com.alibaba.csp.sentinel.slots.statistic.metric

Class HotParameterLeapArray

java.lang.Object

com.alibaba.csp.sentinel.slots.statistic.base.LeapArray<ParamMapBucket>

com.alibaba.csp.sentinel.slots.statistic.metric.HotParameterLeapArray

public class HotParameterLeapArray
extends LeapArray<ParamMapBucket>

The fundamental data structure for frequent parameters statistics in a time window.

Since:

0.2.0

Author:

Eric Zhao

Field Summary

Fields inherited from class com.alibaba.csp.sentinel.slots.statistic.base.LeapArray

array, intervalInMs, sampleCount, windowLengthInMs

Constructor Summary

Constructors

Constructor and Description
HotParameterLeapArray(int sampleCount, int intervalInMs)

Method Summary

Modifier and Type	Method and Description
void	addValue(RollingParamEvent event, int count, Object value) Add event count for specific parameter value.
double	getRollingAvg(RollingParamEvent event, Object value)
long	getRollingSum(RollingParamEvent event, Object value)
Map<Object,Double>	getTopValues(RollingParamEvent event, int number) Get "top-N" value-QPS map of provided event.
ParamMapBucket	newEmptyBucket(long timeMillis)
protected WindowWrap<ParamMapBucket>	resetWindowTo(WindowWrap<ParamMapBucket> w, long startTime)

Methods inherited from class com.alibaba.csp.sentinel.slots.statistic.base.LeapArray

addWaiting, calculateWindowStart, currentWaiting, currentWindow, currentWindow, debug, getIntervalInMs, getIntervalInSecond, getPreviousWindow, getPreviousWindow, getSampleCount, getValidHead, getWindowValue, isWindowDeprecated, isWindowDeprecated, list, list, listAll, values, values

Methods inherited from class java.lang.Object

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

Constructor Detail

HotParameterLeapArray

public HotParameterLeapArray(int sampleCount,
                             int intervalInMs)

Method Detail

newEmptyBucket

public ParamMapBucket newEmptyBucket(long timeMillis)

Specified by:

newEmptyBucket in class LeapArray<ParamMapBucket>

resetWindowTo

protected WindowWrap<ParamMapBucket> resetWindowTo(WindowWrap<ParamMapBucket> w,
                                                   long startTime)

Specified by:

resetWindowTo in class LeapArray<ParamMapBucket>

addValue

public void addValue(RollingParamEvent event,
                     int count,
                     Object value)

Add event count for specific parameter value.

Parameters:

event - target event

count - count to add

value - parameter value

getTopValues

public Map<Object,Double> getTopValues(RollingParamEvent event,
                                       int number)

Get "top-N" value-QPS map of provided event.

Parameters:

event - target event

number - max number of values

Returns:

"top-N" value map

getRollingSum

public long getRollingSum(RollingParamEvent event,
                          Object value)

getRollingAvg

public double getRollingAvg(RollingParamEvent event,
                            Object value)