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https://issues.apache.org/jira/browse/HADOOP-3261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12591441#action_12591441
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Owen O'Malley commented on HADOOP-3261:
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Rather than making new factories, wouldn't it be better to make
ReflectionUtils.newInstance do all of the work? That way all of the contexts
will get it automatically. Does that make sense?
> Allow Mapper and Reducer classes to be created a Spring Beans
> -------------------------------------------------------------
>
> Key: HADOOP-3261
> URL: https://issues.apache.org/jira/browse/HADOOP-3261
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Environment: All
> Reporter: Dennis Kubes
> Assignee: Dennis Kubes
> Attachments: HADOOP-3261-1-20080415.patch, spring.jar
>
>
> This improvement abstracts the creation of Mappers and Reducers in factory
> classes and adds the ability to define a spring beans.xml file in the
> classpath and have the Mapper and Reducer classes be created as spring beans.
> This is transparent to the rest of Hadoop but the benefit is that is allows
> Mapper and Reducer classes to have their dependencies injected versus having
> them hardcoded. This will help in the ability to test various mapreduce jobs.
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