[GitHub] [pulsar] tpiperatgod commented on pull request #18929: [improve][fn] Support processingGuarantees "EFFECTIVELY_ONCE" in python function

["tpiperatgod (via GitHub)" <gi...@apache.org>]

tpiperatgod commented on PR #18929:
URL: https://github.com/apache/pulsar/pull/18929#issuecomment-1427713593

   > @tpiperatgod Could you explain how these changes together ensure the `effectively_once` processing guarantee?
   
   Sorry for not finishing it before. It is currently available for review.
   
   this PR does the following
   1. maintain a `message id - producer obj` map during runtime
   2. when a message comes in, generate the `producer_name`, `producer_id` and the `sequence_id` based on the message information
   3. use `producer_id` to check if the corresponding producer obj exists: if it exists, set `self.producer` to that producer obj; otherwise, create a new producer obj using `producer_name`
   4. assign the `sequence_id` when sending the message
   
   


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