MBeanRegistration
, GaugeMonitorMBean
, MonitorMBean
, NotificationBroadcaster
, NotificationEmitter
public class GaugeMonitor extends Monitor implements GaugeMonitorMBean
A gauge monitor observes an attribute that is continuously variable with time. A gauge monitor sends notifications as follows:
threshold high
notification
is sent. The notify high flag must be set to true
. threshold low
notification
is sent. The notify low flag must be set to true
. If the gauge difference mode is used, the value of the derived gauge is calculated as the difference between the observed gauge values for two successive observations.
The derived gauge value (V[t]) is calculated using the following method:
Byte
, Integer
, Short
, Long
, Float
, Double
).alreadyNotified, alreadyNotifieds, capacityIncrement, dbgTag, elementCount, OBSERVED_ATTRIBUTE_ERROR_NOTIFIED, OBSERVED_ATTRIBUTE_TYPE_ERROR_NOTIFIED, OBSERVED_OBJECT_ERROR_NOTIFIED, RESET_FLAGS_ALREADY_NOTIFIED, RUNTIME_ERROR_NOTIFIED, server
Constructor | Description |
---|---|
GaugeMonitor() |
Default constructor. |
Modifier and Type | Method | Description |
---|---|---|
Number |
getDerivedGauge() |
Deprecated. |
Number |
getDerivedGauge |
Gets the derived gauge of the specified object, if this object is contained in the set of observed MBeans, or null otherwise. |
long |
getDerivedGaugeTimeStamp() |
Deprecated. As of JMX 1.2, replaced by getDerivedGaugeTimeStamp(ObjectName)
|
long |
getDerivedGaugeTimeStamp |
Gets the derived gauge timestamp of the specified object, if this object is contained in the set of observed MBeans, or 0 otherwise. |
boolean |
getDifferenceMode() |
Gets the difference mode flag value common to all observed MBeans. |
Number |
getHighThreshold() |
Gets the high threshold value common to all observed MBeans. |
Number |
getLowThreshold() |
Gets the low threshold value common to all observed MBeans. |
MBeanNotificationInfo[] |
getNotificationInfo() |
Returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent by the gauge monitor. |
boolean |
getNotifyHigh() |
Gets the high notification's on/off switch value common to all observed MBeans. |
boolean |
getNotifyLow() |
Gets the low notification's on/off switch value common to all observed MBeans. |
void |
setDifferenceMode |
Sets the difference mode flag value common to all observed MBeans. |
void |
setNotifyHigh |
Sets the high notification's on/off switch value common to all observed MBeans. |
void |
setNotifyLow |
Sets the low notification's on/off switch value common to all observed MBeans. |
void |
setThresholds |
Sets the high and the low threshold values common to all observed MBeans. |
void |
start() |
Starts the gauge monitor. |
void |
stop() |
Stops the gauge monitor. |
addObservedObject, containsObservedObject, getGranularityPeriod, getObservedAttribute, getObservedObject, getObservedObjects, isActive, postDeregister, postRegister, preDeregister, preRegister, removeObservedObject, setGranularityPeriod, setObservedAttribute, setObservedObject
addNotificationListener, handleNotification, removeNotificationListener, removeNotificationListener, sendNotification
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
addObservedObject, containsObservedObject, getGranularityPeriod, getObservedAttribute, getObservedObject, getObservedObjects, isActive, removeObservedObject, setGranularityPeriod, setObservedAttribute, setObservedObject
public GaugeMonitor()
public void start()
start
in interface MonitorMBean
start
in class Monitor
public void stop()
stop
in interface MonitorMBean
stop
in class Monitor
public Number getDerivedGauge(ObjectName object)
null
otherwise.getDerivedGauge
in interface GaugeMonitorMBean
object
- the name of the MBean.public long getDerivedGaugeTimeStamp(ObjectName object)
0
otherwise.getDerivedGaugeTimeStamp
in interface GaugeMonitorMBean
object
- the name of the object whose derived gauge timestamp is to be returned.@Deprecated public Number getDerivedGauge()
getDerivedGauge(ObjectName)
getDerivedGauge
in interface GaugeMonitorMBean
@Deprecated public long getDerivedGaugeTimeStamp()
getDerivedGaugeTimeStamp(ObjectName)
getDerivedGaugeTimeStamp
in interface GaugeMonitorMBean
public Number getHighThreshold()
getHighThreshold
in interface GaugeMonitorMBean
public Number getLowThreshold()
getLowThreshold
in interface GaugeMonitorMBean
public void setThresholds(Number highValue, Number lowValue) throws IllegalArgumentException
setThresholds
in interface GaugeMonitorMBean
highValue
- The high threshold value.lowValue
- The low threshold value.IllegalArgumentException
- The specified high/low threshold is null or the low threshold is greater than the high threshold or the high threshold and the low threshold are not of the same type.public boolean getNotifyHigh()
getNotifyHigh
in interface GaugeMonitorMBean
true
if the gauge monitor notifies when exceeding the high threshold, false
otherwise.public void setNotifyHigh(boolean value)
setNotifyHigh
in interface GaugeMonitorMBean
value
- The high notification's on/off switch value.public boolean getNotifyLow()
getNotifyLow
in interface GaugeMonitorMBean
true
if the gauge monitor notifies when exceeding the low threshold, false
otherwise.public void setNotifyLow(boolean value)
setNotifyLow
in interface GaugeMonitorMBean
value
- The low notification's on/off switch value.public boolean getDifferenceMode()
getDifferenceMode
in interface GaugeMonitorMBean
true
if the difference mode is used, false
otherwise.public void setDifferenceMode(boolean value)
setDifferenceMode
in interface GaugeMonitorMBean
value
- The difference mode flag value.public MBeanNotificationInfo[] getNotificationInfo()
NotificationInfo
object containing the name of the Java class of the notification and the notification types sent by the gauge monitor.getNotificationInfo
in interface NotificationBroadcaster
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.management/javax/management/monitor/GaugeMonitor.html
getDerivedGauge(ObjectName)