XComp opened a new pull request, #22640:
URL: https://github.com/apache/flink/pull/22640
## What is the purpose of the change
Makes `DefaultLeaderElectionService` implement
`MultipleComponentLeaderElectionDriver.Listener` besides the
`LeaderElectionEventHandler` interface.
## Brief change log
* Makes `DefaultLeaderElectionService` implement
`MultipleComponentLeaderElectionDriver.Listener`
* Modifies `MultipleComponentLeaderElectionDriver.Listener` in a way that
`isLeader` requires the session ID to be passed in instead of generating it
internally. This aligns more with how `LeaderElectionEventHandler` was
implemented. It also makes more sense because the HA backend should be the
owner of the session ID: Theoretically, it could provide such a session ID.
## Verifying this change
* The test code is adapted in a way that it only uses the
`MultipleComponentLeaderElectionDriver.Listener` methods.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: no
- The runtime per-record code paths (performance sensitive): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: yes
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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