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Class MonitorNotification

java.lang.Object
java.util.EventObject
javax.management.Notification
javax.management.monitor.MonitorNotification
All Implemented Interfaces:
Serializable
public class MonitorNotification extends Notification
Provides definitions of the notifications sent by monitor MBeans.

The notification source and a set of parameters concerning the monitor MBean's state need to be specified when creating a new object of this class. The list of notifications fired by the monitor MBeans is the following:

  • Common to all kind of monitors:
    • The observed object is not registered in the MBean server.
    • The observed attribute is not contained in the observed object.
    • The type of the observed attribute is not correct.
    • Any exception (except the cases described above) occurs when trying to get the value of the observed attribute.
  • Common to the counter and the gauge monitors:
    • The threshold high or threshold low are not of the same type as the gauge (gauge monitors).
    • The threshold or the offset or the modulus are not of the same type as the counter (counter monitors).
  • Counter monitors only:
    • The observed attribute has reached the threshold value.
  • Gauge monitors only:
    • The observed attribute has exceeded the threshold high value.
    • The observed attribute has exceeded the threshold low value.
  • String monitors only:
    • The observed attribute has matched the "string to compare" value.
    • The observed attribute has differed from the "string to compare" value.
Since:
1.5
See Also:

Field Summary

Modifier and Type Field Description
static final String OBSERVED_ATTRIBUTE_ERROR
Notification type denoting that the observed attribute is not contained in the observed object.
static final String OBSERVED_ATTRIBUTE_TYPE_ERROR
Notification type denoting that the type of the observed attribute is not correct.
static final String OBSERVED_OBJECT_ERROR
Notification type denoting that the observed object is not registered in the MBean server.
static final String RUNTIME_ERROR
Notification type denoting that a non-predefined error type has occurred when trying to get the value of the observed attribute.
static final String STRING_TO_COMPARE_VALUE_DIFFERED
Notification type denoting that the observed attribute has differed from the "string to compare" value.
static final String STRING_TO_COMPARE_VALUE_MATCHED
Notification type denoting that the observed attribute has matched the "string to compare" value.
static final String THRESHOLD_ERROR
Notification type denoting that the type of the thresholds, offset or modulus is not correct.
static final String THRESHOLD_HIGH_VALUE_EXCEEDED
Notification type denoting that the observed attribute has exceeded the threshold high value.
static final String THRESHOLD_LOW_VALUE_EXCEEDED
Notification type denoting that the observed attribute has exceeded the threshold low value.
static final String THRESHOLD_VALUE_EXCEEDED
Notification type denoting that the observed attribute has reached the threshold value.

Fields declared in class javax.management.Notification

source

Method Summary

Modifier and Type Method Description
Object getDerivedGauge()
Gets the derived gauge of this monitor notification.
String getObservedAttribute()
Gets the observed attribute of this monitor notification.
ObjectName getObservedObject()
Gets the observed object of this monitor notification.
Object getTrigger()
Gets the threshold/string (depending on the monitor type) that triggered off this monitor notification.

Methods declared in class javax.management.Notification

getMessage, getSequenceNumber, getTimeStamp, getType, getUserData, setSequenceNumber, setSource, setTimeStamp, setUserData, toString

Methods declared in class java.util.EventObject

getSource

Methods declared in class java.lang.Object

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

Field Details

OBSERVED_OBJECT_ERROR

public static final String OBSERVED_OBJECT_ERROR
Notification type denoting that the observed object is not registered in the MBean server. This notification is fired by all kinds of monitors.
The value of this notification type is jmx.monitor.error.mbean.
See Also:

OBSERVED_ATTRIBUTE_ERROR

public static final String OBSERVED_ATTRIBUTE_ERROR
Notification type denoting that the observed attribute is not contained in the observed object. This notification is fired by all kinds of monitors.
The value of this notification type is jmx.monitor.error.attribute.
See Also:

OBSERVED_ATTRIBUTE_TYPE_ERROR

public static final String OBSERVED_ATTRIBUTE_TYPE_ERROR
Notification type denoting that the type of the observed attribute is not correct. This notification is fired by all kinds of monitors.
The value of this notification type is jmx.monitor.error.type.
See Also:

THRESHOLD_ERROR

public static final String THRESHOLD_ERROR
Notification type denoting that the type of the thresholds, offset or modulus is not correct. This notification is fired by counter and gauge monitors.
The value of this notification type is jmx.monitor.error.threshold.
See Also:

RUNTIME_ERROR

public static final String RUNTIME_ERROR
Notification type denoting that a non-predefined error type has occurred when trying to get the value of the observed attribute. This notification is fired by all kinds of monitors.
The value of this notification type is jmx.monitor.error.runtime.
See Also:

THRESHOLD_VALUE_EXCEEDED

public static final String THRESHOLD_VALUE_EXCEEDED
Notification type denoting that the observed attribute has reached the threshold value. This notification is only fired by counter monitors.
The value of this notification type is jmx.monitor.counter.threshold.
See Also:

THRESHOLD_HIGH_VALUE_EXCEEDED

public static final String THRESHOLD_HIGH_VALUE_EXCEEDED
Notification type denoting that the observed attribute has exceeded the threshold high value. This notification is only fired by gauge monitors.
The value of this notification type is jmx.monitor.gauge.high.
See Also:

THRESHOLD_LOW_VALUE_EXCEEDED

public static final String THRESHOLD_LOW_VALUE_EXCEEDED
Notification type denoting that the observed attribute has exceeded the threshold low value. This notification is only fired by gauge monitors.
The value of this notification type is jmx.monitor.gauge.low.
See Also:

STRING_TO_COMPARE_VALUE_MATCHED

public static final String STRING_TO_COMPARE_VALUE_MATCHED
Notification type denoting that the observed attribute has matched the "string to compare" value. This notification is only fired by string monitors.
The value of this notification type is jmx.monitor.string.matches.
See Also:

STRING_TO_COMPARE_VALUE_DIFFERED

public static final String STRING_TO_COMPARE_VALUE_DIFFERED
Notification type denoting that the observed attribute has differed from the "string to compare" value. This notification is only fired by string monitors.
The value of this notification type is jmx.monitor.string.differs.
See Also:

Method Details

getObservedObject

public ObjectName getObservedObject()
Gets the observed object of this monitor notification.
Returns:
The observed object.

getObservedAttribute

public String getObservedAttribute()
Gets the observed attribute of this monitor notification.
Returns:
The observed attribute.

getDerivedGauge

public Object getDerivedGauge()
Gets the derived gauge of this monitor notification.
Returns:
The derived gauge.

getTrigger

public Object getTrigger()
Gets the threshold/string (depending on the monitor type) that triggered off this monitor notification.
Returns:
The trigger.

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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/MonitorNotification.html