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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-3482) Think to some modification to the API
Date Thu, 11 Aug 2011 18:42:27 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Eli Collins resolved HADOOP-3482.

    Resolution: Won't Fix

Out of date

> Think to some modification to the API
> -------------------------------------
>                 Key: HADOOP-3482
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3482
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Brice Arnould
>            Priority: Minor
> I know that it is out of question to break everything just for minor comfort improvements.
> But I think that we should evaluate the cost of improving the API, and the way we might
do this without too much breaks, before the API freeze of 1.0 . If we start now, it could
be a gradual process that would end only with the 1.0 release.
> I do not particulary focus on those modifications, but here is a samples of what questions
I would like to raise.
> # Text could provide a append(Text other) method
> # Text could implements CharSequence
> # Some Iterators could be turned into IterableIterators.
> # We could consider a more consistent naming (Text could be renamed TextWritable, JobConfigurable.configure()
could be turn in JobConfigurable.setConf() to match Configurable and so on)
> 1. and 2. seems imediatly accessible, even if 1. would benefit of the use of a resizable
container to store bytes.
> 3. requires in theory only the add of a new IterableIteror class inheriting of Iterator.
But making that change visible to the user would require a change in some interface like Mapper
and Reducer.
> 4. *Configurable:* If those Interfaces are only used in the ReflectionUtils, it would
be enough to deprecate JobConfigurable and to consider it as a particular case of Configurable.
Another option would be to deprecate both and to add support in newInstance for passing parameters
to constructors.
> *Text:* Text could be an empty class inheriting of TextWritable, in a package like org.hadoop.compat

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