org.apache.mahout.cf.taste.hadoop.pseudo
Class UserIDsMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,VarLongWritable,org.apache.hadoop.io.NullWritable>
      extended by org.apache.mahout.cf.taste.hadoop.pseudo.UserIDsMapper

public final class UserIDsMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,VarLongWritable,org.apache.hadoop.io.NullWritable>

Extracts and emits all user IDs from the users file, or input file.


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Constructor Summary
UserIDsMapper()
           
 
Method Summary
protected  void map(org.apache.hadoop.io.LongWritable key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapreduce.Mapper.Context context)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
cleanup, run, setup
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

UserIDsMapper

public UserIDsMapper()
Method Detail

map

protected void map(org.apache.hadoop.io.LongWritable key,
                   org.apache.hadoop.io.Text value,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws java.io.IOException,
                   java.lang.InterruptedException
Overrides:
map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,VarLongWritable,org.apache.hadoop.io.NullWritable>
Throws:
java.io.IOException
java.lang.InterruptedException


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