reswqa opened a new pull request, #24422:
URL: https://github.com/apache/flink/pull/24422
## What is the purpose of the change
*This is the first PR for DataStream V2, and aim to implement FLIP-409:
DataStream V2 Building Blocks: DataStream, Partitioning and ProcessFunction *
## Brief change log
- *Introduce four type of `streams` in FLIP-409.*
- *Introduce `ProcessFunction` and all it's variants. *
- *Introduce new `ExecutionEnvironment` to submit job written in the new
API.*
- *Supports FLIP-27 based `Source` and `Sink-v2`*
## Verifying this change
This change added new tests.
## 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, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? yes
- Documentation needs to be added in subsequent PR.
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