Package org.apache.hadoop.hbase.util

Class YammerHistogramUtils

java.lang.Object

org.apache.hadoop.hbase.util.YammerHistogramUtils

@Private
public final class YammerHistogramUtils
extends Object

Utility functions for working with Yammer Metrics.

Field Summary

Fields

Modifier and Type	Field	Description
private static DecimalFormat	DOUBLE_FORMAT	Used formatting doubles so only two places after decimal point.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	YammerHistogramUtils()

Method Summary

Modifier and Type	Method	Description
static String	getHistogramReport(com.codahale.metrics.Histogram hist)	Returns a summary of hist.
static String	getPrettyHistogramReport(com.codahale.metrics.Histogram h)	Returns pretty summary of hist.
static String	getShortHistogramReport(com.codahale.metrics.Histogram hist)	Returns an abbreviated summary of hist.
static com.codahale.metrics.Histogram	newHistogram(com.codahale.metrics.Reservoir sample)	Create a new Histogram instance.

Methods inherited from class java.lang.Object

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

Field Details

DOUBLE_FORMAT

private static DecimalFormat DOUBLE_FORMAT

Used formatting doubles so only two places after decimal point.

Constructor Details

YammerHistogramUtils

private YammerHistogramUtils()

Method Details

newHistogram

public static com.codahale.metrics.Histogram newHistogram(com.codahale.metrics.Reservoir sample)

Create a new Histogram instance. These constructors are not public in 2.2.0, so we use reflection to find them.

getShortHistogramReport

public static String getShortHistogramReport(com.codahale.metrics.Histogram hist)

Returns an abbreviated summary of hist.

getHistogramReport

public static String getHistogramReport(com.codahale.metrics.Histogram hist)

Returns a summary of hist.

getPrettyHistogramReport

public static String getPrettyHistogramReport(com.codahale.metrics.Histogram h)

Returns pretty summary of hist.