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
 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


Copyright © 2012 Apache Software Foundation. All Rights Reserved.