org.apache.hadoop.mapreduce.lib.map

类 TokenCounterMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<Object,Text,Text,IntWritable>

org.apache.hadoop.mapreduce.lib.map.TokenCounterMapper

public class TokenCounterMapper
extends Mapper<Object,Text,Text,IntWritable>

Tokenize the input values and emit each word with a count of 1.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.mapreduce.Mapper

Mapper.Context

构造器概要

构造器

构造器和说明
TokenCounterMapper()

方法概要

方法

限定符和类型	方法和说明
void	map(Object key, Text value, Mapper.Context context) Called once for each key/value pair in the input split.

从类继承的方法 org.apache.hadoop.mapreduce.Mapper

cleanup, run, setup

从类继承的方法 java.lang.Object

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

构造器详细资料

TokenCounterMapper

public TokenCounterMapper()

方法详细资料

map

public void map(Object key,
       Text value,
       Mapper.Context context)
         throws IOException,
                InterruptedException

从类复制的说明: Mapper

Called once for each key/value pair in the input split. Most applications should override this, but the default is the identity function.

覆盖:

map 在类中 Mapper<Object,Text,Text,IntWritable>

抛出:

IOException

InterruptedException