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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.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.util.ArrayList; |
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import java.util.Set; |
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import java.util.Iterator; |
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import java.text.NumberFormat; |
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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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|
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/** |
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* This Monitor watches the Disks for all machines |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: Memory__Monitor.java,v 1.2 2001/03/07 00:38:05 tdb1 Exp $ |
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*/ |
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public class Disk__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: 1.2 $"; |
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|
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public final String DESC = "Monitors all host disks."; |
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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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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, 1)); |
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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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// a tempory holder for all the disk attributes we find |
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ArrayList disks = new ArrayList(); |
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|
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// unfortunatly we need to check the whole packet |
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// to find the disks, and then get the data attributes |
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Set packetSet = packet.getSet(); |
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Iterator i = packetSet.iterator(); |
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while (i.hasNext()) { |
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String dataKey = (String) i.next(); |
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if(dataKey.startsWith("packet.disk.p")) { |
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if(!disks.contains(dataKey)) { |
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String diskNumber = ""; |
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|
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// pos is after "packet.disk.p" |
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int pos = 13; |
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while (dataKey.charAt(pos) != '.') { |
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diskNumber = diskNumber + dataKey.charAt(pos); |
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pos++; |
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} |
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|
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// add the disk to our list, with the packet data |
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|
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// used (we won't use this value - but we need it to forget about it ;) |
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disks.add("packet.disk.p" + diskNumber + ".attributes.used"); |
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|
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// device |
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disks.add("packet.disk.p" + diskNumber + ".attributes.name"); |
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String device = packet.getParam("packet.disk.p" + diskNumber + ".attributes.name"); |
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// mount point |
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disks.add("packet.disk.p" + diskNumber + ".attributes.mount"); |
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String mount = packet.getParam("packet.disk.p" + diskNumber + ".attributes.mount"); |
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|
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// these next two will be used to calculate the %age |
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// total |
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disks.add("packet.disk.p" + diskNumber + ".attributes.kbytes"); |
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String total = packet.getParam("packet.disk.p" + diskNumber + ".attributes.kbytes"); |
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// available |
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disks.add("packet.disk.p" + diskNumber + ".attributes.avail"); |
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String avail = packet.getParam("packet.disk.p" + diskNumber + ".attributes.avail"); |
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|
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// *** now process this disk *** |
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|
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// get the packet data |
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double diskTotal, diskAvail; |
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try { |
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|
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if(total==null || avail==null) { |
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throw new NumberFormatException("Disk data invalid"); |
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} |
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diskTotal = Double.parseDouble(total); |
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diskAvail = Double.parseDouble(avail); |
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} catch (NumberFormatException e) { |
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_logger.write(this.toString(), Logger.WARNING, "Received packet from "+source+" with bad disk information: "+e); |
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// don't try to continue and process, try next disk |
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break; |
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} |
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|
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// percentage of memory in use |
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double diskInUse = (1 - (diskAvail / diskTotal)) * 100; |
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int newThreshold = checkAttributeThreshold(diskInUse, 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 strDiskInUse = nf.format(diskInUse); |
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|
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// say which disk had the problem |
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String attributeName = "Disk in use % on " + mount + " (" + device + ")"; |
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|
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processAlert(newThreshold, 0, attributeName, reg, source, strDiskInUse); |
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} |
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} |
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} |
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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.ac.ukc.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 diskInUse, 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)) < diskInUse) { |
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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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//---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 = "Disk"; |
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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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} |
