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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6856) SequenceFile and MapFile need cleanup to remove redundant constructors
Date Fri, 09 Jul 2010 16:05:50 GMT
SequenceFile and MapFile need cleanup to remove redundant constructors

                 Key: HADOOP-6856
                 URL: https://issues.apache.org/jira/browse/HADOOP-6856
             Project: Hadoop Common
          Issue Type: Improvement
          Components: io
            Reporter: Owen O'Malley
            Assignee: Owen O'Malley
             Fix For: 0.22.0

Currently there are 2 public SequenceFile.Reader constructors, 3 public SequenceFile.Writer
constructors, 9 public SequenceFile.createWriter, 2 public MapFile.Reader constructors, and
8 public MapFile.Writer constructors. All of with various historical combinations of parameters
that don't cover the entire space.

All of this makes it *very* difficult to add new optional parameters to SequenceFile and MapFile.

I'd like change to the style of FileContext.create with option parameters. I'll implement
one public SequenceFile.Reader constructor and one public SequenceFile.createWriter and implement
all of the current variants based on those two. I'll do the same for MapFile.Reader and MapFile.Writer
including passing parameters down to the underlying SequenceFile.

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