You are viewing a plain text version of this content. The canonical link for it is here.

Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2008/04/18 19:54:21 UTC

[jira] Commented: (HADOOP-3261) Allow Mapper and Reducer classes to be created a Spring Beans

    [ https://issues.apache.org/jira/browse/HADOOP-3261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590537#action_12590537 ] 

Doug Cutting commented on HADOOP-3261:
--------------------------------------

What applications would benefit from this?

Also, wouldn't we want to implement this for partitioners, inputformats, outputformats, comparators, etc. too?

> 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.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.