AggregatorPipelineExtractor (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

Warning: Dataflow SDK 1.x for Java is unsupported as of October 16, 2018. See Migrating from Dataflow SDK 1.x for Java for migration guidance.

Note: If you are using Cloud Dataflow SDK version 2.x, see the Apache Beam API reference documentation.

com.google.cloud.dataflow.sdk.runners

Class AggregatorPipelineExtractor

• java.lang.Object
• • com.google.cloud.dataflow.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

    All Methods Instance Methods Concrete Methods 

    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.