com.sleepycat.je.utilint

Class Stat<T>

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

ActiveTxnArrayStat, BooleanStat, FloatStat, IntegralLongAvgStat, LongArrayStat, MapStat, StatWithValueType, StringStat

public abstract class Stat<T>
extends BaseStat<T>
implements Cloneable

Base class for all JE statistics. A single Stat embodies a value and definition. See StatGroup for a description of how to create and display statistics. Note that Stat intentionally does not contain the statistics value itself. Instead, the concrete subclass will implement the value as the appropriate primitive type. That's done to avoid wrapper classes like Integer and Long, and to keep the overhead of statistics low.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected StatDefinition	definition

Method Summary

Modifier and Type	Method and Description
abstract void	add(Stat<T> other) Add the value of "other" to this stat.
abstract Stat<T>	computeInterval(Stat<T> base) Compute interval value with respect to the base value.
Stat<T>	copy() Returns a copy of this statistic.
Stat<T>	copyAndAdd(StatGroup group) Return a copy of this statistic and add to group.
Stat<T>	copyAndClear() Return a copy of this stat, and clear the stat's value.
StatDefinition	getDefinition()
abstract void	negate() Negate the value.
abstract void	set(T newValue) Set the stat value.
String	toString()
String	toStringVerbose() Includes the per-stat description in the output string.

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

clear, get, getFormattedValue, isNotSet

Methods inherited from class java.lang.Object

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

Field Detail

definition

protected final StatDefinition definition

Method Detail

set

public abstract void set(T newValue)

Set the stat value.

add

public abstract void add(Stat<T> other)

Add the value of "other" to this stat.

computeInterval

public abstract Stat<T> computeInterval(Stat<T> base)

Compute interval value with respect to the base value.

negate

public abstract void negate()

Negate the value.

copy

public Stat<T> copy()

Description copied from class: BaseStat

Returns a copy of this statistic.

Specified by:

copy in class BaseStat<T>

Returns:

a copy

copyAndAdd

public Stat<T> copyAndAdd(StatGroup group)

Return a copy of this statistic and add to group.

copyAndClear

public Stat<T> copyAndClear()

Return a copy of this stat, and clear the stat's value.

getDefinition

public StatDefinition getDefinition()

toString

public String toString()

Overrides:

toString in class Object

toStringVerbose

public String toStringVerbose()

Includes the per-stat description in the output string.