Package org.opennms.netmgt.threshd

Class ThresholdEvaluatorRelativeChange

java.lang.Object

org.opennms.netmgt.threshd.ThresholdEvaluatorRelativeChange

All Implemented Interfaces:

ThresholdEvaluator

public class ThresholdEvaluatorRelativeChange
extends java.lang.Object
implements ThresholdEvaluator

Implements a relative change threshold check. A 'value' setting of less than 1.0 means that a threshold will fire if the current value is less than or equal to the previous value multiplied by the 'value' setting. A 'value' setting greater than 1.0 causes the threshold to fire if the current value is greater than or equal to the previous value multiplied by the 'value' setting. A 'value' setting of 1.0 (unity) is not allowed, as it represents no change. Zero valued samples (0.0) are ignored, as 0.0 multiplied by anything is 0.0 (if they were not ignored, an interface that gets no traffic would always trigger a threshold, for example).

Version:

$Id: $

Author:

ranger

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ThresholdEvaluatorRelativeChange.ThresholdEvaluatorStateRelativeChange

Constructor Summary

Constructors

Constructor	Description
ThresholdEvaluatorRelativeChange()

Method Summary

Modifier and Type	Method	Description
ThresholdEvaluatorState	getThresholdEvaluatorState(BaseThresholdDefConfigWrapper threshold, ThresholdingSession thresholdingSession)	getThresholdEvaluatorState
boolean	supportsType(ThresholdType type)	supportsType

Methods inherited from class java.lang.Object

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

Constructor Detail

ThresholdEvaluatorRelativeChange

public ThresholdEvaluatorRelativeChange()

Method Detail

getThresholdEvaluatorState

public ThresholdEvaluatorState getThresholdEvaluatorState(BaseThresholdDefConfigWrapper threshold,
                                                          ThresholdingSession thresholdingSession)

getThresholdEvaluatorState

Specified by:

getThresholdEvaluatorState in interface ThresholdEvaluator

Parameters:

threshold - a BaseThresholdDefConfigWrapper object.

Returns:

a ThresholdEvaluatorState object.

supportsType

public boolean supportsType(ThresholdType type)

supportsType

Specified by:

supportsType in interface ThresholdEvaluator

Parameters:

type - a String object.

Returns:

a boolean.