org.apache.hadoop.metrics2.lib

类 MetricMutableStat

java.lang.Object

org.apache.hadoop.metrics2.lib.MetricMutable

org.apache.hadoop.metrics2.lib.MetricMutableStat

public class MetricMutableStat
extends MetricMutable

A mutable metric with stats Useful for keep throughput/latency stats. e.g., new MetricMutableStat("rpcName", "rpcName stats", "ops", "time");

字段概要

从类继承的字段 org.apache.hadoop.metrics2.lib.MetricMutable

description, name

构造器概要

构造器

构造器和说明
MetricMutableStat(String name, String description, String sampleName, String valueName) Construct a snapshot stat metric with extended stat off by default
MetricMutableStat(String name, String description, String sampleName, String valueName, boolean extended) Construct a sample statistics metric

方法概要

方法

限定符和类型	方法和说明
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
void	resetMinMax() Reset the all time min max of the metric
void	snapshot(MetricsRecordBuilder builder, boolean all) Get a snapshot/snapshot of the metric

从类继承的方法 org.apache.hadoop.metrics2.lib.MetricMutable

changed, clearChanged, setChanged, snapshot

从类继承的方法 java.lang.Object

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

构造器详细资料

MetricMutableStat

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

Construct a sample statistics metric

参数:

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.

MetricMutableStat

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

Construct a snapshot stat metric with extended stat off by default

参数:

name - of the metric

description - of the metric

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

valueName - of the metric (e.g. "time", "latency")

方法详细资料

add

public void add(long numSamples,
       long sum)

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

参数:

numSamples - number of samples

sum - of the samples

add

public void add(long value)

Add a snapshot to the metric

参数:

value - of the metric

snapshot

public void snapshot(MetricsRecordBuilder builder,
            boolean all)

从类复制的说明: MetricMutable

Get a snapshot/snapshot of the metric

指定者:

snapshot 在类中 MetricMutable

参数:

builder - the metrics record builder

all - if true, snapshot unchanged metrics as well

resetMinMax

public void resetMinMax()

Reset the all time min max of the metric