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https://issues.apache.org/jira/browse/HBASE-19092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16250980#comment-16250980
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stack commented on HBASE-19092:
-------------------------------

Is PrivateCellUtil used in Mutation? Is PCU what CU became?

TagUtil.clone => Tag.clone instead looks good.

Seeing this nice movement of util into Tag class makes me wonder how much we 
could move into Cell.

Why is {@link PrivateCellUtil#MAX_TAGS_LENGTH} define, in PCU and not in Tag?

Is that all the methods we need to extract tags (Looking at ExtendedCell)?

Can you get rid of TagsUtil? Put in PCU?

Can TagType be a subclass of Tag?

I think this approach promising. I think it looks good. Can timeline server do 
all it needs w/ the Tag vocabulary exposed here? Thanks.

> Make Tag IA.LimitedPrivate and expose for CPs
> ---------------------------------------------
>
>                 Key: HBASE-19092
>                 URL: https://issues.apache.org/jira/browse/HBASE-19092
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Critical
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19092-branch-2.patch, 
> HBASE-19092-branch-2_5.patch, HBASE-19092-branch-2_5.patch, 
> HBASE-19092_001-branch-2.patch
>
>
> We need to make tags as LimitedPrivate as some use cases are trying to use 
> tags like timeline server. The same topic was discussed in dev@ and also in 
> HBASE-18995.
> Shall we target this for beta1 - cc [~saint....@gmail.com].
> So once we do this all related Util methods and APIs should also move to 
> LimitedPrivate Util classes.



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