com.sleepycat.je.utilint

Class MapStat<T,C extends MapStatComponent<T,C>>

java.lang.Object

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

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

com.sleepycat.je.utilint.MapStat<T,C>

Type Parameters:

T - the value type of the individual statistics

C - the class of the individual statistics

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

AtomicLongMapStat, LatencyPercentileMapStat, LongAvgMapStat, LongAvgRateMapStat, LongDiffMapStat, LongMaxMapStat

public abstract class MapStat<T,C extends MapStatComponent<T,C>>
extends Stat<String>

A base class for JE stats that map String keys to component statistics, and that return results as formatted strings.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<String,C>	statMap Maps keys to individual statistics.

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

definition

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MapStat(MapStat<T,C> other) Creates an instance of this class as a copy of another instance.
protected	MapStat(StatGroup group, StatDefinition definition) Creates an instance of this class.

Method Summary

Modifier and Type	Method and Description
void	add(Stat<String> other) Add the value of "other" to this stat.
void	clear() Resets the statistic to its initial state.
Stat<String>	copyAndClear() This implementation adds synchronization.
String	get() Returns the map as a string in the format returned by getFormattedValue(), but with values presented without using commas.
protected String	getFormattedValue() This implementation returns the keys and values of the individual statistics in the format: KEY=VALUE[;KEY=VALUE].
SortedMap<String,T>	getMap() Returns a map from keys to values of individual statistics, ignoring individual statistics that are not set.
boolean	isNotSet() Returns whether the statistic is in its initial state.
void	removeStat(String key) Removes the individual statistic associated with the specified key.
void	set(String value) Set the stat value.

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

computeInterval, copy, copyAndAdd, getDefinition, negate, toString, toStringVerbose

Methods inherited from class java.lang.Object

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

Field Detail

statMap

protected final Map<String,C extends MapStatComponent<T,C>> statMap

Maps keys to individual statistics. Synchronize on the MapStat instance when accessing this field.

Constructor Detail

MapStat

protected MapStat(StatGroup group,
                  StatDefinition definition)

Creates an instance of this class.

Parameters:

group - the owning group

definition - the associated definition

MapStat

protected MapStat(MapStat<T,C> other)

Creates an instance of this class as a copy of another instance. This instance should be a new instance to avoid lock ordering concerns.

Parameters:

other - the instance to copy

Method Detail

removeStat

public void removeStat(String key)

Removes the individual statistic associated with the specified key.

Parameters:

key - the key

getMap

public SortedMap<String,T> getMap()

Returns a map from keys to values of individual statistics, ignoring individual statistics that are not set.

Returns:

map from keys to values of individual statistics

get

public String get()

Returns the map as a string in the format returned by getFormattedValue(), but with values presented without using commas.

Specified by:

get in class BaseStat<String>

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<String>

getFormattedValue

protected String getFormattedValue()

This implementation returns the keys and values of the individual statistics in the format: KEY=VALUE[;KEY=VALUE].

Specified by:

getFormattedValue in class BaseStat<String>

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<String>

Returns:

if the statistic is in its initial state

set

public void set(String value)

Description copied from class: Stat

Set the stat value.

Specified by:

set in class Stat<String>

Throws:

UnsupportedOperationException - always

add

public void add(Stat<String> other)

Description copied from class: Stat

Add the value of "other" to this stat.

Specified by:

add in class Stat<String>

Throws:

UnsupportedOperationException - always

copyAndClear

public Stat<String> copyAndClear()

This implementation adds synchronization.

Overrides:

copyAndClear in class Stat<String>