com.jbw.jobcontrol.Patent.java Source code

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Here is the source code for com.jbw.jobcontrol.Patent.java

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/*
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package com.jbw.jobcontrol;

import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.jobcontrol.JobControl;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.chain.ChainMapper;
import org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob;
import org.apache.hadoop.mapreduce.lib.map.InverseMapper;
import org.apache.hadoop.mapreduce.lib.reduce.IntSumReducer;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

/**
 *
 * @author alvin
 */
public class Patent extends Configured implements Tool {

    static class CountMapper extends Mapper<Text, Text, Text, IntWritable> {

        private final IntWritable v = new IntWritable(1);

        @Override
        protected void map(Text key, Text value, Context context) throws IOException, InterruptedException {
            context.write(key, v);
        }
    }

    @Override
    public int run(String[] strings) throws Exception {
        Configuration conf = getConf();
        Job job1 = Job.getInstance(conf);
        job1.setJobName("test");
        job1.setJarByClass(Patent.class);

        ChainMapper.addMapper(job1, InverseMapper.class, LongWritable.class, Text.class, Text.class, Text.class,
                conf);
        ChainMapper.addMapper(job1, CountMapper.class, Text.class, Text.class, Text.class, IntWritable.class, conf);

        job1.setReducerClass(IntSumReducer.class);

        Job job2 = Job.getInstance();
        ControlledJob cjob1 = new ControlledJob(job1.getConfiguration());
        ControlledJob cjob2 = new ControlledJob(job2.getConfiguration());
        cjob2.addDependingJob(cjob1);
        JobControl jc = new JobControl("process job");
        jc.addJob(cjob1);
        jc.addJob(cjob2);
        Thread t = new Thread(jc);
        t.start();
        while (true) {
            for (ControlledJob j : jc.getRunningJobList()) {
                break;
            }
            break;
        }
        return 0;
    }

    public static void main(String[] args) throws Exception {
        System.exit(ToolRunner.run(new Patent(), args));
    }
}