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From "Andrew Purtell (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4720) Implement atomic update operations (checkAndPut, checkAndDelete) for REST client/server
Date Tue, 24 Jan 2012 17:52:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13192309#comment-13192309
] 

Andrew Purtell commented on HBASE-4720:
---------------------------------------

Either the current semantics for REST paths remain the same, that is /table/row/ ..., or every
operation is changed to specify the operation first, e.g. /operation/table/row ... . 
                
> Implement atomic update operations (checkAndPut, checkAndDelete) for REST client/server

> ----------------------------------------------------------------------------------------
>
>                 Key: HBASE-4720
>                 URL: https://issues.apache.org/jira/browse/HBASE-4720
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Daniel Lord
>            Assignee: Mubarak Seyed
>             Fix For: 0.94.0
>
>         Attachments: HBASE-4720.trunk.v1.patch, HBASE-4720.trunk.v2.patch, HBASE-4720.trunk.v3.patch,
HBASE-4720.trunk.v4.patch, HBASE-4720.trunk.v5.patch, HBASE-4720.trunk.v6.patch, HBASE-4720.v1.patch,
HBASE-4720.v3.patch
>
>
> I have several large application/HBase clusters where an application node will occasionally
need to talk to HBase from a different cluster.  In order to help ensure some of my consistency
guarantees I have a sentinel table that is updated atomically as users interact with the system.
 This works quite well for the "regular" hbase client but the REST client does not implement
the checkAndPut and checkAndDelete operations.  This exposes the application to some race
conditions that have to be worked around.  It would be ideal if the same checkAndPut/checkAndDelete
operations could be supported by the REST client.

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