uk.org.iscream.cms.server.client.monitors
Class Swap__Monitor

java.lang.Object
  java.lang.Thread
      uk.org.iscream.cms.server.client.MonitorSkeleton
          uk.org.iscream.cms.server.client.monitors.Swap__Monitor

All Implemented Interfaces:

PluginMonitor, Runnable

public class Swap__Monitor

extends MonitorSkeleton

This Monitor watches the Swap for all machines

Version:

$Id: Swap__Monitor.java,v 1.13 2003/03/10 14:39:33 tdb Exp $

Author:

$Author: tdb $

Field Summary

private ConfigurationProxy	_cp A reference to the configuration proxy in use
private HashMap	_hosts A HashMap of Registers (or groups of Registers), one for each host we're monitoring.
private String	_name This is the friendly identifier of the component this class is running in.
String	DESC A description of this monitor
String	REVISION The current CVS revision of this class

Fields inherited from class uk.org.iscream.cms.server.client.MonitorSkeleton

_alerterQueue, _logger, _qID, _running

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Swap__Monitor()

Method Summary

void	analysePacket(XMLPacket packet) Analyse a packet of data, and generate an alert if necessary.
private int	checkAttributeThreshold(double value, Register reg, boolean negateCheck) Checks a piece of current data, and returns the threshold it breaches, if any.
String	getDescription() return the String representation of what the monitor does
protected Queue	getQueue() Returns a reference to a specific Queue for this monitor.
String	toString() Overrides the Object.toString() method to provide clean logging (every class should have this).

Methods inherited from class uk.org.iscream.cms.server.client.MonitorSkeleton

getQueueId, processAlert, run

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, yield

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

REVISION

public final String REVISION

The current CVS revision of this class

See Also:

Constant Field Values

DESC

public final String DESC

A description of this monitor

See Also:

Constant Field Values

_name

private String _name

This is the friendly identifier of the component this class is running in. eg, a Filter may be called "filter1", If this class does not have an owning component, a name from the configuration can be placed here. This name could also be changed to null for utility classes.

_cp

private ConfigurationProxy _cp

A reference to the configuration proxy in use

_hosts

private HashMap _hosts

A HashMap of Registers (or groups of Registers), one for each host we're monitoring.

Constructor Detail

Swap__Monitor

public Swap__Monitor()

Method Detail

analysePacket

public void analysePacket(XMLPacket packet)

Analyse a packet of data, and generate an alert if necessary.

Specified by:

analysePacket in class MonitorSkeleton

Parameters:

packet - the XMLPacket to analyse

toString

public String toString()

Overrides the Object.toString() method to provide clean logging (every class should have this). This uses the uk.org.iscream.cms.util.NameFormat class to format the toString()

Returns:

the name of this class and its CVS revision

getDescription

public String getDescription()

return the String representation of what the monitor does

Specified by:

getDescription in interface PluginMonitor

Specified by:

getDescription in class MonitorSkeleton

Returns:

the description

checkAttributeThreshold

private int checkAttributeThreshold(double value,
                                    Register reg,
                                    boolean negateCheck)

Checks a piece of current data, and returns the threshold it breaches, if any. The option to negate the check can be used in situations where being *below* the threshold is an 'alertable' situation. In this specific case, we'd do this with kb disk checks.

Parameters:

value - the current value

reg - the Register for the host

negateCheck - whether to negate the check

Returns:

the threshold level breached, if any

getQueue

protected Queue getQueue()

Returns a reference to a specific Queue for this monitor. This Queue returns only the data packets (based on type) that we want too look at.

Specified by:

getQueue in class MonitorSkeleton

Returns:

a reference to a Queue