KeeProMise opened a new pull request, #6871:
URL: https://github.com/apache/hadoop/pull/6871
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### Description of PR
please see: https://issues.apache.org/jira/browse/HDFS-17545
NOTE: This is a sub-pull request (PR) related to
[HDFS-17531](https://issues.apache.org/jira/browse/HDFS-17531)(Asynchronous
router RPC). For more details or context, please refer to the main issue
[HDFS-17531](https://issues.apache.org/jira/browse/HDFS-17531)
More detailed documentation:
[HDFS-17531](https://issues.apache.org/jira/browse/HDFS-17531) Router
asynchronous rpc implementation.pdf and Aynchronous router.pdf
**Main modifications:**
- RouterRpcClient.java: The original functionality remains unchanged; common
methods have been extracted from the original methods.
- RouterAsyncRpcClient.java: An asynchronous implementation of
RouterRpcClient, inheriting from RouterRpcClient.
- Added configuration for asynchronous feature toggle, as well as the number
of asynchronous handlers and responders.
- Using ThreadLocalContext to maintain thread local variables, ensuring that
thread local variables can be correctly passed between handler,
asyncRouterHandler, and asyncRouterResponder.
### How was this patch tested?
new UT TestRouterAsyncRpcClient
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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