org.apache.hadoop.examples

类 MultiFileWordCount

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.examples.MultiFileWordCount

所有已实现的接口:

Configurable, Tool

public class MultiFileWordCount
extends Configured
implements Tool

MultiFileWordCount is an example to demonstrate the usage of MultiFileInputFormat. This examples counts the occurrences of words in the text files under the given input directory.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	MultiFileWordCount.MapClass This Mapper is similar to the one in WordCount.MapClass.
static class	MultiFileWordCount.MultiFileLineRecordReader RecordReader is responsible from extracting records from the InputSplit.
static class	MultiFileWordCount.MyInputFormat To use MultiFileInputFormat, one should extend it, to return a (custom) RecordReader.
static class	MultiFileWordCount.WordOffset This record keeps <filename,offset> pairs.

构造器概要

构造器

构造器和说明
MultiFileWordCount()

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) Execute the command with the given arguments.

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

MultiFileWordCount

public MultiFileWordCount()

方法详细资料

run

public int run(String[] args)
        throws Exception

从接口复制的说明: Tool

Execute the command with the given arguments.

指定者:

run 在接口中 Tool

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