AggregatorValues (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 AggregatorValues<T>

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

    All Methods Instance Methods Abstract Methods Concrete Methods 

    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.