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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2002 i-scream |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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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.cms.server.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.cms.server.client.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.util.*; |
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import uk.org.iscream.cms.server.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 CPU__Monitor() { |
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_alerterQueue = ClientMain._alerterQueue; |
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// get the configuration for this plug-in |
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Configuration config = _refman.getCM().getConfiguration(_name); |
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_levels = new double[(Alert.alerts).length]; |
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for (int x = 0; x < Alert.alerts.length; x++) { |
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try { |
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_levels[x] = Double.parseDouble(config.getProperty("Monitor.CPU.level." + x)); |
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} catch (NumberFormatException e) { |
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_logger.write(toString(), Logger.ERROR, "Invalid configured value for alert level " + x + " - ignoring level."); |
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_levels[x] = -1; |
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} catch (org.omg.CORBA.MARSHAL e2) { |
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_logger.write(toString(), Logger.WARNING, "Alert level " + x + " unused."); |
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_levels[x] = -1; |
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} |
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} |
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} |
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|
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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(_attributes.length)); |
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} |
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Register reg = (Register) _hosts.get(source); |
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for(int x = 0; x < _attributes.length; x++) { |
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int result = checkAttribute(packet, _attributes[x]); |
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if (result != reg.getRegister(x)) { |
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reg.setRegister(x, result); |
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fireAlert(result, source, packet.getParam(_attributes[x]), _attributeNames[x]); |
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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(!checkBooleanConfig("Host." + source, "Monitor." + _name + ".enable")) { |
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return; |
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} |
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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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|
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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.cms.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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/** |
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* return the String representation of what the filter does |
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* return the String representation of what the monitor does |
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*/ |
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public String getDescription(){ |
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return DESC; |
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} |
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//---PRIVATE METHODS--- |
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private int checkAttribute(XMLPacket packet, String packetAttribute) { |
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for(int x= _levels.length; x > 0; x--) { |
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if (_levels[x] != -1) { |
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if(packet.getParam(packetAttribute) != null) { |
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double attribute = Double.parseDouble(packet.getParam(packetAttribute)); |
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if (_levels[x] < attribute) return x; |
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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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if(attributeString != null) { |
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try { |
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double attribute = Double.parseDouble(attributeString); |
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if (reg.getThreshold(thresholdLevel) < attribute) return thresholdLevel; |
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} catch (NumberFormatException e) { |
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// we got some duff data in the packet, but we shouldn't have |
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_logger.write(toString(), Logger.DEBUG, "possible errenous packet data, should be double value - " + attributeString); |
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} |
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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(int alertLevel, String source, String currentValue, String attributeName) { |
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String thresholdValue = Double.toString(_levels[alertLevel]); |
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Alert alert = new Alert(alertLevel, source, thresholdValue, currentValue, attributeName); |
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_alerterQueue.add(alert); |
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_logger.write(toString(), Logger.DEBUG, "Fired alert for source:" + source + " at alert level:" + alertLevel + " on:" + attributeName + " at:" + currentValue + " exceeding threshold:" + _levels[alertLevel]); |
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|
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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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} |
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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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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = ClientMain.NAME; |
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private String _name = "CPU"; |
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|
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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 double[] _levels; |
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private Queue _alerterQueue; |
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/** |
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* A reference to the reference manager in use |
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* An array of attributes which we will be checking. |
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*/ |
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private ReferenceManager _refman = ReferenceManager.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--- |
