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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-35) [hbase] Make BatchUpdate public in the API
Date Thu, 07 Feb 2008 20:13:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12566770#action_12566770
] 

Jim Kellerman commented on HBASE-35:
------------------------------------

Note for future: please run 'ant package' instead of just 'ant' to build. This will detect
any javadoc errors that may have been introduced.

> [hbase] Make BatchUpdate public in the API
> ------------------------------------------
>
>                 Key: HBASE-35
>                 URL: https://issues.apache.org/jira/browse/HBASE-35
>             Project: Hadoop HBase
>          Issue Type: New Feature
>          Components: client
>            Reporter: Bryan Duxbury
>            Assignee: Bryan Duxbury
>             Fix For: 0.2.0
>
>         Attachments: 35-v2.patch, 35-v3.patch, 35.patch
>
>
> Today, when you want to interact with a row in HBase, you start an update, make changes,
and then commit the lock. This is fine for very simple applications. However, when you try
to do things like support table operations as part of a MapReduce job, it becomes more difficult
to support.
> I propose that we create a new class, RowMutation (a la the Bigtable paper), which encapsulates
a group of actions on a row, and make this available to API consumers. It might look something
like:
> {code}
> RowMutation r = table.getMutation(row_key);
> r.setTimestamp(1111);
> r.put(new Text("colfam1:name", value));
> r.delete(new Text("colfam2:deleted"));
> table.commit(r);
> {code}
> This syntax would supercede the existing startUpdate/commit format, which could be deprecated
and mapped to a RowMutation behind the scenes. 

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