codelipenghui opened a new pull request #5457: [transaction-coordinator] Ownership change listeners URL: https://github.com/apache/pulsar/pull/5457 ### Motivation This is the first part to implement transaction coordinator startup, this PR added ownership change listeners, using the ownership change listeners can get namespace bundle/topics is owned or unload by this broker. transaction coordinator can add listeners to create transaction coordinator instance, also some other component can use it to get the change event of ownership. ### Modifications Add namespace bundle ownership listener Add topic ownership listener ### Verifying this change Added new unit tests ### 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): (no) - The public API: (no) - The schema: (no) - The default values of configurations: (no) - The wire protocol: (no) - The rest endpoints: (no) - The admin cli options: (no) - Anything that affects deployment: (no) ### Documentation - Does this pull request introduce a new feature? (no)
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