CounterMonitor

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javax.management.monitor
Class CounterMonitor

java.lang.Object
  javax.management.NotificationBroadcasterSupport
      javax.management.monitor.Monitor
          javax.management.monitor.CounterMonitor

All Implemented Interfaces:: CounterMonitorMBean, javax.management.MBeanRegistration, MonitorMBean, javax.management.NotificationBroadcaster, java.io.Serializable

public class CounterMonitor
extends Monitor
implements CounterMonitorMBean

The counter monitor service.

Revisions:

20020319 Adrian Brock:

Reset the threshold when the value becomes negative in difference mode

20020326 Adrian Brock:

The spec says the modulus should be *strictly* exceeded. It appears from testing the RI, it is a mathematical definition of modulus. e.g. 10 exceeds a modulus of 10

Version:: $Revision: 1.3 $

Nested Class Summary

Nested classes inherited from class javax.management.monitor.Monitor

Field Summary

private java.lang.Number derivedGauge
          The derived gauge.

private long derivedGaugeTimeStamp
          The derived gauge timeStamp.

(package private) boolean differenceMode
          Difference mode.

(package private) java.lang.Number initialThreshold
          The last stated threshold.

private java.lang.Number lastValue
          The last value.

(package private) java.lang.Number modulus
          The modulus.

(package private) boolean notify
          Notify.

(package private) java.lang.Number offset
          The offset.

(package private) java.lang.Number threshold
          The threshold.

(package private) int THRESHOLD_ERROR_NOTIFIED
          The threshold type error has been notified.

(package private) int THRESHOLD_EXCEEDED_NOTIFIED
          The counter threshold exceeded has been notified.

Fields inherited from class javax.management.monitor.Monitor

active, alreadyNotified, dbgTag, granularityPeriod, objectName, OBSERVED_ATTRIBUTE_ERROR_NOTIFIED, OBSERVED_ATTRIBUTE_TYPE_ERROR_NOTIFIED, OBSERVED_OBJECT_ERROR_NOTIFIED, observedAttribute, observedObject, RESET_FLAGS_ALREADY_NOTIFIED, RUNTIME_ERROR_NOTIFIED, scheduler, server

Fields inherited from class javax.management.NotificationBroadcasterSupport

log

Constructor Summary

CounterMonitor()
          Default Constructor

Method Summary

(package private) java.lang.Number add(java.lang.Number value1, java.lang.Number value2)
          Add two numbers together.

java.lang.Number getDerivedGauge()
          Retrieves the derived gauge.

long getDerivedGaugeTimeStamp()
          Retrieves the derived gauge timestamp.

boolean getDifferenceMode()
          Retrieves the difference mode flag.

java.lang.Number getModulus()
          Retrieves the modulus.

javax.management.MBeanNotificationInfo[] getNotificationInfo()


boolean getNotify()
          Retrieves the notify on/off switch.

java.lang.Number getOffset()
          Retrieves the offset.

java.lang.Number getThreshold()
          Retrieves the threshold.

(package private) java.lang.Number getZero(java.lang.Number value)
          Get zero for the type passed.

(package private) void monitor(javax.management.MBeanAttributeInfo attributeInfo, java.lang.Object value)
          Perform the monitor specific processing.

(package private) void sendThresholdErrorNotification(java.lang.Object value)
          Send a threshold error event.

(package private) void sendThresholdExceededNotification(java.lang.Object value)
          Send a threshold exceeded event.

void setDifferenceMode(boolean value)
          Sets the difference mode flag.

void setModulus(java.lang.Number value)
          Sets the modulus.

void setNotify(boolean value)
          Sets the notify on/off switch.

void setOffset(java.lang.Number value)
          Sets the offset.

void setThreshold(java.lang.Number value)
          Sets the threshold.

void start()
          Starts the monitor.

(package private) java.lang.Number sub(java.lang.Number value1, java.lang.Number value2)
          Subtract two numbers.

Methods inherited from class javax.management.monitor.Monitor

getGranularityPeriod, getObservedAttribute, getObservedObject, isActive, postDeregister, postRegister, preDeregister, preRegister, runMonitor, sendAttributeErrorNotification, sendAttributeTypeErrorNotification, sendNotification, sendObjectErrorNotification, sendRuntimeErrorNotification, setGranularityPeriod, setObservedAttribute, setObservedObject, stop

Methods inherited from class javax.management.NotificationBroadcasterSupport

addNotificationListener, getListenerMap, removeNotificationListener, sendNotification

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.management.monitor.MonitorMBean

getGranularityPeriod, getObservedAttribute, getObservedObject, isActive, setGranularityPeriod, setObservedAttribute, setObservedObject, stop

Field Detail

THRESHOLD_EXCEEDED_NOTIFIED

int THRESHOLD_EXCEEDED_NOTIFIED

The counter threshold exceeded has been notified.

THRESHOLD_ERROR_NOTIFIED

int THRESHOLD_ERROR_NOTIFIED

The threshold type error has been notified.

derivedGauge

private java.lang.Number derivedGauge

The derived gauge.

lastValue

private java.lang.Number lastValue

The last value.

derivedGaugeTimeStamp

private long derivedGaugeTimeStamp

The derived gauge timeStamp.

offset

java.lang.Number offset

The offset.

modulus

java.lang.Number modulus

The modulus.

threshold

java.lang.Number threshold

The threshold.

initialThreshold

java.lang.Number initialThreshold

The last stated threshold.

differenceMode

boolean differenceMode

Difference mode.

notify

boolean notify

Notify.

Constructor Detail

CounterMonitor

public CounterMonitor()

Default Constructor

Method Detail

getNotificationInfo

public javax.management.MBeanNotificationInfo[] getNotificationInfo()

Specified by:: getNotificationInfo in interface javax.management.NotificationBroadcaster