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https://issues.apache.org/jira/browse/HBASE-19550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16302642#comment-16302642
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Chia-Ping Tsai commented on HBASE-19550:
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Thanks for you reviews. [~tedyu]

bq. The implementation is similar to PrivateCellUtil#getTag(). Is it possible 
to refactor the code ?
I followed the logic from other ExtendedCell impls. We should move the impl to 
ExtenedCell to be a default method. That was the Q I raised to [~ram_krish]. We 
can file another jira for the refactor after ram gives the input.

Other comments will be addressed in next patch.

> Wrap the Mutation in cp layer to make sure all passed cells are of 
> ExtendedCell
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-19550
>                 URL: https://issues.apache.org/jira/browse/HBASE-19550
>             Project: HBase
>          Issue Type: Task
>            Reporter: Chia-Ping Tsai
>            Assignee: Chia-Ping Tsai
>             Fix For: 2.0.0-beta-2
>
>         Attachments: HBASE-19550.v0.patch
>
>
> We assume all cells in server are of ExtendedCell. However, cp user can add 
> their cell impl via Put#add(Cell) in observer. That will cause 
> UnsupportedOperationException when rs try to update the cell's timestamp and 
> seq Id. We should do something for cp user...For example, wrap the passed 
> cells to be a extendcell type.



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