org.apache.hadoop.mapred

接口 OutputCollector<K,V>

所有已知实现类:

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.

方法概要

方法

限定符和类型	方法和说明
void	collect(K key, V value) Adds a key/value pair to the output.

方法详细资料

collect

void collect(K key,
           V value)
             throws IOException

Adds a key/value pair to the output.

参数:

key - the key to collect.

value - to value to collect.

抛出:

IOException