org.apache.jackrabbit.stats

Class TimeSeriesRecorder

java.lang.Object

org.apache.jackrabbit.stats.TimeSeriesRecorder

All Implemented Interfaces:

TimeSeries

public class TimeSeriesRecorder
extends Object
implements TimeSeries

Recorder of a time series. An instance of this class records (and clears) the state of a given AtomicLong counter once every second and exposes the collected time series through the TimeSeries interface.

Constructor Summary

Constructors

Constructor and Description
TimeSeriesRecorder(boolean resetValueEachSecond) Same as TimeSeriesRecorder(boolean, long) passing long for the 2nd argument
TimeSeriesRecorder(boolean resetValueEachSecond, long missingValue)
TimeSeriesRecorder(RepositoryStatistics.Type type)

Method Summary

Modifier and Type	Method and Description
AtomicLong	getCounter() Returns the AtomicLong instance used to measure the value for the time series.
long	getMissingValue() The value used to encode missing values i.e.
long[]	getValuePerHour() Returns the measured value per hour over the last week.
long[]	getValuePerMinute() Returns the measured value per minute over the last hour.
long[]	getValuePerSecond() Returns the measured value per second over the last minute.
long[]	getValuePerWeek() Returns the measured value per week over the last three years.
void	recordOneSecond() Records the number of measured values over the past second and resets the counter.

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeSeriesRecorder

public TimeSeriesRecorder(RepositoryStatistics.Type type)

TimeSeriesRecorder

public TimeSeriesRecorder(boolean resetValueEachSecond)

Same as TimeSeriesRecorder(boolean, long) passing long for the 2nd argument

Parameters:

resetValueEachSecond - Whether to reset value each second

TimeSeriesRecorder

public TimeSeriesRecorder(boolean resetValueEachSecond,
                          long missingValue)

Parameters:

resetValueEachSecond - Whether to reset value each second

missingValue - The value used to encode missing values

Method Detail

getCounter

public AtomicLong getCounter()

Returns the AtomicLong instance used to measure the value for the time series.

Returns:

value

recordOneSecond

public void recordOneSecond()

Records the number of measured values over the past second and resets the counter. This method should be scheduled to be called once per second.

getMissingValue

public long getMissingValue()

Description copied from interface: TimeSeries

The value used to encode missing values i.e. for a period where no value was recorded.

Specified by:

getMissingValue in interface TimeSeries

Returns:

default value

getValuePerSecond

public long[] getValuePerSecond()

Description copied from interface: TimeSeries

Returns the measured value per second over the last minute.

Specified by:

getValuePerSecond in interface TimeSeries

Returns:

measured value per second, in chronological order

getValuePerMinute

public long[] getValuePerMinute()

Description copied from interface: TimeSeries

Returns the measured value per minute over the last hour.

Specified by:

getValuePerMinute in interface TimeSeries

Returns:

measured value per minute, in chronological order

getValuePerHour

public long[] getValuePerHour()

Description copied from interface: TimeSeries

Returns the measured value per hour over the last week.

Specified by:

getValuePerHour in interface TimeSeries

Returns:

measured value per hour, in chronological order

getValuePerWeek

public long[] getValuePerWeek()

Description copied from interface: TimeSeries

Returns the measured value per week over the last three years.

Specified by:

getValuePerWeek in interface TimeSeries

Returns:

measured value per week, in chronological order