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Class StringMonitor

All Implemented Interfaces:
MBeanRegistration, MonitorMBean, StringMonitorMBean, NotificationBroadcaster, NotificationEmitter 
public class StringMonitor
extends Monitor
implements StringMonitorMBean

Defines a monitor MBean designed to observe the values of a string attribute.

A string monitor sends notifications as follows:

  • if the attribute value matches the string to compare value, a match notification is sent. The notify match flag must be set to true.
    Subsequent matchings of the string to compare values do not cause further notifications unless the attribute value differs from the string to compare value.
  • if the attribute value differs from the string to compare value, a differ notification is sent. The notify differ flag must be set to true.
    Subsequent differences from the string to compare value do not cause further notifications unless the attribute value matches the string to compare value.
Since:
1.5

Fields

Fields inherited from class javax.management.monitor.Monitor

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

Constructors

StringMonitor

public StringMonitor()

Default constructor.

Methods

start

public void start()

Starts the string monitor.

Specified by:
start in interface MonitorMBean
Specified by:
start in class Monitor

stop

public void stop()

Stops the string monitor.

Specified by:
stop in interface MonitorMBean
Specified by:
stop in class Monitor

getDerivedGauge

public String getDerivedGauge(ObjectName object)

Gets the derived gauge of the specified object, if this object is contained in the set of observed MBeans, or null otherwise.

Specified by:
getDerivedGauge in interface StringMonitorMBean
Parameters:
object - the name of the MBean whose derived gauge is required.
Returns:
The derived gauge of the specified object.

getDerivedGaugeTimeStamp

public long getDerivedGaugeTimeStamp(ObjectName object)

Gets the derived gauge timestamp of the specified object, if this object is contained in the set of observed MBeans, or 0 otherwise.

Specified by:
getDerivedGaugeTimeStamp in interface StringMonitorMBean
Parameters:
object - the name of the object whose derived gauge timestamp is to be returned.
Returns:
The derived gauge timestamp of the specified object.

getDerivedGauge

@Deprecated
public String getDerivedGauge()

Deprecated. As of JMX 1.2, replaced by getDerivedGauge(ObjectName)

Returns the derived gauge of the first object in the set of observed MBeans.

Specified by:
getDerivedGauge in interface StringMonitorMBean
Returns:
The derived gauge.

getDerivedGaugeTimeStamp

@Deprecated
public long getDerivedGaugeTimeStamp()

Deprecated. As of JMX 1.2, replaced by getDerivedGaugeTimeStamp(ObjectName)

Gets the derived gauge timestamp of the first object in the set of observed MBeans.

Specified by:
getDerivedGaugeTimeStamp in interface StringMonitorMBean
Returns:
The derived gauge timestamp.

getStringToCompare

public String getStringToCompare()

Gets the string to compare with the observed attribute common to all observed MBeans.

Specified by:
getStringToCompare in interface StringMonitorMBean
Returns:
The string value.
See Also:
setStringToCompare(java.lang.String)

setStringToCompare

public void setStringToCompare(String value)
                        throws IllegalArgumentException

Sets the string to compare with the observed attribute common to all observed MBeans.

Specified by:
setStringToCompare in interface StringMonitorMBean
Parameters:
value - The string value.
Throws:
IllegalArgumentException - The specified string to compare is null.
See Also:
getStringToCompare()

getNotifyMatch

public boolean getNotifyMatch()

Gets the matching notification's on/off switch value common to all observed MBeans.

Specified by:
getNotifyMatch in interface StringMonitorMBean
Returns:
true if the string monitor notifies when matching the string to compare, false otherwise.
See Also:
setNotifyMatch(boolean)

setNotifyMatch

public void setNotifyMatch(boolean value)

Sets the matching notification's on/off switch value common to all observed MBeans.

Specified by:
setNotifyMatch in interface StringMonitorMBean
Parameters:
value - The matching notification's on/off switch value.
See Also:
getNotifyMatch()

getNotifyDiffer

public boolean getNotifyDiffer()

Gets the differing notification's on/off switch value common to all observed MBeans.

Specified by:
getNotifyDiffer in interface StringMonitorMBean
Returns:
true if the string monitor notifies when differing from the string to compare, false otherwise.
See Also:
setNotifyDiffer(boolean)

setNotifyDiffer

public void setNotifyDiffer(boolean value)

Sets the differing notification's on/off switch value common to all observed MBeans.

Specified by:
setNotifyDiffer in interface StringMonitorMBean
Parameters:
value - The differing notification's on/off switch value.
See Also:
getNotifyDiffer()

getNotificationInfo

public MBeanNotificationInfo[] getNotificationInfo()

Returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent by the string monitor.

Specified by:
getNotificationInfo in interface NotificationBroadcaster
Overrides:
getNotificationInfo in class NotificationBroadcasterSupport
Returns:
the array of possible notifications.

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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.
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