com.sleepycat.je.utilint

Class LongAvgRateStat

java.lang.Object

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

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

com.sleepycat.je.utilint.StatWithValueType<Long>

com.sleepycat.je.utilint.LongAvgRateStat

All Implemented Interfaces:

Serializable, Cloneable

public class LongAvgRateStat
extends StatWithValueType<Long>

A long JE stat generated from an exponential moving average over a specified time period of the rate of change in a value over time.

See Also:

Serialized Form

Field Summary

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

definition

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
void	add(long value, long time) Adds a new value to the average.
void	add(Stat<Long> other) Add the value of "other" to this stat.
void	clear() Resets the statistic to its initial state.
LongAvgRateStat	computeInterval(Stat<Long> base) Create a stat that includes the newest entries from this stat and the base stat.
LongAvgRateStat	copy() Returns a copy of this statistic.
Long	get() Returns the value of the statistic.
protected String	getFormattedValue() Returns the value of the statistic as a formatted string.
Class<Long>	getValueType() Returns the type of the value returned by the BaseStat.get() method.
boolean	isNotSet() Returns whether the statistic is in its initial state.
void	negate() Do nothing for this non-additive stat.
void	set(Long newValue) Set the stat value.

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

getForType

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

copyAndAdd, copyAndClear, getDefinition, toString, toStringVerbose

Methods inherited from class java.lang.Object

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

Constructor Detail

LongAvgRateStat

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

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

Parameters:

group - the statistics group

definition - the statistics definition

periodMillis - the averaging period in milliseconds

reportTimeUnit - the time unit for reporting the rate

Method Detail

add

public void add(long value,
                long time)

Adds a new value to the average.

Parameters:

value - the new value

time - the current time

getValueType

public Class<Long> getValueType()

Description copied from class: StatWithValueType

Returns the type of the value returned by the BaseStat.get() method.

Specified by:

getValueType in class StatWithValueType<Long>

Returns:

the type of the value returned by get

get

public Long get()

Description copied from class: BaseStat

Returns the value of the statistic.

Specified by:

get in class BaseStat<Long>

Returns:

the value

clear

public void clear()

Description copied from class: BaseStat

Resets the statistic to its initial state.

Specified by:

clear in class BaseStat<Long>

copy

public LongAvgRateStat copy()

Description copied from class: BaseStat

Returns a copy of this statistic.

Overrides:

copy in class Stat<Long>

Returns:

a copy

getFormattedValue

protected String getFormattedValue()

Description copied from class: BaseStat

Returns the value of the statistic as a formatted string.

Specified by:

getFormattedValue in class BaseStat<Long>

Returns:

the value as a formatted string

isNotSet

public boolean isNotSet()

Description copied from class: BaseStat

Returns whether the statistic is in its initial state.

Specified by:

isNotSet in class BaseStat<Long>

Returns:

if the statistic is in its initial state

set

public void set(Long newValue)

Description copied from class: Stat

Set the stat value.

Specified by:

set in class Stat<Long>

Throws:

UnsupportedOperationException - always

add

public void add(Stat<Long> other)

Description copied from class: Stat

Add the value of "other" to this stat.

Specified by:

add in class Stat<Long>

Throws:

UnsupportedOperationException - always

computeInterval

public LongAvgRateStat computeInterval(Stat<Long> base)

Create a stat that includes the newest entries from this stat and the base stat. This method does not use negative intervals, since negation does not work properly for this non-additive stat. The base argument must be a LongAvgRateStat.

Specified by:

computeInterval in class Stat<Long>

negate

public void negate()

Do nothing for this non-additive stat.

Specified by:

negate in class Stat<Long>