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From "gautam (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8928) Make ChaosMonkey & LoadTest tools extensible, to allow addition of more actions and policies.
Date Thu, 11 Jul 2013 09:05:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13705626#comment-13705626

gautam commented on HBASE-8928:

Again I wont change LoadTest tool per se, I will add another tool, you can say LoadTestWithTolerance
extending this tool. The only change I will be doing is to make the properties protected to
be usable by my tool.
> Make ChaosMonkey & LoadTest tools extensible, to allow addition of more actions and
> ---------------------------------------------------------------------------------------------
>                 Key: HBASE-8928
>                 URL: https://issues.apache.org/jira/browse/HBASE-8928
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.95.2
>            Reporter: gautam
>            Assignee: Enis Soztutar
> Let me split this requirement into 2 parts:
> i) ChaosMonkey
> I was trying to add more tests around new actions and policies by leveraging the existing
classes nested inside ChaosMonkey.
> But it turned out that some of the classes cannot be used outside, unless we make those
visible to the world.
> Here is an example:
> I cannot extend ChaosMonkey.Action, as the init(ActionContext context) method has package-wide
> There are other places as well which makes it impossible for anyone to extend on top
of this hierarchy.
> ii) LoadTestTool
> I wanted to extend this tool to define failure/pass criteria based on % of read/write
failed, rather than comparing against absolute 0. 
> For that this beautiful class should mark some of its properties usable by its child,
by marking those protected.
> I wanted to get unblocked here first. 
> Once this gets fixed, I think I can take up a JIRA item to refactor these tools, if required.

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