org.apache.hadoop.fs.shell

类 Command

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.fs.shell.Command

所有已实现的接口:

Configurable

直接已知子类:

Count

public abstract class Command
extends Configured

An abstract class for the execution of a file system command

字段概要

字段

限定符和类型	字段和说明
protected String[]	args

构造器概要

构造器

限定符	构造器和说明
protected	Command(Configuration conf) Constructor

方法概要

方法

限定符和类型	方法和说明
abstract String	getCommandName() Return the command's name excluding the leading character -
protected abstract void	run(Path path) Execute the command on the input path
int	runAll() For each source path, execute the command

从类继承的方法 org.apache.hadoop.conf.Configured

getConf, setConf

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

args

protected String[] args

构造器详细资料

Command

protected Command(Configuration conf)

Constructor

方法详细资料

getCommandName

public abstract String getCommandName()

Return the command's name excluding the leading character -

run

protected abstract void run(Path path)
                     throws IOException

Execute the command on the input path

参数:

path - the input path

抛出:

IOException - if any error occurs

runAll

public int runAll()

For each source path, execute the command

返回:

0 if it runs successfully; -1 if it fails