com.yammer.metrics.core

Class WavefrontHistogram

java.lang.Object

com.yammer.metrics.core.Histogram

com.yammer.metrics.core.WavefrontHistogram

All Implemented Interfaces:

com.yammer.metrics.core.Metric, com.yammer.metrics.core.Sampling, com.yammer.metrics.core.Summarizable

public class WavefrontHistogram
extends com.yammer.metrics.core.Histogram
implements com.yammer.metrics.core.Metric

Wavefront implementation of Histogram.

Author:

Tim Schmidt (tim@wavefront.com).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WavefrontHistogram.MinuteBin

Method Summary

Modifier and Type	Method and Description
List<WavefrontHistogram.MinuteBin>	bins(boolean clear) Aggregates all the bins prior to the current minute This is because threads might be updating the current minute bin while the bins() method is invoked
void	bulkUpdate(List<Double> means, List<Integer> counts) Bulk-update this histogram with a set of centroids.
void	clear() Note - We override the behavior of the clear() method.
long	count()
static WavefrontHistogram	get(com.yammer.metrics.core.MetricName metricName)
static WavefrontHistogram	get(com.yammer.metrics.core.MetricsRegistry registry, com.yammer.metrics.core.MetricName metricName)
static WavefrontHistogram	get(com.yammer.metrics.core.MetricsRegistry registry, com.yammer.metrics.core.MetricName metricName, java.util.function.Supplier<Long> clock)
com.yammer.metrics.stats.Snapshot	getSnapshot()
double	max()
double	mean()
double	min()
<T> void	processWith(com.yammer.metrics.core.MetricProcessor<T> metricProcessor, com.yammer.metrics.core.MetricName metricName, T t)
void	update(int value)
void	update(long value)

Methods inherited from class com.yammer.metrics.core.Histogram

stdDev, sum

Methods inherited from class java.lang.Object

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

Method Detail

get

public static WavefrontHistogram get(com.yammer.metrics.core.MetricName metricName)

get

public static WavefrontHistogram get(com.yammer.metrics.core.MetricsRegistry registry,
                                     com.yammer.metrics.core.MetricName metricName)

get

public static WavefrontHistogram get(com.yammer.metrics.core.MetricsRegistry registry,
                                     com.yammer.metrics.core.MetricName metricName,
                                     java.util.function.Supplier<Long> clock)

bins

public List<WavefrontHistogram.MinuteBin> bins(boolean clear)

Aggregates all the bins prior to the current minute This is because threads might be updating the current minute bin while the bins() method is invoked

Parameters:

clear - if set to true, will clear the older bins

Returns:

returns aggregated collection of all the bins prior to the current minute

update

public void update(int value)

Overrides:

update in class com.yammer.metrics.core.Histogram

bulkUpdate

public void bulkUpdate(List<Double> means,
                       List<Integer> counts)

Bulk-update this histogram with a set of centroids.

Parameters:

means - the centroid values

counts - the centroid weights/sample counts

update

public void update(long value)

Overrides:

update in class com.yammer.metrics.core.Histogram

mean

public double mean()

Specified by:

mean in interface com.yammer.metrics.core.Summarizable

Overrides:

mean in class com.yammer.metrics.core.Histogram

min

public double min()

Specified by:

min in interface com.yammer.metrics.core.Summarizable

Overrides:

min in class com.yammer.metrics.core.Histogram

max

public double max()

Specified by:

max in interface com.yammer.metrics.core.Summarizable

Overrides:

max in class com.yammer.metrics.core.Histogram

count

public long count()

Overrides:

count in class com.yammer.metrics.core.Histogram

clear

public void clear()

Note - We override the behavior of the clear() method. In the super class, we would clear all the recorded values.

Overrides:

clear in class com.yammer.metrics.core.Histogram

getSnapshot

public com.yammer.metrics.stats.Snapshot getSnapshot()

Specified by:

getSnapshot in interface com.yammer.metrics.core.Sampling

Overrides:

getSnapshot in class com.yammer.metrics.core.Histogram

processWith

public <T> void processWith(com.yammer.metrics.core.MetricProcessor<T> metricProcessor,
                            com.yammer.metrics.core.MetricName metricName,
                            T t)
                     throws Exception

Specified by:

processWith in interface com.yammer.metrics.core.Metric

Overrides:

processWith in class com.yammer.metrics.core.Histogram

Throws:

Exception