cgl.narada.performance
Class StatCollection

java.lang.Object
  cgl.narada.performance.StatCollection

public class StatCollection
extends Object

Field Summary

static byte	AVG_STAT
static byte	JITTER_STAT
static byte	MAX_STAT
static byte	MIN_STAT
static byte	TIME_AVG_STAT Average value over time of collection.

Constructor Summary

StatCollection()

Method Summary

void	addMetricValue(String metric, double value) -----------------------------------------------------------------
double	getLastSample(String metric) ----------------------------------------------------------------------
Enumeration	getMetrics() -----------------------------------------------------------------
double	getMetricStat(String metric, int numSamples, byte type) -----------------------------------------------------------------
double	getMetricStat(String metric, long startPeriod, long endPeriod, byte type) ----------------------------------------------------------------- byte MIN_STAT, MAX_STAT, AVG_STAT,
Vector	getSamples(String metric, int samples) -----------------------------------------------------------------
static void	main(String[] args) =====================================================================
void	setMaxSamples(int maxSamples) ----------------------------------------------------------------- Maximum number of samples to store for each metric.

Methods inherited from class java.lang.Object

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

Field Detail

AVG_STAT

public static final byte AVG_STAT

See Also:

Constant Field Values

MAX_STAT

public static final byte MAX_STAT

See Also:

Constant Field Values

MIN_STAT

public static final byte MIN_STAT

See Also:

Constant Field Values

JITTER_STAT

public static final byte JITTER_STAT

See Also:

Constant Field Values

TIME_AVG_STAT

public static final byte TIME_AVG_STAT

Average value over time of collection. X / second.

See Also:

Constant Field Values

Constructor Detail

StatCollection

public StatCollection()

Method Detail

setMaxSamples

public void setMaxSamples(int maxSamples)

----------------------------------------------------------------- Maximum number of samples to store for each metric. Only necessary summaries are kept for calculating MAX/MIN/STDEV and average for those beyond the latest samples.

addMetricValue

public void addMetricValue(String metric,
                           double value)

-----------------------------------------------------------------

getMetrics

public Enumeration getMetrics()

-----------------------------------------------------------------

Returns:

The list of metric names.

getSamples

public Vector getSamples(String metric,
                         int samples)

-----------------------------------------------------------------

getMetricStat

public double getMetricStat(String metric,
                            int numSamples,
                            byte type)
                     throws IllegalArgumentException

-----------------------------------------------------------------

Parameters:

metric - The metric name.

numSamples - calculate over these # of latest samples

type - The type of metric.

Returns:

the value specified by type calculated over the last numSamples.

Throws:

IllegalArgumentException - invalid metric type or numSamples beyond the amount of data available.

getMetricStat

public double getMetricStat(String metric,
                            long startPeriod,
                            long endPeriod,
                            byte type)
                     throws IllegalArgumentException

----------------------------------------------------------------- byte MIN_STAT, MAX_STAT, AVG_STAT,

Throws:

IllegalArgumentException, - invalid type or metric name.

IllegalArgumentException

getLastSample

public double getLastSample(String metric)

----------------------------------------------------------------------

Throws:

IllegalArgumentException - the metric is not found.

main

public static void main(String[] args)

=====================================================================