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https://issues.apache.org/jira/browse/MAPREDUCE-954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756565#action_12756565
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Tom White commented on MAPREDUCE-954:
-------------------------------------
Only marginally relevant to this discussion, but I noticed that the (existing)
Mapper.Context object in MapTask is constructed via reflection. I think it's
possible to create one directly like this:
{code}
Mapper mapper = ...
Mapper.Context mapperContext = mapper.new Context(...);
{code}
Same for Reducer.Context.
> The new interface's Context objects should be interfaces
> --------------------------------------------------------
>
> Key: MAPREDUCE-954
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-954
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client
> Reporter: Owen O'Malley
> Assignee: Arun C Murthy
> Fix For: 0.21.0
>
> Attachments: MAPREDUCE-954.patch, MAPREDUCE-954.patch,
> MAPREDUCE-954.patch
>
>
> When I was doing HADOOP-1230, I was persuaded to make the Context objects as
> classes. I think that was a serious mistake. It caused a lot of information
> leakage into the public classes.
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