the attribute to get next alert for
237	>	* Note this method will NEVER reach the last alert level
238	>	* in the list, this is assumed to be FINAL, and special
239	>	* logic is in place to handle that.
240	>	*
241		*/
242	<	public int getNextAlertLevel(int attributeNum) {
243	<	if((getLastAlertLevel(attributeNum) + 1) > (Alert.alertLevels.length - 1)) {
244	<	return getLastAlertLevel(attributeNum);
242	>	public int getNextAlertLevel() {
243	>	if((getLastAlertLevel() + 1) > (Alert.alertLevels.length - 2)) {
244	>	return getLastAlertLevel();
245		}
246	<	return getLastAlertLevel(attributeNum) + 1;
246	>	return getLastAlertLevel() + 1;
247		}
248
249		/**
250		* Gets the timeout value of the last alert
251		* sent
252		*
214	–	* @param attrubuteNum the attribute to get the last timeout for
253		* @return the last timeout value
254		*/
255	<	public long getLastAlertTimeout(int attributeNum) {
256	<	return _lastAlertTimeout[attributeNum];
255	>	public long getLastAlertTimeout() {
256	>	return _lastAlertTimeout;
257		}
258
259		/**
260		* Sets the timeout value of the last alert
261		* sent
262		*
225	–	* @param attrubuteNum the attribute to get the last timeout for
263		* @param timeout the new value
264		*/
265	<	public void setLastAlertTimeout(int attributeNum, long timeout) {
266	<	_lastAlertTimeout[attributeNum] = timeout;
265	>	public void setLastAlertTimeout(long timeout) {
266	>	_lastAlertTimeout = timeout;
267		}
268
269		/**
270	+	* Returns the time that the first alert was sent
271	+	* for an attribute that has passed a threshold value
272	+	*
273	+	*/
274	+	public long getInitialAlertTime() {
275	+	return _initialAlertTime;
276	+	}
277	+
278	+	/**
279		* Advances the alert level to the next one up.
280		*
281	<	* @param attributeNum the attribute to advance the alert for
281	>	* This keeps track of the number of the number
282	>	* of times the highest NON-FINAL alert level
283	>	* has been reached.  Note this isn't a specific
284	>	* level, just the highest, so you could configure
285	>	* more levels and not affect this.
286	>	*
287	>	* If the count exceeds the number of times
288	>	* set in the configuration, it escalates to
289	>	* a FINAL alert if we're using FINAL's.
290	>	*
291	>	* It determines if to use FINAL's from the config
292	>	* entry reachFINALcount, when the count exceeds
293	>	* this value, it escalates to a FINAL.  If that attribute
294	>	* is mis-read or is not configured.  It will NEVER reach
295	>	* a FINAL.
296	>	*
297		*/
298	<	public void escalateAlert(int attributeNum) {
299	<	setLastAlertLevel(attributeNum, getNextAlertLevel(attributeNum));
298	>	public void escalateAlert() {
299	>	// don't escalate if we're already on the last alert
300	>	if(getLastAlertLevel() != Alert.alertLevels.length -1) {
301	>	setLastAlertLevel(getNextAlertLevel());
302	>	}
303	>	try {
304	>	// note if we fail to get this value, we won't process the res of this
305	>	int reachFINALcount = Integer.parseInt(_cp.getProperty("Host." + _hostname, "Monitor." + _monitorName + ".reachFINALcount"));
306	>	if (getLastAlertLevel() == Alert.alertLevels.length - 2) {
307	>	_maxLevelCount++;
308	>	if(_maxLevelCount > reachFINALcount) {
309	>	setLastAlertLevel(Alert.alertFINAL);
310	>	}
311	>	}
312	>	} catch (PropertyNotFoundException e) {
313	>	// we NEVER reach FINAL in this case
314	>	} catch (NumberFormatException e) {
315	>	// we NEVER reach FINAL in this case
316	>	}
317		}
318
319		//---ATTRIBUTES---
#	Line 249 | Line 327 | public class Register {
327		* The monitor this register is for
328		*/
329		private String _monitorName;
330	+
331	+	/**
332	+	* The attribute name, as obtained from
333	+	* the configuration.
334	+	* eg, idle or /var
335	+	*/
336	+	private String _attributeName;
337
338		/**
339		* An array of last alert levels for
340		* each attribute this register is looking
341		* after.
342		*/
343	<	private int[] _lastAlertLevels;
343	>	private int _lastAlertLevel;
344
345		/**
346		* An array of last threshold levels for
347		* each attribute this register is looking
348		* after.
349		*/
350	<	private int[] _lastThresholdLevels;
350	>	private int _lastThresholdLevel;
351
352		/**
353		* An array of last alert timeout levels for
354		* each attribute this register is looking
355		* after.
356		*/
357	<	private long[] _lastAlertTimeout;
357	>	private long _lastAlertTimeout;
358
359		/**
360		* An array of arrays containing
361		* time an alert of each level
362		* was last sent for each attribute.
363		*/
364	<	private long[][] _times;
364	>	private long[] _times;
365	>
366	>	/**
367	>	* Initial times that an alert was first
368	>	* raised.
369	>	*/
370	>	private long _initialAlertTime;
371
372		/**
373		* A reference to the configuration proxy in use
374		*/
375		private ConfigurationProxy _cp = ConfigurationProxy.getInstance();
376	+
377	+	/**
378	+	* The number of times the maximum level alert
379	+	* has occured IN A ROW, this is escalated by
380	+	* the escalate(int) method, and reset by the
381	+	* setLastAlertLevel(int, int) method
382	+	*/
383	+	private int _maxLevelCount = 0;
384
385		//---STATIC ATTRIBUTES---
386

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