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Posted to common-issues@hadoop.apache.org by "Jeff Zhang (JIRA)" <ji...@apache.org> on 2010/07/19 11:19:50 UTC
[jira] Commented: (HADOOP-6866) Tool interface should also support
getUsage()
[ https://issues.apache.org/jira/browse/HADOOP-6866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889792#action_12889792 ]
Jeff Zhang commented on HADOOP-6866:
------------------------------------
This is a good point, but I concern that it will bring in incompatibility problem. It will force the users who use the old Tool interface to add the getUsage() method.
> Tool interface should also support getUsage()
> ---------------------------------------------
>
> Key: HADOOP-6866
> URL: https://issues.apache.org/jira/browse/HADOOP-6866
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Amar Kamat
>
> Currently each and every _tool_ implementing the {{Tool}} interface is forced to manage their usage string. Since its a common piece of code, its better we factor it out. This can be useful in the following ways
> # A proper lib like support for usage strings
> # Forcing _tools_ (implementers of {{Tool}}) to expose their usage string
> # Test cases can now use these well defined and exposed usage strings to test
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