Package org.apache.hadoop.fs.statistics

Interface IOStatisticsSetters

All Superinterfaces:

IOStatistics

All Known Subinterfaces:

IOStatisticsStore

All Known Implementing Classes:

ForwardingIOStatisticsStore, IOStatisticsSnapshot

@Public
@Evolving
public interface IOStatisticsSetters
extends IOStatistics

Setter for IOStatistics entries. These operations have been in the read/write API IOStatisticsStore since IOStatistics was added; extracting into its own interface allows for IOStatisticsSnapshot to also support it. These are the simple setters, they don't provide for increments, decrements, calculation of min/max/mean etc.

Since:

The interface and IOStatisticsSnapshot support was added after Hadoop 3.3.5

Field Summary

Fields inherited from interface org.apache.hadoop.fs.statistics.IOStatistics

MAX_UNSET_VALUE, MIN_UNSET_VALUE

Method Summary

Modifier and Type	Method	Description
void	setCounter(java.lang.String key, long value)	Set a counter.
void	setGauge(java.lang.String key, long value)	Set a gauge.
void	setMaximum(java.lang.String key, long value)	Set a maximum.
void	setMeanStatistic(java.lang.String key, MeanStatistic value)	Set a mean statistic to a given value.
void	setMinimum(java.lang.String key, long value)	Set a minimum.

Methods inherited from interface org.apache.hadoop.fs.statistics.IOStatistics

counters, gauges, maximums, meanStatistics, minimums

Method Detail

setCounter

void setCounter(java.lang.String key,
                long value)

Set a counter. No-op if the counter is unknown.

Parameters:

key - statistics key

value - value to set

setGauge

void setGauge(java.lang.String key,
              long value)

Set a gauge.

Parameters:

key - statistics key

value - value to set

setMaximum

void setMaximum(java.lang.String key,
                long value)

Set a maximum.

Parameters:

key - statistics key

value - value to set

setMinimum

void setMinimum(java.lang.String key,
                long value)

Set a minimum.

Parameters:

key - statistics key

value - value to set

setMeanStatistic

void setMeanStatistic(java.lang.String key,
                      MeanStatistic value)

Set a mean statistic to a given value.

Parameters:

key - statistic key

value - new value.