Package org.apache.hadoop.hdfs.server.diskbalancer.command

Class HelpCommand

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.hdfs.server.diskbalancer.command.Command

org.apache.hadoop.hdfs.server.diskbalancer.command.HelpCommand

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.conf.Configurable

public class HelpCommand
extends Command

Help Command prints out detailed help about each command.

Constructor Summary

Constructors

Constructor	Description
HelpCommand(org.apache.hadoop.conf.Configuration conf)	Constructs a help command.

Method Summary

Modifier and Type	Method	Description
void	execute(org.apache.commons.cli.CommandLine cmd)	Executes the Client Calls.
void	printHelp()	Gets extended help for this command.

Methods inherited from class org.apache.hadoop.hdfs.server.diskbalancer.command.Command

addValidCommandParameters, close, create, getClusterURI, getDataNodeProxy, getDefaultTop, getNodeList, getNodes, getOutputPath, getTopNodes, open, parseTopNodes, populatePathNames, readClusterInfo, recordOutput, setCluster, setClusterURI, setNodesToProcess, setNodesToProcess, setOutputPath, setTopNodes, verifyCommandOptions

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

HelpCommand

public HelpCommand(org.apache.hadoop.conf.Configuration conf)

Constructs a help command.

Parameters:

conf - - config

Method Details

execute

public void execute(org.apache.commons.cli.CommandLine cmd)
             throws Exception

Executes the Client Calls.

Specified by:

execute in class Command

Parameters:

cmd - - CommandLine

Throws:

Exception

printHelp

public void printHelp()

Gets extended help for this command.

Specified by:

printHelp in class Command