LegendPei opened a new pull request, #8217:
URL: https://github.com/apache/incubator-seata/pull/8217
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[changes](https://github.com/apache/incubator-seata/tree/2.x/changes).
### Ⅰ. Describe what this PR did
This PR introduces a pluggable runtime abstraction for Seata FileMode
storage while preserving the existing file-based implementation as the default
provider.
The main changes are:
1. Introduce `FileStoreProvider` and `FileStoreRuntime` abstractions for
FileMode storage.
2. Add `FileStoreProviderFactory` to select the provider through
`store.file.engine`.
3. Move the existing file session and lock implementations behind
`DefaultFileStoreProvider`.
4. Introduce `FileLockStore` and make `FileLockManager` delegate lock
operations to the selected store implementation.
5. Let `SessionHolder` manage the complete FileMode runtime lifecycle:
- open runtime;
- install the lock manager;
- recover sessions;
- start background services;
- roll back partially initialized resources on startup failure;
- close resources in reverse order.
6. Make `LockerManagerFactory` support typed FileMode lock-manager
installation and reject FileMode access before its runtime is ready.
7. Remove eager caching of `LockManager` and coordinator instances from
session, transaction and Console backend components.
8. Keep `store.file.engine=default` as the default configuration so the
original FileMode implementation remains available through the new abstraction.
### Ⅱ. Does this pull request fix one issue?
<!-- If that, add "fixes #xxx" below in the next line, for example, fixes
#97. -->
### Ⅲ. Why don't you add test cases (unit test/integration test)?
### Ⅳ. Describe how to verify it
### Ⅴ. Special notes for reviews
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