org.eclipse.jetty.monitor.triggers
Class AttrEventTrigger<TYPE extends Comparable<TYPE>>

java.lang.Object
  org.eclipse.jetty.monitor.jmx.EventTrigger
      org.eclipse.jetty.monitor.triggers.AttrEventTrigger<TYPE>

Direct Known Subclasses:

EqualToAttrEventTrigger, GreaterThanAttrEventTrigger, GreaterThanOrEqualToAttrEventTrigger, JavaMonitorTrigger, LessThanAttrEventTrigger, LessThanOrEqualToAttrEventTrigger, RangeAttrEventTrigger, RangeInclAttrEventTrigger

public class AttrEventTrigger<TYPE extends Comparable<TYPE>>
extends EventTrigger

AttrEventTrigger Event trigger that polls a value of an MXBean attribute and matches every invocation of this trigger. It can be used to send notifications of the value of an attribute of the MXBean being polled at a certain interval, or as a base class for the event triggers that match the value of an attribute of the MXBean being polled against some specified criteria.

Field Summary

protected String	_attributeName
protected String	_objectName
protected Map<Long,EventState<TYPE>>	_states

Constructor Summary

AttrEventTrigger(ObjectName nameObject, String attributeName)
Construct event trigger and specify the MXBean attribute that will be polled by this event trigger.

AttrEventTrigger(String objectName, String attributeName)
Construct event trigger and specify the MXBean attribute that will be polled by this event trigger.

Method Summary

protected String	getNameString() Returns the string representation of this event trigger in the format "[object_name:attribute_name]".
protected boolean	getSaveAll()
EventState<TYPE>	getState(long timestamp) Retrieve the event state associated with specified invocation of the event trigger match method.
protected TYPE	getValue(CompositeData compValue, String fieldName)
boolean	match(Comparable<TYPE> value) Verify if the event trigger conditions are in the appropriate state for an event to be triggered.
boolean	match(long timestamp) Verify if the event trigger conditions are in the appropriate state for an event to be triggered.
String	toString() Returns the string representation of this event trigger in the format "[object_name:attribute_name]".

Methods inherited from class org.eclipse.jetty.monitor.jmx.EventTrigger

getID

Methods inherited from class java.lang.Object

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

Field Detail

_objectName

protected final String _objectName

_attributeName

protected final String _attributeName

_states

protected Map<Long,EventState<TYPE extends Comparable<TYPE>>> _states

Constructor Detail

AttrEventTrigger

public AttrEventTrigger(String objectName,
                        String attributeName)
                 throws MalformedObjectNameException,
                        IllegalArgumentException

Construct event trigger and specify the MXBean attribute that will be polled by this event trigger.

Parameters:

objectName - object name of an MBean to be polled

attributeName - name of an MBean attribute to be polled

Throws:

MalformedObjectNameException

IllegalArgumentException

AttrEventTrigger

public AttrEventTrigger(ObjectName nameObject,
                        String attributeName)
                 throws IllegalArgumentException

Construct event trigger and specify the MXBean attribute that will be polled by this event trigger.

Parameters:

nameObject - object name of an MBean to be polled

attributeName - name of an MBean attribute to be polled

Throws:

IllegalArgumentException

Method Detail

match

public final boolean match(long timestamp)
                    throws Exception

Verify if the event trigger conditions are in the appropriate state for an event to be triggered. This event trigger uses the match(Comparable) method to compare the value of the MXBean attribute to the conditions specified by the subclasses.

Specified by:

match in class EventTrigger

Returns:

true to trigger an event

Throws:

Exception

See Also:

EventTrigger.match(long)

match

public boolean match(Comparable<TYPE> value)

Verify if the event trigger conditions are in the appropriate state for an event to be triggered. Allows subclasses to override the default behavior that matches every invocation of this trigger

getState

public final EventState<TYPE> getState(long timestamp)

Retrieve the event state associated with specified invocation of the event trigger match method.

Specified by:

getState in class EventTrigger

Parameters:

timestamp - time stamp associated with invocation

Returns:

event state or null if not found

See Also:

EventTrigger.getState(long)

toString

public String toString()

Returns the string representation of this event trigger in the format "[object_name:attribute_name]".

Overrides:

toString in class Object

Returns:

string representation of the event trigger

See Also:

Object.toString()

getNameString

protected String getNameString()

Returns the string representation of this event trigger in the format "[object_name:attribute_name]". Allows subclasses to override the name string used to identify this event trigger in the event state object as well as string representation of the subclasses.

Returns:

string representation of the event trigger

getSaveAll

protected boolean getSaveAll()

getValue

protected TYPE getValue(CompositeData compValue,
                        String fieldName)