lvyanquan opened a new pull request, #25331:
URL: https://github.com/apache/flink/pull/25331
## What is the purpose of the change
Remove legacy SourceFunction / SinkFunction / Sink V1 API in 2.0
## Brief change log
1. Mark SourceFunction / SinkFunction implementation as Deprecated.
2. Remove Sink V1 API and relevant usage.
## Verifying this change
All test case that used Sink V1 API had been rewritten with Sink V2 API.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): yes (only test scope)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: yes
- 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, ZooKeeper: no
- The S3 file system connector: no
## Documentation
A document to guide user to update SourceFunction with Source API is needed.
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