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Posted to common-dev@hadoop.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2006/03/24 23:07:22 UTC
[jira] Created: (HADOOP-103) introduce a common parent class for
Mapper and Reducer
introduce a common parent class for Mapper and Reducer
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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
Assigned to: Owen O'Malley
Priority: Minor
Fix For: 0.1
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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[jira] Updated: (HADOOP-103) introduce a common parent class for
Mapper and Reducer
Posted by "Owen O'Malley (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HADOOP-103?page=all ]
Owen O'Malley updated HADOOP-103:
---------------------------------
Attachment: user-task-2.patch
Here is a new patch that renames the base class to MapReduceBase.
> 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-2.patch, 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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[jira] Updated: (HADOOP-103) introduce a common parent class for
Mapper and Reducer
Posted by "Owen O'Malley (JIRA)" <ji...@apache.org>.
[ 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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[jira] Resolved: (HADOOP-103) introduce a common parent class for
Mapper and Reducer
Posted by "Doug Cutting (JIRA)" <ji...@apache.org>.
[ http://issues.apache.org/jira/browse/HADOOP-103?page=all ]
Doug Cutting resolved HADOOP-103:
---------------------------------
Resolution: Fixed
I just committed this. Thanks, Owen!
> 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-2.patch, 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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