org.apache.hadoop.mapred

Interface OutputCollector<K,V>

All Known Implementing Classes:

Task.CombineOutputCollector

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

Methods

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 java.io.IOException

Adds a key/value pair to the output.

Parameters:

key - the key to collect.

value - to value to collect.

Throws:

java.io.IOException