org.apache.hadoop.examples

类 Sort<K,V>

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.examples.Sort<K,V>

所有已实现的接口:

Configurable, Tool

public class Sort<K,V>
extends Configured
implements Tool

This is the trivial map/reduce program that does absolutely nothing other than use the framework to fragment and sort the input values. To run: bin/hadoop jar build/hadoop-examples.jar sort [-m maps] [-r reduces] [-inFormat input format class] [-outFormat output format class] [-outKey output key class] [-outValue output value class] [-totalOrder pcnt num samples max splits] in-dir out-dir

构造器概要

构造器

构造器和说明
Sort()

方法概要

方法

限定符和类型	方法和说明
RunningJob	getResult() Get the last job that was run using this instance.
static void	main(String[] args)
int	run(String[] args) The main driver for sort program.

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

从接口继承的方法 org.apache.hadoop.conf.Configurable

getConf, setConf

构造器详细资料

Sort

public Sort()

方法详细资料

run

public int run(String[] args)
        throws Exception

The main driver for sort program. Invoke this method to submit the map/reduce job.

指定者:

run 在接口中 Tool

参数:

args - command specific arguments.

返回:

exit code.

抛出:

IOException - When there is communication problems with the job tracker.

Exception

main

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

抛出:

Exception

getResult

public RunningJob getResult()

Get the last job that was run using this instance.

返回:

the results of the last job that was run