TsReaper opened a new pull request #13625:
URL: https://github.com/apache/flink/pull/13625
## What is the purpose of the change
Deadlock breakup algorithm and Multi-input operator creation algorithm need
information about the input edges of an exec node, for example what's the
priority of this input, and how the input records will trigger the output
records.
Although `BatchExecNode` currently has a `getDamBehavior` method, it only
describes the behavior of the node and is not very useful for the new deadlock
breakup algorithm. So we're going to introduce a new class `ExecEdge` to
describe this and a new method `getInputEdges` for `ExecNode`.
Current implementation of `getInputEdges` for `ExecNode`s is a collection
and rewrite of current code (mostly from the `getDamBehavior`) without any test
coverage. `getInputEdges` will be called when we introduce the new deadlock
breakup and multi-input operator creation algorithm and will be tested along
with the algorithm.
## Brief change log
- Introduce `ExecEdge`
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## 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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