@InterfaceAudience.Public @InterfaceStability.Stable public class FieldSelectionReducer<K,V> extends Reducer<Text,Text,Text,Text>
Modifier and Type | Field and Description |
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static org.slf4j.Logger |
LOG |
Constructor and Description |
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FieldSelectionReducer() |
Modifier and Type | Method and Description |
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void |
reduce(Text key,
Iterable<Text> values,
org.apache.hadoop.mapreduce.Reducer.Context context)
This method is called once for each key.
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void |
setup(org.apache.hadoop.mapreduce.Reducer.Context context)
Called once at the start of the task.
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public void setup(org.apache.hadoop.mapreduce.Reducer.Context context) throws IOException, InterruptedException
Reducer
setup
in class Reducer<Text,Text,Text,Text>
IOException
InterruptedException
public void reduce(Text key, Iterable<Text> values, org.apache.hadoop.mapreduce.Reducer.Context context) throws IOException, InterruptedException
Reducer
reduce
in class Reducer<Text,Text,Text,Text>
IOException
InterruptedException
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