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https://issues.apache.org/jira/browse/HBASE-18298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179597#comment-16179597
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stack commented on HBASE-18298:
-------------------------------

What do I look at? RB is different to v5 here? I'm going w/ v5 because it looks 
much better (smile).

Woah. CoprocessorRegionServerServices is way cut down. It looks good.

The below cast is hackery for now because this class is deprecated and going 
away [~anoop.hbase]?

rsServices = (RegionServerServices) 
this.env.getCoprocessorRegionServerServices();

If so, that makes sense.

The below creates a new zk instance?

176           ZooKeeper zk = new ZooKeeper(ensemble, sessionTimeout, null);
177           re.getSharedData().putIfAbsent(zkkey, new ZKWatcher(zk));

It gets closed? You think we don't have to reuse because this an example?


nit: s/getFromOnlineRegions/getOnlineRegion/ singular.

This is good    public interface OnlineRegions extends ImmutableOnlineRegions {

What you think here: 

HRegionServer rs = (HRegionServer) env.getCoprocessorRegionServerServices();

No way around it? 

And later, should we allow getting reference to zk? Though AccessController 
should be coming internal so wouldn't worry about it....

I think this is ok... because it test:

assert regionEnv.getCoprocessorRegionServerServices() instanceof 
RegionServerServices;
66            RpcServerInterface server = ((RegionServerServices) regionEnv
67                .getCoprocessorRegionServerServices()).getRpcServer();

I think this patch looks great now. +1.





> RegionServerServices Interface cleanup for CP expose
> ----------------------------------------------------
>
>                 Key: HBASE-18298
>                 URL: https://issues.apache.org/jira/browse/HBASE-18298
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>            Priority: Critical
>             Fix For: 2.0.0-alpha-4
>
>         Attachments: HBASE-18298.patch, HBASE-18298_V2.patch, 
> HBASE-18298_V3.patch, HBASE-18298_V4.patch, HBASE-18298_V5.patch
>
>




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