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Posted to commits@beam.apache.org by "Udi Meiri (JIRA)" <ji...@apache.org> on 2018/05/11 16:20:00 UTC

[jira] [Created] (BEAM-4275) Pubsub: add DirectRunner support for id_label and timestamp_attribute in Python SDK

Udi Meiri created BEAM-4275:
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             Summary: Pubsub: add DirectRunner support for id_label and timestamp_attribute in Python SDK
                 Key: BEAM-4275
                 URL: https://issues.apache.org/jira/browse/BEAM-4275
             Project: Beam
          Issue Type: Bug
          Components: runner-direct, sdk-py-core
            Reporter: Udi Meiri
            Assignee: Thomas Groh


At least for publishing (and maybe pulling) messages, non-Dataflow-based sources and sinks for Pub/Sub use the [public API|https://cloud.google.com/pubsub/docs/publisher] for Pub/Sub, which doesn't support id_label and timestamp_attribute settings.

Publishing:
 id_label - add an attribute to each message with a unique value
 timestamp_attribute - add an attribute to each message with the publishing time as its value

Pulling:
 id_label - use the value of this message attribute to deduplicate messages
 timestamp_attribute - use the value of this message attribute as the element's timestamp

 

Implementation details: could probably create a pubsubio.py module, for reuse with other runners (i.e. implement Pub/Sub IO as PTransforms and not NativeSinks and Sources).



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