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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7093) Couple Increments/Appends with Put/Delete(s)
Date Thu, 15 Nov 2012 18:32:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498205#comment-13498205
] 

Andrew Purtell commented on HBASE-7093:
---------------------------------------

bq. Class IncrementMutation which inherits from Increment and Mutation

I think you will find some method signatures between them incompatible. 
                
> Couple Increments/Appends with Put/Delete(s)
> --------------------------------------------
>
>                 Key: HBASE-7093
>                 URL: https://issues.apache.org/jira/browse/HBASE-7093
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.96.0
>            Reporter: Varun Sharma
>            Assignee: Varun Sharma
>         Attachments: 7093-v1.txt
>
>
> See related issue - https://issues.apache.org/jira/browse/HBASE-4583
> Currently, we cannot bundle increment/append with put/delete operations. The above JIRA
MVCC'izes the increment/append operations.
> One issue is that increment(s)/append(s) are not idempotent and hence repeating the transaction
has an associated issue of leading to incorrect value/append results. This could be solved
by passing additional tokens as part of the append(s).
> One possible high level approach could be:
> 1) Class IncrementMutation which inherits from Increment and Mutation
> 2) In the mutateRow call, we add a case for "IncrementMutation" object
> 3) Factor out the code wrapped inside the "lock and MVCC" from increment() function to
internalIncrement.
> 4) Call internalIncrement from mutateRow and increment()

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