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https://issues.apache.org/jira/browse/HADOOP-1425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12498732
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Doug Cutting commented on HADOOP-1425:
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ToolBase does more than parse arguments. It also builds a Configuration.
Subclasses can use getConf() to access the configuration and must implement
run(String[]), which is passed the non-generic parameters from the command
line. How would you achieve this without subclassing ToolBase and without
replicating logic from ToolBase? Also, why is it a burden to subclass ToolBase?
> Rework the various programs in 'examples' to extend ToolBase
> -------------------------------------------------------------
>
> Key: HADOOP-1425
> URL: https://issues.apache.org/jira/browse/HADOOP-1425
> Project: Hadoop
> Issue Type: Improvement
> Components: examples
> Reporter: Arun C Murthy
> Assigned To: Enis Soztutar
> Priority: Minor
> Fix For: 0.14.0
>
>
> Ensuring all 'examples' extend ToolBase will make it easy to tweak various
> config params (via -D switches for e.g.) while running the programs...
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