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  1. Beam
  2. BEAM-8537

Provide WatermarkEstimatorProvider for different types of WatermarkEstimator

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: P2
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.20.0
    • Component/s: sdk-py-core, sdk-py-harness
    • Labels:
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      Description

      This is a follow up for in-progress PR: https://github.com/apache/beam/pull/9794.
      Current implementation in PR9794 provides a default implementation of WatermarkEstimator. For further work, we want to let WatermarkEstimator to be a pure Interface. We'll provide a WatermarkEstimatorProvider to be able to create a custom WatermarkEstimator per windowed value. It should be similar to how we track restriction for SDF:
      WatermarkEstimator <---> RestrictionTracker
      WatermarkEstimatorProvider <---> RestrictionTrackerProvider
      WatermarkEstimatorParam <---> RestrictionDoFnParam

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            • Assignee:
              boyuanz Boyuan Zhang
              Reporter:
              boyuanz Boyuan Zhang
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