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//---PACKAGE DECLARATION--- |
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package uk.org.iscream.client.monitors; |
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|
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//---IMPORTS--- |
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import java.util.HashMap; |
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import java.text.NumberFormat; |
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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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/** |
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* This Monitor watches the Swap for all machines |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: Swap__Monitor.java,v 1.4 2001/03/14 23:25:29 tdb1 Exp $ |
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*/ |
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public class Swap__Monitor extends MonitorSkeleton { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public final String REVISION = "$Revision: 1.4 $"; |
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|
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public final String DESC = "Monitors Swap."; |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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//---PUBLIC METHODS--- |
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|
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public void analysePacket(XMLPacket packet) { |
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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)); |
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} |
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|
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Register reg = (Register) _hosts.get(source); |
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|
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// find out the threshold level we're at |
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String attributeName = "Swap In Use %"; |
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|
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// get the packet data |
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double swapTotal, swapFree; |
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try { |
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String total = packet.getParam("packet.swap.total"); |
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String free = packet.getParam("packet.swap.free"); |
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if(total==null || free==null) { |
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throw new NumberFormatException("Memory data invalid"); |
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} |
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swapTotal = Double.parseDouble(total); |
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swapFree = Double.parseDouble(free); |
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} catch (NumberFormatException e) { |
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_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad swap information"+e); |
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// don't try to continue and process |
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return; |
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} |
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|
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// percentage of memory in use |
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double swapInUse = (1-(swapFree / swapTotal)) * 100; |
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int newThreshold = checkAttributeThreshold(swapInUse, reg); |
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|
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// format the memoryInUse to a String |
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NumberFormat nf = NumberFormat.getInstance(); |
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nf.setMaximumFractionDigits(2); |
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nf.setMinimumFractionDigits(2); |
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String strSwapInUse = nf.format(swapInUse); |
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|
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processAlert(newThreshold, attributeName, reg, source, strSwapInUse); |
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|
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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.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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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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|
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/** |
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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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|
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//---PRIVATE METHODS--- |
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|
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private int checkAttributeThreshold(double swapInUse, 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(((double) reg.getThreshold(thresholdLevel)) < swapInUse) { |
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return thresholdLevel; |
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} |
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} |
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} |
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return Alert.thresholdNORMAL; |
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} |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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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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|
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|
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//---ATTRIBUTES--- |
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|
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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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 = "Swap"; |
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|
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/** |
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* A reference to the configuration proxy in use |
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*/ |
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private ConfigurationProxy _cp = ConfigurationProxy.getInstance(); |
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|
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private HashMap _hosts = new HashMap(); |
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|
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//---STATIC ATTRIBUTES--- |
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|
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} |
