Package com.wavefront.agent.histogram

Class HistogramUtils

java.lang.Object

com.wavefront.agent.histogram.HistogramUtils

public final class HistogramUtils
extends Object

Helpers around histograms

Author:

Tim Schmidt ([email protected]).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	HistogramUtils.HistogramKeyMarshaller	(For now, a rather trivial) encoding of HistogramKey the form short length and bytes Consider using chronicle-values or making this stateful with a local byte[] / Stringbuffers to be a little more efficient about encodings.

Method Summary

Modifier and Type	Method	Description
static String	granularityToString(Granularity granularity)	Convert granularity to string.
static HistogramKey	makeKey(wavefront.report.ReportPoint point, Granularity granularity)	Generates a HistogramKey according a prototype ReportPoint and Granularity.
static void	mergeHistogram(com.tdunning.math.stats.TDigest target, wavefront.report.Histogram source)	Merges a histogram into a TDigest
static wavefront.report.ReportPoint	pointFromKeyAndDigest(HistogramKey histogramKey, AgentDigest agentDigest)	Creates a ReportPoint from a HistogramKey - AgentDigest pair

Methods inherited from class java.lang.Object

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

Method Detail

makeKey

public static HistogramKey makeKey(wavefront.report.ReportPoint point,
                                   Granularity granularity)

Generates a HistogramKey according a prototype ReportPoint and Granularity.

pointFromKeyAndDigest

public static wavefront.report.ReportPoint pointFromKeyAndDigest(HistogramKey histogramKey,
                                                                 AgentDigest agentDigest)

Creates a ReportPoint from a HistogramKey - AgentDigest pair

Parameters:

histogramKey - the key, defining metric, source, annotations, duration and start-time

agentDigest - the digest defining the centroids

Returns:

the corresponding point

granularityToString

public static String granularityToString(@Nullable
                                         Granularity granularity)

Convert granularity to string. If null, we assume we are dealing with "distribution" port.

Parameters:

granularity - granularity

Returns:

string representation

mergeHistogram

public static void mergeHistogram(com.tdunning.math.stats.TDigest target,
                                  wavefront.report.Histogram source)

Merges a histogram into a TDigest

Parameters:

target - target TDigest

source - histogram to merge