org.apache.beam.sdk.runners

Class AggregatorValues<T>

java.lang.Object

org.apache.beam.sdk.runners.AggregatorValues<T>

Type Parameters:

T - the output type of the aggregator

public abstract class AggregatorValues<T>
extends Object

A collection of values associated with an Aggregator. Aggregators declared in a DoFn are emitted on a per-DoFn-application basis.

Constructor Summary

Constructors

Constructor and Description
AggregatorValues()

Method Summary

Modifier and Type	Method and Description
T	getTotalValue(Combine.CombineFn<T,?,T> combineFn) Get the total value of this Aggregator by applying the specified Combine.CombineFn.
Collection<T>	getValues() Get the values of the Aggregator at all steps it was used.
abstract Map<String,T>	getValuesAtSteps() Get the values of the Aggregator by the user name at each step it was used.

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregatorValues

public AggregatorValues()

Method Detail

getValues

public Collection<T> getValues()

Get the values of the Aggregator at all steps it was used.

getValuesAtSteps

public abstract Map<String,T> getValuesAtSteps()

Get the values of the Aggregator by the user name at each step it was used.

getTotalValue

public T getTotalValue(Combine.CombineFn<T,?,T> combineFn)

Get the total value of this Aggregator by applying the specified Combine.CombineFn.