yittg opened a new pull request #15501:
URL: https://github.com/apache/flink/pull/15501
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## What is the purpose of the change
Initially, we started a separate connection for each ConfigMap watching.
This change introduces Fabric8FlinkKubeConfigMapWatcher, which we can
use as a shared watcher for all ConfigMap watching. This change keeps
the original interface in FlinkKubeClient.
Internally, the Fabric8FlinkKubeConfigMapWatcher is implemented based on
the SharedIndexInformer. Fabric8FlinkKubeConfigMapWatcher only accepts
the occurence of events, and then retrieves the correspoding object from
the SharedIndexInformer. In this way to ensure that the events for one
single ConfigMap watching are sequential. At the same time, it is
guaranteed to be consistent with the semantics of the interface before.
## Brief change log
Using a shared watcher for all ConfigMap watching.
## Verifying this change
This change added tests and can be verified as follows:
- Added test that validates that Fabric8FlinkKubeConfigMapWatcher is
worked as expected.
## 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: (no)
- 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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