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

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.cf.taste.hadoop.pseudo.UserIDsMapper
All Implemented Interfaces:
java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable>

public final class UserIDsMapper
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable>

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


Constructor Summary
UserIDsMapper()
           
 
Method Summary
 void map(org.apache.hadoop.io.LongWritable key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable> output, org.apache.hadoop.mapred.Reporter reporter)
           
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close, configure
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.hadoop.mapred.JobConfigurable
configure
 
Methods inherited from interface java.io.Closeable
close
 

Constructor Detail

UserIDsMapper

public UserIDsMapper()
Method Detail

map

public void map(org.apache.hadoop.io.LongWritable key,
                org.apache.hadoop.io.Text value,
                org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable> output,
                org.apache.hadoop.mapred.Reporter reporter)
         throws java.io.IOException
Specified by:
map in interface org.apache.hadoop.mapred.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable>
Throws:
java.io.IOException


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