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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