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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 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 logged on user count for all machines |
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* |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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public class UserCount__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 = "$Revision$"; |
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|
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public final String DESC = "Monitors number of logged on users."; |
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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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// what host are we looking at |
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String source = packet.getParam("packet.attributes.machine_name"); |
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|
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// if we don't have an entry in our HashMap, make one |
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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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// get the Register for this host |
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Register reg = (Register) _hosts.get(source); |
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|
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// get some required bits of data |
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String currentCount = packet.getParam("packet.users.count"); |
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String niceName = "User Count"; |
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int newThreshold = checkAttributeThreshold(currentCount, reg); |
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|
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// process an alert |
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processAlert(newThreshold, niceName, reg, source, currentCount); |
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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(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 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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//---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 = "UserCount"; |
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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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} |
