org.apache.hadoop.examples

类 Join

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.examples.Join

所有已实现的接口:

Configurable, Tool

public class Join
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 join [-m maps] [-r reduces] [-inFormat input format class] [-outFormat output format class] [-outKey output key class] [-outValue output value class] [-joinOp <inner|outer|override>] [in-dir]* in-dir out-dir

构造器概要

构造器

构造器和说明
Join()

方法概要

方法

限定符和类型	方法和说明
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

Join

public Join()

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