[jira] [Resolved] (HBASE-8928) Make ChaosMonkey & LoadTest tools extensible, to allow addition of more actions and policies.

["Jesse Yates (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-8928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesse Yates resolved HBASE-8928.
--------------------------------

    Resolution: Fixed
    
> Make ChaosMonkey & LoadTest tools extensible, to allow addition of more actions and policies.
> ---------------------------------------------------------------------------------------------
>
>                 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: gautam
>             Fix For: 0.98.0, 0.95.2, 0.94.10
>
>         Attachments: HBASE-8928-0.94.patch, HBASE-8928-trunk.patch
>
>
> 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 visibility.
> 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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