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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6438) Add configuration getters/setters to serialization classes
Date Mon, 14 Dec 2009 19:15:19 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790299#action_12790299
] 

Aaron Kimball commented on HADOOP-6438:
---------------------------------------

In MAPREDUCE-1126 you suggested that we add these methods directly to WritableSerialization
and AvroSerialization. We could move them into the MR project proper, though I don't know
that {{o.a.h.m.lib.input}} makes much sense as a destination -- these methods are configuring
the intermediate data types, not the input types.

For future-proofing purposes: I anticipate that for MAPREDUCE-815, we'll also need to add
related methods to set the serialization metadata maps for the final output key and value
types. (a la {{JobConf.setOutputKeyClass()}}). It would be nice if the output type configuration
and the intermediate type configuration remained "close together" (e.g., in the same package).

Should we add a new package that contains a configuration API around serializers? e.g.  {{o.a.h.m.lib.serialization}}
or  {{o.a.h.m.lib.types}}

> Add configuration getters/setters to serialization classes
> ----------------------------------------------------------
>
>                 Key: HADOOP-6438
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6438
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: HADOOP-6438.patch
>
>
> Needed for MAPREDUCE-1126, getter and setter methods to inject specific metadata into
configurations to (de)serialize various data types.

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