[jira] [Created] (BEAM-10039) Create a mechanism to run a custom worker intialization code on Python workers

["Valentyn Tymofieiev (Jira)" <ji...@apache.org>]

Valentyn Tymofieiev created BEAM-10039:
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             Summary: Create a mechanism to run a custom worker intialization code on Python workers 
                 Key: BEAM-10039
                 URL: https://issues.apache.org/jira/browse/BEAM-10039
             Project: Beam
          Issue Type: New Feature
          Components: sdk-py-core
            Reporter: Valentyn Tymofieiev


A couple of Beam users mentioned a usecase where some  initialization code needs to run on Python workers before pipeline processing starts.

Such code needs to be executed run early in the main() method of python worker[1].

Java SDK has provides this capability  via JvmInitializer [2], BEAM-6872. Let's add such capability for Python users as well.

[1] https://github.com/apache/beam/blob/7ad4c4c8e601e39573aae7b4d778be2e908a0868/sdks/python/apache_beam/runners/worker/sdk_worker_main.py#L85
[2] https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/harness/JvmInitializer.java



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