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https://issues.apache.org/jira/browse/HBASE-19007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204381#comment-16204381
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stack commented on HBASE-19007:
-------------------------------
Chatted w/ [~appy]. We came up w/ this proposal:
* Undo exposing RegionServerServices and MasterServices to coprocessors.
* Only expose Server to Coprocessors so they can do getServerName,
getConfiguration, etc. (The amended HBASE-12260 Server, the one that has a few
extra methods and the IA.LP annotation added).
* Amend MasterCoprocessorEnvironment and RegionServerCoprocessorEnvironment
adding to these classes any methods/facility we want to expose to Coprocessors.
For example, we'd have the MasterCorprocessorEnvironment implement
ServerListener so a CP could register itself on the Master-side to listen to
the coming and going of Servers or we'd add to MasterCPE the isActiveMaster
method. CPs would do env#isActiveMaster() instead of
env#getMasterServices().isActiveMaster().
Benefits:
* MS and RSS can return to their original intent as pure Interfaces useful in
test and giving Managers and Services a subset of total Master function (though
they are overburdened still and in need of cleanup).
* What we provide CPs is untangled from Server and its subclasses and moved to
the proper location, the 'environment' we supply CPs when they run.
Downsides:?
[~anoop.hbase] You good w/ this? I can work on a patch for Master-side to show
what it would look like.
> Align Services Interfaces in Master and RegionServer
> ----------------------------------------------------
>
> Key: HBASE-19007
> URL: https://issues.apache.org/jira/browse/HBASE-19007
> Project: HBase
> Issue Type: Task
> Reporter: stack
> Priority: Blocker
>
> HBASE-18183 adds a CoprocessorRegionServerService to give a view on
> RegionServiceServices that is safe to expose to Coprocessors.
> On the Master-side, MasterServices becomes an Interface for exposing to
> Coprocessors.
> We need to align the two.
> For background, see
> https://issues.apache.org/jira/browse/HBASE-12260?focusedCommentId=16203820&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16203820
>
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