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Date: Wed, 21 Dec 2011 19:37:30 +0000 (UTC)
From: "Mubarak Seyed (Commented) (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-4720) Implement atomic update operations
 (checkAndPut, checkAndDelete) for REST client/server
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    [ https://issues.apache.org/jira/browse/HBASE-4720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174345#comment-13174345 ] 

Mubarak Seyed commented on HBASE-4720:
--------------------------------------

@Ted:
{{eclipse_formatter_apache.xml}} does not work for long lines. Do you mind to post your eclipse formatter rule file? Thanks.
                
> 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.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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