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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1425) Rework the various programs in 'examples' to extend ToolBase
Date Thu, 24 May 2007 18:11:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12498751
] 

Raghu Angadi commented on HADOOP-1425:
--------------------------------------

bq. How did you create 'conf'?
just like we create conf anywhere, {{new Configuration();}}, for e.g.. ToolBase does not create
conf.

Actual use case in DFSAdmin.java:

{code}
  /**
   * main() has some simple utility methods.
   * @param argv Command line parameters.
   * @exception Exception if the filesystem does not exist.
   */
  public static void main(String[] argv) throws Exception {
    int res = new DFSAdmin().doMain(new Configuration(), argv);
    System.exit(res);
  }
{code}

Note that ToolBase forces the subclass to call {{doMain()}} and implement {{run()}}.




> 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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