io.neba.core.resourcemodels.metadata

Class ResourceModelStatistics

java.lang.Object

io.neba.core.resourcemodels.metadata.ResourceModelStatistics

public class ResourceModelStatistics
extends Object

Represents statistical data regarding the usage of a ResourceModel. This implementation is intentionally not thread-safe, i.e. the calculations will loose accuracy in case the statics are modified concurrently. This is intended: We can give up some precision in favor of a massive performance gain, as this model is accessed hundreds of times per request, e.g. during page rendering.
However, it is expected that the statistics still provide an accurate picture and gain precision as time passes and data accumulates.

Author:

Olaf Otto

Constructor Summary

Constructors

Constructor and Description
ResourceModelStatistics()

Method Summary

Methods

Modifier and Type	Method and Description
ResourceModelStatistics	countInstantiation() Increments the number of times the resource model was instantiated.
ResourceModelStatistics	countMappingDuration(int durationInMs) Adds the mapping with the duration to the statistics.
ResourceModelStatistics	countMappings(int mappings) Adds the mappings to the statistics.
double	getAverageMappingDuration()
long	getInstantiations()
int[]	getMappingDurationFrequencies()
int[]	getMappingDurationIntervalBoundaries()
double	getMappingDurationMedian()
double	getMaximumMappingDuration()
double	getMinimumMappingDuration()
long	getNumberOfMappings()
long	getSince()
double	getTotalMappingDuration()
void	reset() Clears all collected statistical data.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceModelStatistics

public ResourceModelStatistics()

Method Detail

reset

public void reset()

Clears all collected statistical data.

getSince

public long getSince()

Returns:

The age of these statistics in terms of System.currentTimeMillis().

getInstantiations

public long getInstantiations()

Returns:

The number of times this resource model instantiated.

countInstantiation

public ResourceModelStatistics countInstantiation()

Increments the number of times the resource model was instantiated.

Returns:

this instance.

countMappings

public ResourceModelStatistics countMappings(int mappings)

Adds the mappings to the statistics.

Returns:

this instance.

getNumberOfMappings

public long getNumberOfMappings()

Returns:

the total number of recorded subsequent resource-to-resourcemodel mappings that occurred during the mapping of this model.

countMappingDuration

public ResourceModelStatistics countMappingDuration(int durationInMs)

Adds the mapping with the duration to the statistics.

Returns:

this instance.

getAverageMappingDuration

public double getAverageMappingDuration()

Returns:

the average mapping duration of all counted mappings in ms.

getTotalMappingDuration

public double getTotalMappingDuration()

Returns:

the sum of all recorded mapping durations in ms, i.e. summed up averages of the mapping duration frequency table interval means.

getMappingDurationMedian

public double getMappingDurationMedian()

Returns:

the median of the mapping durations based on a frequency table.

getMaximumMappingDuration

public double getMaximumMappingDuration()

Returns:

The maximum recorded mapping duration of this resource model in ms.

getMinimumMappingDuration

public double getMinimumMappingDuration()

Returns:

The minimum recorded mapping duration of this resource model in ms.

getMappingDurationFrequencies

public int[] getMappingDurationFrequencies()

getMappingDurationIntervalBoundaries

public int[] getMappingDurationIntervalBoundaries()