sjwiesman opened a new pull request #13797:
URL: https://github.com/apache/flink/pull/13797
## What is the purpose of the change
This adds the new `CheckpointStorage` interface as described in FLIP-142 and
wires it through the runtime. Public API changes will be added in a follow-up
PR. This is based on #13794 and the first commit can be skipped.
## Brief changelog
6ab8c8d Adds the new `CheckpointStorage` interface, factory, and loader.
61a8ec6 Wires the `CheckpointStorage` object through the StreamGraph,
ExecutionGraph, StreamTask, and CheckpointCoordinator
c06b3dc Removes the checkpoint-storage related methods from `StateBackend`
and adds `CheckpointStorage` as an interface to the existing state backend
implementations. This commit then makes misc fixes to tests so everything
passes.
## Verifying this change
UT tests and also existing E2E tests
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (**yes** / no)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (**yes** / no /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (**yes** / no)
- If yes, how is the feature documented? (not applicable / docs /
**JavaDocs** / not documented)
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