org.apache.hadoop.hdfs.tools

Class DFSHAAdmin

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.ha.HAAdmin

org.apache.hadoop.hdfs.tools.DFSHAAdmin

All Implemented Interfaces:

Configurable, Tool

public class DFSHAAdmin
extends HAAdmin

Class to extend HAAdmin to do a little bit of HDFS-specific configuration.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.ha.HAAdmin

HAAdmin.UsageInfo

Field Summary

Fields inherited from class org.apache.hadoop.ha.HAAdmin

errOut, out, USAGE

Constructor Summary

Constructors

Constructor and Description
DFSHAAdmin()

Method Summary

Modifier and Type	Method and Description
static Configuration	addSecurityConfiguration(Configuration conf) Add the requisite security principal settings to the given Configuration, returning a copy.
protected Collection<String>	getTargetIds(String namenodeToActivate) returns the list of all namenode ids for the given configuration
protected String	getUsageString()
static void	main(String[] argv)
protected HAServiceTarget	resolveTarget(String nnId) Try to map the given namenode ID to its service address.
protected int	runCmd(String[] argv)
void	setConf(Configuration conf)
protected void	setErrOut(PrintStream errOut)
protected void	setOut(PrintStream out)

Methods inherited from class org.apache.hadoop.ha.HAAdmin

getServiceAddr, printUsage, run

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

getConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf

Constructor Detail

DFSHAAdmin

public DFSHAAdmin()

Method Detail

setErrOut

protected void setErrOut(PrintStream errOut)

setOut

protected void setOut(PrintStream out)

setConf

public void setConf(Configuration conf)

Specified by:

setConf in interface Configurable

Overrides:

setConf in class HAAdmin

addSecurityConfiguration

public static Configuration addSecurityConfiguration(Configuration conf)

Add the requisite security principal settings to the given Configuration, returning a copy.

Parameters:

conf - the original config

Returns:

a copy with the security settings added

resolveTarget

protected HAServiceTarget resolveTarget(String nnId)

Try to map the given namenode ID to its service address.

Specified by:

resolveTarget in class HAAdmin

getUsageString

protected String getUsageString()

Overrides:

getUsageString in class HAAdmin

runCmd

protected int runCmd(String[] argv)
              throws Exception

Overrides:

runCmd in class HAAdmin

Throws:

Exception

getTargetIds

protected Collection<String> getTargetIds(String namenodeToActivate)

returns the list of all namenode ids for the given configuration

Overrides:

getTargetIds in class HAAdmin

main

public static void main(String[] argv)
                 throws Exception

Throws:

Exception