com.sleepycat.je.utilint

Class LongAvgRateMapStat

java.lang.Object

com.sleepycat.je.utilint.BaseStat<T>

com.sleepycat.je.utilint.Stat<String>

com.sleepycat.je.utilint.MapStat<Long,LongAvgRate>

com.sleepycat.je.utilint.LongAvgRateMapStat

All Implemented Interfaces:

Serializable, Cloneable

public final class LongAvgRateMapStat
extends MapStat<Long,LongAvgRate>

A JE stat that maintains a map of individual LongAvgRate values which can be looked up with a String key, and that returns results as a formatted string.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected long	periodMillis The averaging period in milliseconds.

Fields inherited from class com.sleepycat.je.utilint.MapStat

statMap

Fields inherited from class com.sleepycat.je.utilint.Stat

definition

Constructor Summary

Constructors

Constructor and Description
LongAvgRateMapStat(StatGroup group, StatDefinition definition, long periodMillis, TimeUnit reportTimeUnit) Creates an instance of this class.

Method Summary

Modifier and Type	Method and Description
LongAvgRateMapStat	computeInterval(Stat<String> base) Creates a new map that contains entries for all keys that appear in whichever of this map or the argument is newer, with those entries updated with any values from both maps.
LongAvgRateMapStat	copy() Returns a copy of this statistic.
LongAvgRate	createStat(String key) Creates, stores, and returns a new stat for the specified key.
void	negate() Do nothing for this non-additive stat.
void	removeStat(String key) Note the removal time, so that computeInterval can tell if an empty map is newer than a non-empty one.

Methods inherited from class com.sleepycat.je.utilint.MapStat

add, clear, copyAndClear, get, getFormattedValue, getMap, isNotSet, set

Methods inherited from class com.sleepycat.je.utilint.Stat

copyAndAdd, getDefinition, toString, toStringVerbose

Methods inherited from class java.lang.Object

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

Field Detail

periodMillis

protected final long periodMillis

The averaging period in milliseconds.

Constructor Detail

LongAvgRateMapStat

public LongAvgRateMapStat(StatGroup group,
                          StatDefinition definition,
                          long periodMillis,
                          TimeUnit reportTimeUnit)

Creates an instance of this class. The definition type must be INCREMENTAL.

Parameters:

group - the owning group

definition - the associated definition

periodMillis - the sampling period in milliseconds

reportTimeUnit - the time unit for reporting rates

Method Detail

createStat

public LongAvgRate createStat(String key)

Creates, stores, and returns a new stat for the specified key.

Parameters:

key - the key

Returns:

the new stat

removeStat

public void removeStat(String key)

Note the removal time, so that computeInterval can tell if an empty map is newer than a non-empty one.

Overrides:

removeStat in class MapStat<Long,LongAvgRate>

Parameters:

key - the key

copy

public LongAvgRateMapStat copy()

Description copied from class: BaseStat

Returns a copy of this statistic.

Overrides:

copy in class Stat<String>

Returns:

a copy

computeInterval

public LongAvgRateMapStat computeInterval(Stat<String> base)

Creates a new map that contains entries for all keys that appear in whichever of this map or the argument is newer, with those entries updated with any values from both maps. Treats this map as newest if both have the same timestamp. This method does not compute negative intervals, since negation does not work properly for this non-additive stat. The base argument must be a LongAvgRateMapStat.

Specified by:

computeInterval in class Stat<String>

negate

public void negate()

Do nothing for this non-additive stat.

Specified by:

negate in class Stat<String>