org.apache.beam.sdk.runners

Class AggregatorPipelineExtractor

java.lang.Object

org.apache.beam.sdk.runners.AggregatorPipelineExtractor

public class AggregatorPipelineExtractor
extends Object

Retrieves Aggregators at each ParDo and returns a Map of Aggregator to the PTransforms in which it is present.

Constructor Summary

Constructors

Constructor and Description
AggregatorPipelineExtractor(Pipeline pipeline) Creates an AggregatorPipelineExtractor for the given Pipeline.

Method Summary

Modifier and Type	Method and Description
Map<Aggregator<?,?>,Collection<PTransform<?,?>>>	getAggregatorSteps() Returns a Map between each Aggregator in the Pipeline to the PTransforms in which it is used.

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregatorPipelineExtractor

public AggregatorPipelineExtractor(Pipeline pipeline)

Creates an AggregatorPipelineExtractor for the given Pipeline.

Method Detail

getAggregatorSteps

public Map<Aggregator<?,?>,Collection<PTransform<?,?>>> getAggregatorSteps()

Returns a Map between each Aggregator in the Pipeline to the PTransforms in which it is used.