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From "Kay Kay (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2324) Refactoring of TableRecordReader (mapred / mapreduce) for reuse outside the scope of InputSplit / RecordReader
Date Sun, 14 Mar 2010 08:01:27 GMT
Refactoring of TableRecordReader (mapred / mapreduce) for reuse outside the scope of InputSplit
/ RecordReader 
---------------------------------------------------------------------------------------------------------------

                 Key: HBASE-2324
                 URL: https://issues.apache.org/jira/browse/HBASE-2324
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: Kay Kay
         Attachments: HBASE-2324.patch

For the storing of tf-idf in hbase ( lucene-hbase project) we need to scan the keys across
the table and retrieve columnar values.  Quite an amount of logic can be reused from TableRecordReader
for the purpose. 

- Refactored TableRecordReader ( from being a protected inner class to a public class outside
) 
- Created an impl class , that does the actual work, without the dependency on hadop.mapreduce.*
packages ( RecordReader) while retaining the implementation that can be reused across libraries.



Do the same thing for .mapred. and .mapreduce. packages. 

Let me know the thoughts on the same. 

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