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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.client.monitors; |
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package uk.org.iscream.client.monitors; |
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//---IMPORTS--- |
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import java.util.HashMap; |
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import uk.ac.ukc.iscream.client.*; |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.util.*; |
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import uk.ac.ukc.iscream.componentmanager.*; |
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import uk.org.iscream.client.*; |
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import uk.org.iscream.core.*; |
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import uk.org.iscream.util.*; |
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import uk.org.iscream.componentmanager.*; |
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/** |
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* This Monitor watches the CPU load for all machines |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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public class CPU__Monitor implements PluginMonitor { |
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public class CPU__Monitor extends MonitorSkeleton { |
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//---FINAL ATTRIBUTES--- |
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*/ |
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public final String REVISION = "$Revision$"; |
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/** |
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* A description of this monitor |
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*/ |
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public final String DESC = "Monitors CPU."; |
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//---STATIC METHODS--- |
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//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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/** |
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* Analyse a packet of data, and generate an alert if |
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* necessary. |
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* |
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* @param packet the XMLPacket to analyse |
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*/ |
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public void analysePacket(XMLPacket packet) { |
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if (packet.getParam("packet.attributes.type").equals("data")) { |
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String source = packet.getParam("packet.attributes.machine_name"); |
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if (!_hosts.containsKey(source)) { |
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_hosts.put(source, new Register(source, _name, _attributes.length)); |
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} |
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Register reg = (Register) _hosts.get(source); |
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for(int attributeNum = 0; attributeNum < _attributes.length; attributeNum++) { |
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// find out the threshold level we're at |
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int result = checkAttributeThreshold(packet.getParam(_attributes[attributeNum]), reg); |
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// decide what threshold level we're on, if we've changed, record that |
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if (result != reg.getLastThresholdLevel(attributeNum)) { |
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reg.setLastThresholdLevel(attributeNum, result); |
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} |
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// as long as this isn't a normal level |
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if(reg.getLastThresholdLevel(attributeNum) != Alert.thresholdNORMAL) { |
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// if the time since the last alert is more than the time for |
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// its timeout, fire an alert, escalate the alert |
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long timeout = reg.getLastAlertTimeout(attributeNum); |
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if ((timeout > 0) && (reg.getTimeLastSent(attributeNum) > 0)) { |
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if((System.currentTimeMillis() - reg.getTimeLastSent(attributeNum)) > timeout) { |
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int lastAlert = reg.getLastAlertLevel(attributeNum); |
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reg.escalateAlert(attributeNum); |
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reg.setTimeLastSent(attributeNum, System.currentTimeMillis()); |
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reg.setLastAlertTimeout(attributeNum, reg.getAlertTimeout(reg.getLastAlertLevel(attributeNum), attributeNum)); |
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fireAlert(reg, lastAlert, packet, attributeNum); |
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} |
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// if we don't have a timeout configured...we got STRAIGHT to the next level |
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} else { |
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int lastAlert = reg.getLastAlertLevel(attributeNum); |
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reg.escalateAlert(attributeNum); |
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reg.setTimeLastSent(attributeNum, System.currentTimeMillis()); |
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reg.setLastAlertTimeout(attributeNum, reg.getAlertTimeout(reg.getLastAlertLevel(attributeNum), attributeNum)); |
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fireAlert(reg, lastAlert, packet, attributeNum); |
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} |
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// we must be on ok, check the timeout value for this |
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} else { |
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// if we were on an OK alert before, then we don't do anything |
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// but if we weren't we only set OK, once the timout of the last |
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// alert has occourd |
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if (reg.getLastAlertLevel(attributeNum) != Alert.alertOK) { |
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long timeout = reg.getLastAlertTimeout(attributeNum); |
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if ((timeout > 0) && (reg.getTimeLastSent(attributeNum) > 0)) { |
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if ((System.currentTimeMillis() - reg.getTimeLastSent(attributeNum)) > timeout) { |
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int lastAlert = reg.getLastAlertLevel(attributeNum); |
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reg.setLastAlertLevel(attributeNum, Alert.alertOK); |
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reg.setTimeLastSent(attributeNum, System.currentTimeMillis()); |
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reg.setLastAlertTimeout(attributeNum, timeout); |
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fireAlert(reg, lastAlert, packet, attributeNum); |
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} |
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} |
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} |
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} |
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} |
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String source = packet.getParam("packet.attributes.machine_name"); |
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if (!_hosts.containsKey(source)) { |
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HashMap attributeRegisters = new HashMap(); |
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initAttributeRegsiters(source, attributeRegisters); |
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_hosts.put(source, attributeRegisters); |
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} |
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HashMap attributeRegisters = (HashMap) _hosts.get(source); |
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for(int attributeNum = 0; attributeNum < _attributes.length; attributeNum++) { |
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Register reg = (Register) attributeRegisters.get(_attributes[attributeNum]); |
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// find out the threshold level we're at |
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String attribute = _attributes[attributeNum]; |
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String attributeName = _attributeNames[attributeNum]; |
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String currentValue = packet.getParam(attribute); |
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int newThreshold = checkAttributeThreshold(currentValue, reg); |
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processAlert(newThreshold, attributeName, reg, source, currentValue); |
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} |
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} |
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.NameFormat class |
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* This uses the uk.org.iscream.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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} |
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//---PRIVATE METHODS--- |
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/** |
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* Checks a piece of current data, and returns the |
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* threshold it breaches, if any. |
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* |
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* @param attributeString a String representing the current data value |
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* @param reg the Register for the host |
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* @return the threshold level breached, if any |
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*/ |
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private int checkAttributeThreshold(String attributeString, Register reg) { |
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for(int thresholdLevel = Alert.thresholdLevels.length - 1; thresholdLevel >= 0; thresholdLevel--) { |
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if (reg.getThreshold(thresholdLevel) != -1.0) { |
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} |
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} |
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} |
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return 0; |
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return Alert.thresholdNORMAL; |
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} |
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private void fireAlert(Register reg, int lastAlert, XMLPacket packet, int attributeNum) { |
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int alertLevel = reg.getLastAlertLevel(attributeNum); |
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int thresholdLevel = reg.getLastThresholdLevel(attributeNum); |
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String source = packet.getParam("packet.attributes.machine_name"); |
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String currentValue = packet.getParam(_attributes[attributeNum]); |
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String attributeName = _attributeNames[attributeNum]; |
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String thresholdValue = Double.toString(reg.getThreshold(thresholdLevel)); |
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String timeout = Long.toString(reg.getAlertTimeout(reg.getLastAlertLevel(attributeNum), attributeNum) / 1000); |
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if (thresholdLevel == Alert.thresholdNORMAL) { |
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thresholdValue = "-"; |
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/** |
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* Initialises a HashMap of Registers with the current list |
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* of attributes. This is only used if we are looking at more |
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* than one distinct attribute. |
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* |
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* @param source the host we are looking at |
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* @param attributeRegisters a HashMap to put the new Registers in |
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*/ |
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private void initAttributeRegsiters(String source, HashMap attributeRegisters) { |
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for(int attributeNum = 0; attributeNum < _attributes.length; attributeNum++) { |
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String attributeName = _attributes[attributeNum].substring(_attributes[attributeNum].lastIndexOf(".") + 1); |
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attributeRegisters.put(_attributes[attributeNum], new Register(source, _name, attributeName)); |
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} |
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if (alertLevel == Alert.alertOK) { |
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timeout = "0"; |
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} |
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Alert alert = new Alert(alertLevel, lastAlert, thresholdLevel, source, thresholdValue, currentValue, attributeName, timeout, reg.getInitialAlertTime(attributeNum)); |
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_alerterQueue.add(alert); |
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_logger.write(toString(), Logger.DEBUG, "Fired alert for source:" + source + " at alert level:" + Alert.alertLevels[alertLevel] + " on:" + attributeName + " for threshold level:" + Alert.thresholdLevels[thresholdLevel] + " at:" + currentValue + " exceeding threshold of:" +thresholdValue + " next alert sent in:" + timeout + "secs"); |
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} |
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//---ACCESSOR/MUTATOR METHODS--- |
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/** |
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* Returns a reference to a specific Queue for this |
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* monitor. This Queue returns only the data packets |
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* (based on type) that we want too look at. |
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* |
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* @return a reference to a Queue |
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*/ |
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protected Queue getQueue() { |
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return MonitorManager.getInstance().getDataQueue(); |
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} |
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//---ATTRIBUTES--- |
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* be changed to null for utility classes. |
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*/ |
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private String _name = "CPU"; |
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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* A HashMap of Registers (or groups of Registers), one |
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* for each host we're monitoring. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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private HashMap _hosts = new HashMap(); |
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private Queue _alerterQueue = ClientMain._alerterQueue; |
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/** |
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* A reference to the configuration proxy in use |
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* An array of attributes which we will be checking. |
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*/ |
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private ConfigurationProxy _cp = ConfigurationProxy.getInstance(); |
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private HashMap _hosts = new HashMap(); |
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private String[] _attributes = { "packet.cpu.user", "packet.cpu.kernel", "packet.cpu.iowait", "packet.cpu.swap" }; |
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/** |
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* An array of "nice names" for the attributes in _attributes. |
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*/ |
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private String[] _attributeNames = {"User CPU", "Kernel CPU", "I/O Wait CPU", "Swap CPU"}; |
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//---STATIC ATTRIBUTES--- |
