[jira] [Commented] (HELIX-709) Prepare controller stages for async execution

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HELIX-709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16537428#comment-16537428 ] 

ASF GitHub Bot commented on HELIX-709:
--------------------------------------

GitHub user zhan849 opened a pull request:

    https://github.com/apache/helix/pull/214

    [HELIX-709] Move external view calculation to async stage and re-organize pipeline

    - Separated controller pipeline to execute external view compute async and as early as possible
    - renamed AbstractAsyncBaseStage
    - fixed NPE in callback handler
    - all tests passed

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/zhan849/helix harry/async-ev

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/helix/pull/214.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 #214
    
----
commit 542fbc840a167986a40bd57f3c5660d294acb63c
Author: Harry Zhang <hr...@...>
Date:   2018-07-09T19:16:56Z

    [HELIX-709] Move external view calculation to async stage and re-organize pipeline

----


> Prepare controller stages for async execution
> ---------------------------------------------
>
>                 Key: HELIX-709
>                 URL: https://issues.apache.org/jira/browse/HELIX-709
>             Project: Apache Helix
>          Issue Type: Task
>            Reporter: Hao Zhang
>            Priority: Major
>
> There are a couple of stages in helix controller that can be executed asynchronously, but each execution should be done in order. Currently for helix controller, we have a thread pool for un-ordered execution, but we also need one for ordered execution.
> In this ticket should do the following:
> 1. Create a pool of configurable workers using DedupEventProcessor
> 2. Create AbstractAsyncBaseStage for those stages that can be executed asynchronously to share common code
> AC:
> Create AbstractAsyncBaseStage and DedupFIFOWorkerPool for async execution, pass all tests.



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