public class ReduceValuesByWord extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>
Constructor and Description |
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ReduceValuesByWord()
construct the reduce instance, do nothing
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public ReduceValuesByWord()
public void reduce(org.apache.hadoop.io.NullWritable timeslot, Iterable<org.apache.hadoop.io.Text> manylines, org.apache.hadoop.mapreduce.Reducer.Context context)
reduce
in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>