becketqin opened a new pull request #14303:
URL: https://github.com/apache/flink/pull/14303
## What is the purpose of the change
The current KafkaRecordDesrializer has the following problems:
1. The existing `DesrializationSchema` and legacy
`KafkaDeserializationSchema` implementations cannot be reused.
2. Missing an `open()` method with context for serialization and
deserialization.
This patch fixes the above issues by doing the following:
* Add a `getUserCodeClassLoader()` method to `SourceReaderContext` so the
`SourceReader` implementation can construct the
`SerializationDeserializationContext`.
* Add the bridge method to facilitate reuse of the DeserializationSchema and
legacy `KafkaDeserializationSchema`.
* Rename `KafkaRecordDeserializer` to `KafkaRecordDeserializationSchema` to
follow the naming convention.
## Brief change log
* Add a `getUserCodeClassLoader()` method to `SourceReaderContext` so the
`SourceReader` implementation can construct the
`SerializationDeserializationContext`.
* Add the bridge method to facilitate reuse of the DeserializationSchema and
legacy `KafkaDeserializationSchema`.
## Verifying this change
Unit tests have been added to `KafkaRecordDeserializationSchemaTest` to
verify the change in `KafkaRecordDeserializationSchema`
## 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)`: (**yes**)
- The serializers: (**yes**)
- 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? (Java doc)
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