CountryInterestMR.java

package mobvista.prd.datasource.country.interest.mapreduce;

import mobvista.dmp.util.MRUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.GzipCodec;
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 org.apache.hadoop.util.GenericOptionsParser;

import java.io.IOException;

/**
 * Created by Administrator on 2017/5/12 0012.
 */
public class CountryInterestMR {
    public static void main(String[] args) throws InterruptedException, IOException, ClassNotFoundException {
        Configuration conf = new Configuration();
        conf.set("mapreduce.map.speculative", "true");
        conf.set("mapreduce.reduce.speculative", "true");
        conf.set("mapreduce.job.reduce.slowstart.completedmaps", "1.0");
        conf.set("mapreduce.job.speculative.slowtaskthreshold", "1.0");
        conf.set("mapreduce.reduce.memory.mb", "2250");
        String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

        Job job = Job.getInstance(conf, "CountryInterestMR");
        FileOutputFormat.setCompressOutput(job, true);
        FileOutputFormat.setOutputCompressorClass(job, GzipCodec.class);
        job.setNumReduceTasks(Integer.parseInt(otherArgs[3]));
        job.setJarByClass(CountryInterestMR.class);

        job.setMapperClass(CountryInterestMapper.class);

        job.setReducerClass(CountryInterestReducer.class);

        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);

        FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
        FileInputFormat.addInputPath(job, new Path(otherArgs[1]));
        FileOutputFormat.setOutputPath(job, new Path(otherArgs[2]));

        System.exit(job.waitForCompletion(true) ? 0 : 1);
    }

    public static class CountryInterestMapper extends Mapper<LongWritable ,Text, Text, Text> {
        Text outKey = new Text();
        Text outValue = new Text();
        public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
            try {
                String[] arr = MRUtils.SPLITTER.split(value.toString(), -1);
                String inputFile = context.getConfiguration().get("map.input.file");
                if (inputFile.contains("etl_dsp_request_daily")) { //dsp
                    outKey.set(MRUtils.JOINER.join(arr[0], arr[1]));//device_id,device_type
                    outValue.set(arr[3] + "\t" + "");//国家
                    context.write(outKey, outValue);
                } else if (inputFile.contains("dm_interest_tag")) {  //dm_interest_tag
                    outKey.set(MRUtils.JOINER.join(arr[0], arr[1]));//device_id,device_type
                    outValue.set(arr[3]);//兴趣
                    context.write(outKey, outValue);
                } else if (inputFile.contains("etl_adn_sdk_request_daily")) {  // M系统
                    outKey.set(MRUtils.JOINER.join(arr[0], arr[1]));//device_id,device_type
                    outValue.set(arr[2] + "\t" + "");//国家
                    context.write(outKey, outValue);
                }
            } catch (Exception e) {
                return;
            }
        }
    }
    public static class CountryInterestReducer extends Reducer<Text, Text, Text, Text> {
        Text outKey = new Text();
        Text outValue = new Text();
        public void reduce (Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
            String country = "";
            String interest = "";
            for (Text val : values) {
                if (val.toString().contains("\t")) {
                    country = val.toString().split("\t",-1)[0];
                } else {
                    interest = val.toString();
                }
            }
            if (country.equals("")) {
                return;
            }
            if (interest.equals("")) {
                return;
            }
            outValue.set(MRUtils.JOINER.join(country,interest));
            context.write(key, outValue);
        }
    }
}