@InterfaceAudience.Public @InterfaceStability.Stable public class ValueAggregatorMapper<K1 extends org.apache.hadoop.io.WritableComparable<?>,V1 extends org.apache.hadoop.io.Writable> extends Mapper<K1,V1,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>
Mapper.Context| Constructor and Description |
|---|
ValueAggregatorMapper() |
| Modifier and Type | Method and Description |
|---|---|
void |
map(K1 key,
V1 value,
Mapper.Context context)
the map function.
|
void |
setup(Mapper.Context context)
Called once at the beginning of the task.
|
public void setup(Mapper.Context context) throws IOException, InterruptedException
Mappersetup in class Mapper<K1 extends org.apache.hadoop.io.WritableComparable<?>,V1 extends org.apache.hadoop.io.Writable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>IOExceptionInterruptedExceptionpublic void map(K1 key, V1 value, Mapper.Context context) throws IOException, InterruptedException
map in class Mapper<K1 extends org.apache.hadoop.io.WritableComparable<?>,V1 extends org.apache.hadoop.io.Writable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>IOExceptionInterruptedExceptionCopyright © 2008–2022 Apache Software Foundation. All rights reserved.