com.niuwa.hadoop.chubao.job.IndicatorJob002.java Source code

Introduction

Here is the source code for com.niuwa.hadoop.chubao.job.IndicatorJob002.java

Source

package com.niuwa.hadoop.chubao.job;

/**
 * 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.
 */
import java.io.IOException;
import java.util.Date;
import java.util.Map;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

import com.alibaba.fastjson.JSONObject;
import com.niuwa.hadoop.chubao.ChubaoJobConfig;
import com.niuwa.hadoop.chubao.RunParams;
import com.niuwa.hadoop.chubao.rules.Rules;
import com.niuwa.hadoop.util.HadoopUtil;

/**
 * 
 * ?<br> 
 * ??contact
 * contact_sum?user_id
 * @author maliqiang
 * @since 2016-7-4 
 */
public class IndicatorJob002 extends BaseJob {
    public static class UserIdMapper extends Mapper<Object, Text, Text, IntWritable> {
        private Text outKey = new Text();
        private final static IntWritable one = new IntWritable(1);
        Date now = new Date();

        public void map(Object key, Text value, Context context) throws IOException, InterruptedException {
            JSONObject form = JSONObject.parseObject(value.toString());
            //condition1 ???3
            if (ChubaoJobConfig.isDebugMode() || (Rules.isMatchedRule_1(form.getLong("device_activation")))) {
                outKey.set(form.getString("user_id"));
                context.write(outKey, one);
            }
        }
    }

    public static class CombinerSumReducer extends Reducer<Text, IntWritable, Text, IntWritable> {
        private IntWritable result = new IntWritable();

        public void reduce(Text key, Iterable<IntWritable> values, Context context)
                throws IOException, InterruptedException {
            int sum = 0;
            for (IntWritable val : values) {
                sum += val.get();
            }

            result.set(sum);
            context.write(key, result);
        }
    }

    public static class IntSumReducer extends Reducer<Text, IntWritable, NullWritable, Text> {
        private JSONObject result = new JSONObject();

        public void reduce(Text key, Iterable<IntWritable> values, Context context)
                throws IOException, InterruptedException {
            int sum = 0;
            for (IntWritable val : values) {
                sum += val.get();
            }
            //user_id??
            result.put("user_id", key.toString());
            result.put("contact_sum", sum);

            context.write(NullWritable.get(), new Text(result.toJSONString()));
        }
    }

    @Override
    public void setJobSpecialInfo(Job job, Configuration conf, RunParams params, Map<String, Path> tempPaths)
            throws Exception {

        job.setMapperClass(IndicatorJob002.UserIdMapper.class);
        job.setCombinerClass(IndicatorJob002.CombinerSumReducer.class);
        job.setReducerClass(IndicatorJob002.IntSumReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);

        // 
        FileInputFormat.addInputPath(job, ChubaoJobConfig.getInputPath(ChubaoJobConfig.INPUT_CONTACT));
        // 
        FileOutputFormat.setOutputPath(job, tempPaths.get(IndicatorJob002.class.getName()));
        // 
        HadoopUtil.deleteOutputFile(tempPaths.get(IndicatorJob002.class.getName()));

    }

}