org.apache.hadoop.mapred

Interface OutputCollector<K,V>

@InterfaceAudience.Public
 @InterfaceStability.Stable
public interface OutputCollector<K,V>

Collects the <key, value> pairs output by Mappers and Reducers.

OutputCollector is the generalization of the facility provided by the Map-Reduce framework to collect data output by either the Mapper or the Reducer i.e. intermediate outputs or the output of the job.

Method Summary

Modifier and Type	Method and Description
void	collect(K key, V value) Adds a key/value pair to the output.

Method Detail

collect

void collect(K key,
             V value)
      throws IOException

Adds a key/value pair to the output.

Parameters:

key - the key to collect.

value - to value to collect.

Throws:

IOException