Package org.apache.hadoop.tools

Class DistCh

java.lang.Object

org.apache.hadoop.tools.DistCh

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class DistCh
extends java.lang.Object

A Map-reduce program to recursively change files properties such as owner, group and permission.

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.hadoop.mapred.JobConf	jobconf
protected static org.slf4j.Logger	LOG

Method Summary

Modifier and Type	Method	Description
protected static void	checkSource(org.apache.hadoop.conf.Configuration conf, java.util.List<org.apache.hadoop.fs.Path> srcs)	Sanity check for source
org.apache.hadoop.mapred.JobConf	getConf()
protected static java.lang.String	getRandomId()
static void	main(java.lang.String[] args)
protected static java.util.List<java.lang.String>	readFile(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path inputfile)
protected static java.lang.String	readString(java.io.DataInput in)
int	run(java.lang.String[] args)	This is the main driver for recursively changing files properties.
void	setConf(org.apache.hadoop.conf.Configuration conf)
protected static void	writeString(java.io.DataOutput out, java.lang.String s)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

protected static final org.slf4j.Logger LOG

jobconf

protected org.apache.hadoop.mapred.JobConf jobconf

Method Detail

run

public int run(java.lang.String[] args)
        throws java.lang.Exception

This is the main driver for recursively changing files properties.

Throws:

java.lang.Exception

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

public org.apache.hadoop.mapred.JobConf getConf()

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

getRandomId

protected static java.lang.String getRandomId()

checkSource

protected static void checkSource(org.apache.hadoop.conf.Configuration conf,
                                  java.util.List<org.apache.hadoop.fs.Path> srcs)
                           throws org.apache.hadoop.mapred.InvalidInputException

Sanity check for source

Throws:

org.apache.hadoop.mapred.InvalidInputException

readString

protected static java.lang.String readString(java.io.DataInput in)
                                      throws java.io.IOException

Throws:

java.io.IOException

writeString

protected static void writeString(java.io.DataOutput out,
                                  java.lang.String s)
                           throws java.io.IOException

Throws:

java.io.IOException

readFile

protected static java.util.List<java.lang.String> readFile(org.apache.hadoop.conf.Configuration conf,
                                                           org.apache.hadoop.fs.Path inputfile)
                                                    throws java.io.IOException

Throws:

java.io.IOException