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From "Adrian Woodhead (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2268) JobControl classes should use interfaces rather than implemenations
Date Thu, 29 Nov 2007 13:01:05 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrian Woodhead updated HADOOP-2268:
------------------------------------

    Summary: JobControl classes should use interfaces rather than implemenations  (was: Job.java
should expose jobs as Lists rather than ArrayLists)

> JobControl classes should use interfaces rather than implemenations
> -------------------------------------------------------------------
>
>                 Key: HADOOP-2268
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2268
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.15.0
>            Reporter: Adrian Woodhead
>            Assignee: Adrian Woodhead
>            Priority: Minor
>             Fix For: 0.16.0
>
>         Attachments: HADOOP-2268-1.patch, HADOOP-2268-2.patch
>
>
> See HADOOP-2202 for background on this issue. Arun C. Murthy agrees that when possible
it is preferable to program against the interface rather than a concrete implementation (more
flexible, allows for changes of the implementation in future etc.) JobControl currently exposes
running, waiting, ready, successful and dependent jobs as ArrayList rather than List. I propose
to change this to List.
> I will code up a patch for this.

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