org.apache.solr.analytics.function.reduction.data

Class CountCollector

java.lang.Object

org.apache.solr.analytics.function.reduction.data.ReductionDataCollector<CountCollector.CountData>

org.apache.solr.analytics.function.reduction.data.CountCollector

Direct Known Subclasses:

CountCollector.ExpressionCountCollector, CountCollector.TotalCountCollector

public abstract class CountCollector
extends ReductionDataCollector<CountCollector.CountData>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CountCollector.CountData
static class	CountCollector.ExpressionCountCollector Represents a count(expr) expression.
static class	CountCollector.TotalCountCollector Represents a count() expression.

Field Summary

Fields

Modifier and Type	Field and Description
static String	name

Fields inherited from class org.apache.solr.analytics.function.reduction.data.ReductionDataCollector

collectionTargets, ioData, lastingTargets

Constructor Summary

Constructors

Constructor and Description
CountCollector(String exprStr)

Method Summary

Modifier and Type	Method and Description
long	count() The number of Solr Documents for which the given analytics expression exists.
long	docCount() The number of Solr Documents used in this reduction.
String	getExpressionStr() The unique expression string of the reduction data collector, given all inputs and parameters.
String	getName() Get the name of the reduction data collector.
CountCollector.CountData	newData() A clean slate to start a new reduction.
void	setData(ReductionData data) Finalize the reduction with the collected data stored in the parameter.
void	setMergedData(ReductionData data) Finalize the reduction with the merged data stored in the parameter.
void	submitReservations(Consumer<ReductionDataReservation<?,?>> consumer) Submits the data reservations needed for this data collector.

Methods inherited from class org.apache.solr.analytics.function.reduction.data.ReductionDataCollector

addCollectTarget, addLastingCollectTarget, apply, clearLastingCollectTargets, collect, collectAndApply, dataIO, newDataIO, newDataTarget

Methods inherited from class java.lang.Object

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

Field Detail

name

public static final String name

See Also:

Constant Field Values

Constructor Detail

CountCollector

public CountCollector(String exprStr)

Method Detail

count

public long count()

The number of Solr Documents for which the given analytics expression exists.

Returns:

the count

docCount

public long docCount()

The number of Solr Documents used in this reduction.

Returns:

the number of documents

newData

public CountCollector.CountData newData()

Description copied from class: ReductionDataCollector

A clean slate to start a new reduction.

Specified by:

newData in class ReductionDataCollector<CountCollector.CountData>

Returns:

the new reduction data

submitReservations

public void submitReservations(Consumer<ReductionDataReservation<?,?>> consumer)

Description copied from class: ReductionDataCollector

Submits the data reservations needed for this data collector.

Specified by:

submitReservations in class ReductionDataCollector<CountCollector.CountData>

Parameters:

consumer - the consumer which the reservations are submitted to

setMergedData

public void setMergedData(ReductionData data)

Description copied from class: ReductionDataCollector

Finalize the reduction with the merged data stored in the parameter. Once the reduction is finalized, the ReductionFunctions that use this data collector act like regular AnalyticsValue classes that can be accessed through their get<value-type> methods. (FOR CLOUD)

Specified by:

setMergedData in class ReductionDataCollector<CountCollector.CountData>

Parameters:

data - the merged data to compute a reduction for

setData

public void setData(ReductionData data)

Description copied from class: ReductionDataCollector

Finalize the reduction with the collected data stored in the parameter. Once the reduction is finalized, the ReductionFunctions that use this data collector act like regular AnalyticsValue classes that can be accessed through their get<value-type> methods. (FOR SINGLE-SHARD)

Specified by:

setData in class ReductionDataCollector<CountCollector.CountData>

Parameters:

data - the collected data to compute a reduction for

getName

public String getName()

Description copied from class: ReductionDataCollector

Get the name of the reduction data collector. This is the same across all instances of the data collector.

Specified by:

getName in class ReductionDataCollector<CountCollector.CountData>

Returns:

the name

getExpressionStr

public String getExpressionStr()

Description copied from class: ReductionDataCollector

The unique expression string of the reduction data collector, given all inputs and parameters. Used during ReductionDataCollector syncing. Since the string should be unique, only one of expression is kept.

Specified by:

getExpressionStr in class ReductionDataCollector<CountCollector.CountData>

Returns:

the expression string