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From "Harsh J (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-350) Generalize the SequenceFileInputFilter to apply to any InputFormat
Date Mon, 16 Jan 2012 09:45:41 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harsh J resolved MAPREDUCE-350.
-------------------------------

    Resolution: Invalid

With PathFilter available for use in API today, I don't see value in adding this.

Closing out for now, feel free to reopen if this still is required. Better as a new discussion
since this one has gone stale.
                
> Generalize the SequenceFileInputFilter to apply to any InputFormat
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-350
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-350
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Enis Soztutar
>         Attachments: filtering_v2.patch, filtering_v3.patch, filterinputformat_v1.patch
>
>
> I'd like to generalize the SequenceFileInputFormat that was introduced in HADOOP-412
so that it can be applied to any InputFormat. To do this, I propose:
> interface WritableFilter {
>    boolean accept(Writable item);
> }
> class FilterInputFormat implements InputFormat {
>   ...
> }
> FilterInputFormat would look in the JobConf for:
>    mapred.input.filter.source = the underlying input format
>    mapred.input.filter.filters = a list of class names that implement WritableFilter
> The FilterInputFormat will work like the current SequenceFilter, but use an internal
RecordReader rather than the SequenceFile. This will require adding a next(key) and getCurrentValue(value)
to the RecordReader interface, but that will be addressed in a different issue.

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