[GitHub] [pulsar] codelipenghui opened a new pull request #4079: PIP-34 Key_Shared subscription core implementation.

[GitBox <gi...@apache.org>]

codelipenghui opened a new pull request #4079: PIP-34 Key_Shared subscription core implementation.
URL: https://github.com/apache/pulsar/pull/4079
 
 
   ### Motivation
   
   This is a core implementation for  [PIP-34](https://github.com/apache/pulsar/wiki/PIP-34%3A-Add-new-subscribe-type-Key_Failover) and there is a task tracker [ISSUE-4077](https://github.com/apache/pulsar/issues/4077)  for this PIP
   
   ### Modifications
   
   - Add a new subscription type named Key_Shared
   - Add PersistentStickyKeyDispatcherMultipleConsumers to handle the message dispatch
   - Add a simple hash range based consumer selector
   
   ### Verifying this change
   
   Add new unit tests to verifying the hash range selector and Key_Shared mode message consume.
   
   ### Does this pull request potentially affect one of the following parts:
   
   *If `yes` was chosen, please highlight the changes*
   
     - Dependencies (does it add or upgrade a dependency): (yes / no)
     - The public API: (yes)
     - The schema: (no)
     - The default values of configurations: (no)
     - The wire protocol: (yes)
     - The rest endpoints: (no)
     - The admin cli options: (no)
     - Anything that affects deployment: (no)
   
   ### Documentation
   
     - Does this pull request introduce a new feature? (yes)
     - If yes, how is the feature documented? (not documented)
     - If a feature is not documented yet in this PR, please create a followup issue for adding the documentation
   
   [ISSUE-4077](https://github.com/apache/pulsar/issues/4077) will track the task of documentation for this PR.
   

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