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From "Bryan Duxbury (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2611) [hbase] Create a RowMutation class in the public API
Date Tue, 15 Jan 2008 17:39:35 GMT
[hbase] Create a RowMutation class in the public API
----------------------------------------------------

                 Key: HADOOP-2611
                 URL: https://issues.apache.org/jira/browse/HADOOP-2611
             Project: Hadoop
          Issue Type: New Feature
          Components: contrib/hbase
            Reporter: Bryan Duxbury
            Priority: Minor


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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