org.apache.mahout.vectorizer.term
Class TermCountReducer
java.lang.Object
org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>
org.apache.mahout.vectorizer.term.TermCountReducer
public class TermCountReducer
- extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>
Can also be used as a local Combiner. This accumulates all the words and the weights and sums them up.
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer |
org.apache.hadoop.mapreduce.Reducer.Context |
Method Summary |
protected void |
reduce(org.apache.hadoop.io.Text key,
java.lang.Iterable<org.apache.hadoop.io.LongWritable> values,
org.apache.hadoop.mapreduce.Reducer.Context context)
|
protected void |
setup(org.apache.hadoop.mapreduce.Reducer.Context context)
|
Methods inherited from class org.apache.hadoop.mapreduce.Reducer |
cleanup, run |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TermCountReducer
public TermCountReducer()
reduce
protected void reduce(org.apache.hadoop.io.Text key,
java.lang.Iterable<org.apache.hadoop.io.LongWritable> values,
org.apache.hadoop.mapreduce.Reducer.Context context)
throws java.io.IOException,
java.lang.InterruptedException
- Overrides:
reduce
in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>
- Throws:
java.io.IOException
java.lang.InterruptedException
setup
protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
throws java.io.IOException,
java.lang.InterruptedException
- Overrides:
setup
in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.LongWritable>
- Throws:
java.io.IOException
java.lang.InterruptedException
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