Package org.epics.archiverappliance.retrieval.postprocessors

Class PopulationVariance

java.lang.Object

org.epics.archiverappliance.retrieval.postprocessors.SummaryStatsPostProcessor

org.epics.archiverappliance.retrieval.postprocessors.PopulationVariance

All Implemented Interfaces:

FillNoFillSupport, PostProcessor, PostProcessorWithConsolidatedEventStream

public class PopulationVariance
extends SummaryStatsPostProcessor
implements PostProcessor

Implements the SummaryStatistics.getPopulationVariance

Author:

mshankar

Field Summary

Fields inherited from class org.epics.archiverappliance.retrieval.postprocessors.SummaryStatsPostProcessor

consolidatedData

Constructor Summary

Constructors

Constructor	Description
PopulationVariance()

Method Summary

Modifier and Type	Method	Description
SummaryStatsCollector	getCollector()
String	getIdentity()	The string used by clients to identify this post processor when making retrieval requests.

Methods inherited from class org.epics.archiverappliance.retrieval.postprocessors.SummaryStatsPostProcessor

doNotInheritValuesFromPrevioisBins, estimateMemoryConsumption, getBinTimestamps, getBinTimestamps, getConsolidatedEventStream, getElementCount, getEndBinEpochSeconds, getExtension, getStartBinEpochSeconds, initialize, isProvidingVectorData, wrap, zeroOutEmptyBins

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.epics.archiverappliance.retrieval.postprocessors.PostProcessor

estimateMemoryConsumption, getExtension, initialize, wrap

Constructor Details

PopulationVariance

public PopulationVariance()

Method Details

getIdentity

public String getIdentity()

Description copied from interface: PostProcessor

The string used by clients to identify this post processor when making retrieval requests. For example to identify the FirstSamplePP postprocessor, users would add a pp=firstSample to the request for data. The situation is a little more complex; if a post processor has parameters then it needs to combine these into a string and offer that as an extension. The identity is just the starting part of this.

1. For example, pp=firstSample_600 asks the server to sparsify with an interval of 600 seconds.
2. identity is firstSample.
3. extension is firstSample_600.
4. User specifies firstSample_600.
5. ETL caches the data as firstSample_600 if asked to.

Specified by:

getIdentity in interface PostProcessor

Specified by:

getIdentity in class SummaryStatsPostProcessor

Returns:

identify  

getCollector

public SummaryStatsCollector getCollector()

Specified by:

getCollector in class SummaryStatsPostProcessor