Package com.ocient.metrics

Class PerfCounter

java.lang.Object

com.ocient.metrics.Metric<Number>

com.ocient.metrics.PerfCounter

All Implemented Interfaces:

Supplier<Number>

public abstract class PerfCounter
extends Metric<Number>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PerfCounter.ThreadingModel	Threading model under which the counter will be mutated

Nested classes/interfaces inherited from class com.ocient.metrics.Metric

Metric.CounterType, Metric.DataType, Metric.MetricPath, Metric.NamedTag, Metric.Tag, Metric.Units

Method Summary

Modifier and Type	Method	Description
Metric.CounterType	counterType()
void	decValue(long delta)	Subtracts delta from the internal value of this counter.
static PerfCounter	dummy()	Returns a counter that no-ops
abstract void	incValue(long delta)	Adds delta to the internal value of this counter.
static PerfCounter	longCounter(Metric.MetricPath path, PerfCounter.ThreadingModel threadingModel, Metric.DataType dataType, Metric.CounterType counterType, Metric.Units units)	Creates a new PerfCounter instance for a long value.
abstract void	setValue(long value)	Sets the raw internal value of this counter.

Methods inherited from class com.ocient.metrics.Metric

dataType, path, units

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Supplier

get

Method Details

longCounter

public static PerfCounter longCounter(Metric.MetricPath path, PerfCounter.ThreadingModel threadingModel, Metric.DataType dataType, Metric.CounterType counterType, Metric.Units units)

Creates a new PerfCounter instance for a long value.

Parameters:

path - the perf counter path

threadingModel - the desired Producer-consumer model

dataType - the data type of this perf counter

counterType - the counter type of this perf counter

units - the units of this perf counter

Returns:

a new perf counter

dummy

public static PerfCounter dummy()

Returns a counter that no-ops

counterType

public final Metric.CounterType counterType()

Specified by:

counterType in class Metric<Number>

Returns:

this perf counter's data Metric.CounterType

setValue

public abstract void setValue(long value)

Sets the raw internal value of this counter.

Parameters:

value - the new value of the counter

incValue

public abstract void incValue(long delta)

Adds delta to the internal value of this counter.

Parameters:

delta - the amount to add

decValue

public void decValue(long delta)

Subtracts delta from the internal value of this counter.

Parameters:

delta - the amount to subtract