Java tutorial
/* * Copyright 2010-2011 the original author or authors. * * Licensed 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 com.ifeng.vdn.logparser.mapper; import java.io.IOException; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Reducer; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * @version 0.1 * * @author Hefei Li * * @since Mar 16, 2015 */ public class VideoLogReducer extends Reducer<Text, Text, Text, Text> { private static final Logger log = LoggerFactory.getLogger(VideoLogReducer.class); @Override protected void reduce(Text key, Iterable<Text> values, Reducer<Text, Text, Text, Text>.Context context) throws IOException, InterruptedException { for (Text value : values) { log.info("Key = {} Value = {}", key.toString(), value.toString()); context.write(key, value); } } /*@Override protected void reduce(Text key, Iterable<IntWritable> values, Reducer<Text, IntWritable, Text, IntWritable>.Context context) throws IOException, InterruptedException { for(IntWritable value : values){ log.info("Key = {} Value = {}", key.toString(), value.get()); } }*/ }