GitHub user lei-xia opened a pull request:
https://github.com/apache/helix/pull/159
Improvements to Helix's Callback handling.
- Improve CallbackHandler by avoiding unnessary re-subscripe to the data
change event.Resubscribe to zk changes only when there is any child chanage,
with async subscription to ensure not missing any new child paths.
- Add new config name for batch callback handing in CallbackHandler.
- Support configurable data prefetch in ZkClient during watch event
callback.
- Add TotalEventCount and TotalHandledEventCount metrics into
ZkClientMonitor Mbean.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lei-xia/helix callback_improvements
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/helix/pull/159.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #159
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commit 49c3da71c63a323005457688cb18ec7ad5f07bba
Author: Lei Xia <lxia@...>
Date: 2018-03-03T00:03:37Z
Add TotalEventCount and TotalHandledEventCount metrics into ZkClientMonitor
Mbean.
commit 6f1c4d8ae20c694e2d9ec7a78731a4ae62c363bd
Author: Lei Xia <lxia@...>
Date: 2018-03-19T17:16:38Z
Support configurable data prefetch in ZkClient during watch event callback.
commit 7c28aaab31413d3b35aeb54ae00a52fa24347490
Author: Lei Xia <lxia@...>
Date: 2018-03-25T02:59:49Z
Add new config name for batch callback handing in CallbackHandler.
commit 77163dba762959c949aa6aa884198036739db9ff
Author: Lei Xia <lxia@...>
Date: 2018-03-19T17:48:49Z
Fix TestZkCallbackHandlerLeak, and refine some log outputs.
commit 5de511ab160c61ff6c9006d5f332b6d92f1c8a55
Author: Lei Xia <lxia@...>
Date: 2018-03-25T03:55:17Z
Improve CallbackHandler by avoiding unnessary re-subscripe to the data
change event.Resubscribe to zk changes only when there is any child chanage,
with async subscription to ensure not missing any new child paths.
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