org.apache.hadoop.hbase.util

Class YammerHistogramUtils

java.lang.Object

org.apache.hadoop.hbase.util.YammerHistogramUtils

@InterfaceAudience.Private
public final class YammerHistogramUtils
extends Object

Utility functions for working with Yammer Metrics.

Field Summary

Fields

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

Constructor Summary

Constructors

Modifier	Constructor and Description
private	YammerHistogramUtils()

Method Summary

Modifier and Type	Method and Description
static String	getHistogramReport(com.codahale.metrics.Histogram hist)
static String	getPrettyHistogramReport(com.codahale.metrics.Histogram h)
static String	getShortHistogramReport(com.codahale.metrics.Histogram 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 Detail

DOUBLE_FORMAT

private static DecimalFormat DOUBLE_FORMAT

Used formatting doubles so only two places after decimal point.

Constructor Detail

YammerHistogramUtils

private YammerHistogramUtils()

Method Detail

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.