PCollectionView (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. After August 12, 2020, you can use unsupported SDKs temporarily while you upgrade your pipelines. For more information, see Using an unsupported SDK.

For information on migrating from the 1.x SDK, see Migrating from Dataflow SDK 1.x for Java.

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

com.google.cloud.dataflow.sdk.values

Interface PCollectionView<T>

• Type Parameters:

  T - the type of the value(s) accessible via this PCollectionView

  All Superinterfaces:

  PInput, POutput, PValue, Serializable

  ---

  
  

  public interface PCollectionView<T>
  extends PValue, Serializable

  A PCollectionView<T> is an immutable view of a PCollection as a value of type T that can be accessed as a side input to a ParDo transform.

  A PCollectionView should always be the output of a PTransform. It is the joint responsibility of this transform and each PipelineRunner to implement the view in a runner-specific manner.

  The most common case is using the View transforms to prepare a PCollection for use as a side input to ParDo. See View.asSingleton(), View.asIterable(), and View.asMap() for more detail on specific views available in the SDK.

• • Method Summary

    All Methods Instance Methods Abstract Methods 

    Modifier and Type	Method and Description
    T	fromIterableInternal(Iterable<com.google.cloud.dataflow.sdk.util.WindowedValue<?>> contents) For internal use only.
    Coder<Iterable<com.google.cloud.dataflow.sdk.util.WindowedValue<?>>>	getCoderInternal() For internal use only.
    TupleTag<Iterable<com.google.cloud.dataflow.sdk.util.WindowedValue<?>>>	getTagInternal() A unique identifier, for internal use.
    com.google.cloud.dataflow.sdk.util.WindowingStrategy<?,?>	getWindowingStrategyInternal() For internal use only.

    • Methods inherited from interface com.google.cloud.dataflow.sdk.values.PValue

      getName, getProducingTransformInternal

    • Methods inherited from interface com.google.cloud.dataflow.sdk.values.POutput

      expand, finishSpecifyingOutput, getPipeline, recordAsOutput

    • Methods inherited from interface com.google.cloud.dataflow.sdk.values.PInput

      expand, finishSpecifying, getPipeline

• • Method Detail

    • getTagInternal

      TupleTag<Iterable<com.google.cloud.dataflow.sdk.util.WindowedValue<?>>> getTagInternal()

      A unique identifier, for internal use.

    • fromIterableInternal

      T fromIterableInternal(Iterable<com.google.cloud.dataflow.sdk.util.WindowedValue<?>> contents)

      For internal use only.

    • getWindowingStrategyInternal

      com.google.cloud.dataflow.sdk.util.WindowingStrategy<?,?> getWindowingStrategyInternal()

      For internal use only.

    • getCoderInternal

      Coder<Iterable<com.google.cloud.dataflow.sdk.util.WindowedValue<?>>> getCoderInternal()

      For internal use only.