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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2021/03/01 09:33:45 UTC

[GitHub] [pulsar] pointearth opened a new issue #9765: Record topics acrossed in __peroperties__

pointearth opened a new issue #9765:
URL: https://github.com/apache/pulsar/issues/9765


   **Is your enhancement request related to a problem? Please describe.**
   When a message is processed by multiple functions, there is a key "__pfn_input_topic__ " in the "__properties__" attribute of the message, but this message is only recorded the last topic name. If I don't want the last one, I need a middle one, how could I do?
   
   **Describe the solution you'd like**
   use the key "__pfn_input_topic__ " to record all topics in the process chain, splite by commas. for example:
   __pfn_input_topic__ ="presistent://tenanta/anamespace/topic1,presistent://tenanta/anamespace/topic2,presistent://tenanta/anamespace/topic3"
   
   more often, we can add an attribute to the pulsar function, it identifies whether or not to add the last topic to the key-value "__pfn_input_topic__ ".
   
   **Describe alternatives you've considered**
   Actually, we can change the mechanism of the "__properties__", it can be a list. It must have some limit rules, such as the max element of a Value, and the largest size of a value, it should be 2 attributes of the class message.
   
   
   @codelipenghui @sijie


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[GitHub] [pulsar] nlu90 commented on issue #9765: Record topics acrossed in __peroperties__

Posted by GitBox <gi...@apache.org>.
nlu90 commented on issue #9765:
URL: https://github.com/apache/pulsar/issues/9765#issuecomment-788531566


   Could you elaborate a real world use case for this change?


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[GitHub] [pulsar] codelipenghui commented on issue #9765: Record topics acrossed in __peroperties__

Posted by GitBox <gi...@apache.org>.
codelipenghui commented on issue #9765:
URL: https://github.com/apache/pulsar/issues/9765#issuecomment-1058892799


   The issue had no activity for 30 days, mark with Stale label.


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