public static class WordStandardDeviation.WordStandardDeviationReducer
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>
Constructor and Description |
---|
WordStandardDeviation.WordStandardDeviationReducer() |
public WordStandardDeviation.WordStandardDeviationReducer()
public void reduce(org.apache.hadoop.io.Text key, Iterable<org.apache.hadoop.io.LongWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context) throws IOException, InterruptedException
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>
key
- This will be one of 2 constants: LENGTH_STR, COUNT_STR, or
SQUARE_STR.values
- This will be an iterator of all the values associated with that
key.IOException
InterruptedException
Copyright © 2015 Apache Software Foundation. All Rights Reserved.