| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.mapred; |
| |
| import java.io.IOException; |
| |
| /** |
| * Collects the <code><key, value></code> pairs output by {@link Mapper}s |
| * and {@link Reducer}s. |
| * |
| * <p><code>OutputCollector</code> is the generalization of the facility |
| * provided by the Map-Reduce framework to collect data output by either the |
| * <code>Mapper</code> or the <code>Reducer</code> i.e. intermediate outputs |
| * or the output of the job.</p> |
| */ |
| public interface OutputCollector<K, V> { |
| |
| /** Adds a key/value pair to the output. |
| * |
| * @param key the key to collect. |
| * @param value to value to collect. |
| * @throws IOException |
| */ |
| void collect(K key, V value) throws IOException; |
| } |