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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12260) MasterServices needs a short-back-and-sides; pare-back exposure of internals and IA.Private classes
Date Fri, 13 Oct 2017 16:53:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16203843#comment-16203843
] 

stack commented on HBASE-12260:
-------------------------------

Hmm. On the thread on the dev list I state the patten I adopt doing this MasterServices refactor
and even ask if we should prefix all CP class with a CP. That part of the email didn't get
any commentary. My guess is that the implications are not commonly understood (and I didn't
do a good enough job explaining).

> MasterServices needs a short-back-and-sides; pare-back exposure of internals and IA.Private
classes
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-12260
>                 URL: https://issues.apache.org/jira/browse/HBASE-12260
>             Project: HBase
>          Issue Type: Sub-task
>          Components: master
>            Reporter: ryan rawson
>            Assignee: stack
>            Priority: Critical
>             Fix For: 2.0.0-alpha-4
>
>         Attachments: HBASE-12260.master.001.patch, HBASE-12260.master.002.patch, HBASE-12260.master.003.patch,
HBASE-12260.master.004.patch, HBASE-12260.master.005.patch, HBASE-12260.master.006.patch,
HBASE-12260.master.007.patch, HBASE-12260.master.008.patch, HBASE-12260.master.009.patch,
HBASE-12260.master.010.patch, HBASE-12260.master.011.patch, HBASE-12260.master.011.patch,
HBASE-12260.master.012.patch, HBASE-12260.master.013.patch, HBASE-12260.master.014.patch
>
>
> A major issue with MasterServices is the MasterCoprocessorEnvironment exposes this class
even though MasterServices is tagged with @InterfaceAudience.Private
> This means that the entire internals of the HMaster is essentially part of the coprocessor
API.  Many of the classes returned by the MasterServices API are highly internal, extremely
powerful, and subject to constant change.  
> Perhaps a new API to replace MasterServices that is use-case focused, and justified based
on real world co-processors would suit things better.



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