ModelEnforcement (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

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

Interface ModelEnforcement<T>

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  public interface ModelEnforcement<T>

  Enforcement tools that verify that executing code conforms to the model.

  ModelEnforcement is performed on a per-element and per-bundle basis. The ModelEnforcement is provided with the input bundle as part of ModelEnforcementFactory#forBundle(CommittedBundle, AppliedPTransform), each element before and after that element is provided to an underlying TransformEvaluator, and the output InProcessTransformResult and committed output bundles after the TransformEvaluator has completed.

  Typically, ModelEnforcement will obtain required metadata (such as the Coder of the input PCollection on construction, and then enforce per-element behavior (such as the immutability of input elements). When the element is output or the bundle is completed, the required conditions can be enforced across all elements.

• • Method Summary

    All Methods Instance Methods Abstract Methods 

    Modifier and Type	Method and Description
    void	afterElement(com.google.cloud.dataflow.sdk.util.WindowedValue<T> element) Called after a call to TransformEvaluator.processElement(WindowedValue) on the provided WindowedValue.
    void	afterFinish(InProcessPipelineRunner.CommittedBundle<T> input, com.google.cloud.dataflow.sdk.runners.inprocess.InProcessTransformResult result, Iterable<? extends InProcessPipelineRunner.CommittedBundle<?>> outputs) Called after a bundle has been completed and TransformEvaluator.finishBundle() has been called, producing the provided InProcessTransformResult and output bundles.
    void	beforeElement(com.google.cloud.dataflow.sdk.util.WindowedValue<T> element) Called before a call to TransformEvaluator.processElement(WindowedValue) on the provided WindowedValue.

• • Method Detail

    • beforeElement

      void beforeElement(com.google.cloud.dataflow.sdk.util.WindowedValue<T> element)

      Called before a call to TransformEvaluator.processElement(WindowedValue) on the provided WindowedValue.

    • afterElement

      void afterElement(com.google.cloud.dataflow.sdk.util.WindowedValue<T> element)

      Called after a call to TransformEvaluator.processElement(WindowedValue) on the provided WindowedValue.

    • afterFinish

      void afterFinish(InProcessPipelineRunner.CommittedBundle<T> input,
                       com.google.cloud.dataflow.sdk.runners.inprocess.InProcessTransformResult result,
                       Iterable<? extends InProcessPipelineRunner.CommittedBundle<?>> outputs)

      Called after a bundle has been completed and TransformEvaluator.finishBundle() has been called, producing the provided InProcessTransformResult and output bundles.