ASF GitHub Bot logged work on BEAM-7819:

                Author: ASF GitHub Bot
            Created on: 08/Aug/19 19:12
            Start Date: 08/Aug/19 19:12
    Worklog Time Spent: 10m 
      Work Description: matt-darwin commented on issue #9232: [BEAM-7819] 
Python - parse PubSub message_id into attributes property
URL: https://github.com/apache/beam/pull/9232#issuecomment-519650640
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Issue Time Tracking

    Worklog Id:     (was: 291511)
    Time Spent: 3h 10m  (was: 3h)

> PubsubMessage message parsing is lacking non-attribute fields
> -------------------------------------------------------------
>                 Key: BEAM-7819
>                 URL: https://issues.apache.org/jira/browse/BEAM-7819
>             Project: Beam
>          Issue Type: Bug
>          Components: io-py-gcp
>            Reporter: Ahmet Altay
>            Assignee: Udi Meiri
>            Priority: Major
>          Time Spent: 3h 10m
>  Remaining Estimate: 0h
> User reported issue: 
> https://lists.apache.org/thread.html/139b0c15abc6471a2e2202d76d915c645a529a23ecc32cd9cfecd315@%3Cuser.beam.apache.org%3E
> """
> Looking at the source code, with my untrained python eyes, I think if the 
> intention is to include the message id and the publish time in the attributes 
> attribute of the PubSubMessage type, then the protobuf mapping is missing 
> something:-
> @staticmethod
> def _from_proto_str(proto_msg):
> """Construct from serialized form of ``PubsubMessage``.
> Args:
> proto_msg: String containing a serialized protobuf of type
> https://cloud.google.com/pubsub/docs/reference/rpc/google.pubsub.v1#google.pubsub.v1.PubsubMessage
> Returns:
> A new PubsubMessage object.
> """
> msg = pubsub.types.pubsub_pb2.PubsubMessage()
> msg.ParseFromString(proto_msg)
> # Convert ScalarMapContainer to dict.
> attributes = dict((key, msg.attributes[key]) for key in msg.attributes)
> return PubsubMessage(msg.data, attributes)
> The protobuf definition is here:-
> https://cloud.google.com/pubsub/docs/reference/rpc/google.pubsub.v1#google.pubsub.v1.PubsubMessage
> and so it looks as if the message_id and publish_time are not being parsed as 
> they are seperate from the attributes. Perhaps the PubsubMessage class needs 
> expanding to include these as attributes, or they would need adding to the 
> dictionary for attributes. This would only need doing for the _from_proto_str 
> as obviously they would not need to be populated when transmitting a message 
> to PubSub.
> My python is not great, I'm assuming the latter option would need to look 
> something like this?
> attributes = dict((key, msg.attributes[key]) for key in msg.attributes)
> attributes.update({'message_id': msg.message_id, 'publish_time': 
> msg.publish_time})
> return PubsubMessage(msg.data, attributes)
> """

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