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Posted to issues@beam.apache.org by "Jan Lukavský (Jira)" <ji...@apache.org> on 2019/11/04 11:37:00 UTC

[jira] [Created] (BEAM-8550) @RequiresTimeSortedInput DoFn annotation

Jan Lukavský created BEAM-8550:
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             Summary: @RequiresTimeSortedInput DoFn annotation
                 Key: BEAM-8550
                 URL: https://issues.apache.org/jira/browse/BEAM-8550
             Project: Beam
          Issue Type: New Feature
          Components: beam-model, sdk-java-core
            Reporter: Jan Lukavský
            Assignee: Jan Lukavský


Implement new annotation {{@RequiresTimeSortedInput}} for stateful DoFn as described in [design document|https://docs.google.com/document/d/1ObLVUFsf1NcG8ZuIZE4aVy2RYKx2FfyMhkZYWPnI9-c/edit?usp=sharing]. First implementation will assume that:

  - time is defined by timestamp in associated WindowedValue

  - allowed lateness is explicitly zero and all late elements are dropped (due to being out of order)

The above properties are considered temporary and will be resolved by subsequent extensions (backwards compatible).



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