org.apache.hadoop.fs.shell
Class Command

java.lang.Object
  org.apache.hadoop.fs.shell.Command

Direct Known Subclasses:

Count

public abstract class Command
extends Object

An abstract class for the execution of a file system command

Field Summary

protected String[]	args
protected FileSystem	fs

Constructor Summary

protected

Command(FileSystem fs) Constructor

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

fs

protected final FileSystem fs

args

protected String[] args

Constructor Detail

Command

protected Command(FileSystem fs)

Constructor

Method Detail

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

Parameters:

path - the input path

Throws:

IOException - if any error occurs

runAll

public int runAll()

For each source path, execute the command

Returns:

0 if it runs successfully; -1 if it fails