org.apache.hadoop.metrics2.lib

クラス MutableStat

java.lang.Object

org.apache.hadoop.metrics2.lib.MutableMetric

org.apache.hadoop.metrics2.lib.MutableStat

直系の既知のサブクラス:

MutableRate

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public class MutableStat
extends MutableMetric

A mutable metric with stats. Useful for keeping throughput/latency stats.

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
MutableStat(String name, String description, String sampleName, String valueName) Construct a snapshot stat metric with extended stat off by default
MutableStat(String name, String description, String sampleName, String valueName, boolean extended) Construct a sample statistics metric

メソッドのサマリー

修飾子とタイプ	メソッドと説明
void	add(long value) Add a snapshot to the metric
void	add(long numSamples, long sum) Add a number of samples and their sum to the running stat
org.apache.hadoop.metrics2.util.SampleStat	lastStat() Return a SampleStat object that supports calls like StdDev and Mean.
void	resetMinMax() Reset the all time min max of the metric
void	setExtended(boolean extended) Set whether to display the extended stats (stdev, min/max etc.) or not
void	snapshot(MetricsRecordBuilder builder, boolean all) Get a snapshot of the metric
String	toString()

クラスから継承されたメソッド org.apache.hadoop.metrics2.lib.MutableMetric

changed, clearChanged, setChanged, snapshot

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

MutableStat

public MutableStat(String name,
                   String description,
                   String sampleName,
                   String valueName,
                   boolean extended)

Construct a sample statistics metric

パラメータ:

name - of the metric

description - of the metric

sampleName - of the metric (e.g. "Ops")

valueName - of the metric (e.g. "Time", "Latency")

extended - create extended stats (stdev, min/max etc.) by default.

MutableStat

public MutableStat(String name,
                   String description,
                   String sampleName,
                   String valueName)

Construct a snapshot stat metric with extended stat off by default

パラメータ:

name - of the metric

description - of the metric

sampleName - of the metric (e.g. "Ops")

valueName - of the metric (e.g. "Time", "Latency")

メソッドの詳細

setExtended

public void setExtended(boolean extended)

Set whether to display the extended stats (stdev, min/max etc.) or not

パラメータ:

extended - enable/disable displaying extended stats

add

public void add(long numSamples,
                long sum)

Add a number of samples and their sum to the running stat

パラメータ:

numSamples - number of samples

sum - of the samples

add

public void add(long value)

Add a snapshot to the metric

パラメータ:

value - of the metric

snapshot

public void snapshot(MetricsRecordBuilder builder,
                     boolean all)

クラスからコピーされた説明: MutableMetric

Get a snapshot of the metric

定義:

snapshot クラス内 MutableMetric

パラメータ:

builder - the metrics record builder

all - if true, snapshot unchanged metrics as well

lastStat

public org.apache.hadoop.metrics2.util.SampleStat lastStat()

Return a SampleStat object that supports calls like StdDev and Mean.

戻り値:

SampleStat

resetMinMax

public void resetMinMax()

Reset the all time min max of the metric

toString

public String toString()

オーバーライド:

toString クラス内 Object