[ http://issues.apache.org/jira/browse/HADOOP-59?page=comments#action_12425315 ] Doug Cutting commented on HADOOP-59: ------------------------------------
Owen, what you say makes good sense. If you feel strongly about it, please submit a new bug. > support generic command-line options > ------------------------------------ > > Key: HADOOP-59 > URL: http://issues.apache.org/jira/browse/HADOOP-59 > Project: Hadoop > Issue Type: Improvement > Components: conf > Affects Versions: 0.2.0 > Reporter: Doug Cutting > Assigned To: Hairong Kuang > Priority: Minor > Fix For: 0.4.0 > > Attachments: bashfile.patch, commons-cli-2.0-SNAPSHOT.jar, > genericCommand.patch, Tool.java, ToolBase.java, toolbase.patch > > > Hadoop commands should all support some common options. For example, it > should be possible to specify the namenode, datanode, and, for that matter, > any config option, in a generic way. > This could be implemented with code like: > public interface Tool extends Configurable { > void run(String[] args) throws Exception; > } > public class ToolBase implements Tool extends Configured { > public final void main(String[] args) throws Exception { > Configuration conf = new Configuration(); > ... parse config options from args into conf ... > this.configure(conf); > this.run(); > } > } > public MyTool extends ExcecutableBase { > public static void main(String[] args) throws Exception { > new MyTool().main(args); > } > } > The general command line syntax could be: > bin/hadoop [generalOptions] command [commandOptions] > Where generalOptions are things that ToolBase handles, and only the > commandOptions are passed to Tool.run(). The most important generalOption > would be '-D', which would define name/value pairs that are set in the > configuration. This alone would permit folks to set the namenode, datanode, > etc. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
