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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2648) API Rework: Have Delete and Put implement same Interface or subclass same 'Mutation' ancestor (Get too? And Result?)
Date Tue, 01 Jun 2010 23:11:35 GMT
API Rework: Have Delete and Put implement same Interface or subclass same 'Mutation' ancestor
(Get too?  And Result?)
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                 Key: HBASE-2648
                 URL: https://issues.apache.org/jira/browse/HBASE-2648
             Project: HBase
          Issue Type: Improvement
            Reporter: stack


Our API has a problem in that we can't pass a mix of Put and Delete edits.  We see it in various
places.

HBASE-1626 tried to add being able to emit Puts and Deletes from your Map or Reduce but as
HBASE-1969 points out, it won't work as done.

Ryan talks about need of being able to pass a set of Deletes and Puts against a single row
so we can do a bunch of edits all under the umbrella of a single row *lock*.

Related, HBASE-1845 wants to do bulk put/gets/deletes all in same way and HBASE-2609 is related
in that it asks that the Delete and Put API work the same.

For at least the first issue, in hbase-1969, "HBASE-1626 does not work as advertised due to
lack of "instanceof" check in MR framework", Lars G suggests we have a Mutation class that
can carry Deletes and Puts on a row.  He notes that the sample client code in the BT table
seems to do this.  This Mutation carrying-class could be used to solve the Ryan issue above.

But maybe we need something more radical, an API overhaul (again) to do something like was
proposed long-time ago in hbase-880.  This was an ugly, unfinished proposal but many of the
classes shared an ancestor -> https://issues.apache.org/jira/secure/attachment/12395138/880proposal5-v2.png.


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