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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-103) introduce a common parent class for Mapper and Reducer
Date Wed, 29 Mar 2006 00:30:20 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-103?page=all ]

Owen O'Malley updated HADOOP-103:

    Attachment: user-task.patch

This patch introduces a UserTask base class that will implement the trivial configure and
close methods needed for Mapper and Reducer classes. It also modifies all of the examples
and built-in map and reduce classes to use the new base class. (Note that this new base class
is completely optional, user code does not need to change, but it removes a lot of null function
bodies that would otherwise be needed.)

> introduce a common parent class for Mapper and Reducer
> ------------------------------------------------------
>          Key: HADOOP-103
>          URL: http://issues.apache.org/jira/browse/HADOOP-103
>      Project: Hadoop
>         Type: Improvement
>   Components: mapred
>     Versions: 0.1
>     Reporter: Owen O'Malley
>     Assignee: Owen O'Malley
>     Priority: Minor
>      Fix For: 0.1
>  Attachments: user-task.patch
> I'd like to a base class that implements the default (empty) bodies for configure and
close so that Mapper and Reducer classes that derive from it, which is optional, don't have
to implement those methods.

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