org.apache.hadoop.tools

类 DistCh

java.lang.Object

org.apache.hadoop.tools.DistCh

所有已实现的接口:

Configurable, Tool

public class DistCh
extends Object

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

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	DistTool.DuplicationException An exception class for duplicated source files.

字段概要

字段

限定符和类型	字段和说明
protected JobConf	jobconf
protected static org.apache.commons.logging.Log	LOG

方法概要

方法

限定符和类型	方法和说明
protected static void	checkSource(Configuration conf, List<Path> srcs) Sanity check for source
JobConf	getConf() Return the configuration used by this object.
protected static String	getRandomId()
static void	main(String[] args)
protected static List<String>	readFile(Configuration conf, Path inputfile)
protected static String	readString(DataInput in)
int	run(String[] args) This is the main driver for recursively changing files properties.
void	setConf(Configuration conf) Set the configuration to be used by this object.
protected static void	writeString(DataOutput out, String s)

从类继承的方法 java.lang.Object

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

字段详细资料

LOG

protected static final org.apache.commons.logging.Log LOG

jobconf

protected JobConf jobconf

方法详细资料

run

public int run(String[] args)
        throws Exception

This is the main driver for recursively changing files properties.

参数:

args - command specific arguments.

返回:

exit code.

抛出:

Exception

main

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

抛出:

Exception

setConf

public void setConf(Configuration conf)

Set the configuration to be used by this object.

指定者:

setConf 在接口中 Configurable

getConf

public JobConf getConf()

Return the configuration used by this object.

指定者:

getConf 在接口中 Configurable

getRandomId

protected static String getRandomId()

checkSource

protected static void checkSource(Configuration conf,
               List<Path> srcs)
                           throws InvalidInputException

Sanity check for source

抛出:

InvalidInputException

readString

protected static String readString(DataInput in)
                            throws IOException

抛出:

IOException

writeString

protected static void writeString(DataOutput out,
               String s)
                           throws IOException

抛出:

IOException

readFile

protected static List<String> readFile(Configuration conf,
                    Path inputfile)
                                throws IOException

抛出:

IOException