content: package com.manning.hip.ch2;
  
  import com.manning.hip.ch3.StockPriceWritable;
  import com.manning.hip.ch3.avro.gen.*;
  import com.manning.hip.common.JobHelper;
  import org.apache.avro.mapred.*;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.io.*;
  import org.apache.hadoop.io.compress.SnappyCodec;
  import org.apache.hadoop.mapred.*;
  import org.apache.hadoop.mapred.lib.db.*;
  
  import java.io.IOException;
  
  public final class DBImportMapReduce {
  
    public static void main(String... args) throws Exception {
      runJob(args[0], args[1]);
    }
  
    public static void runJob(String mysqlJar, String output)
        throws Exception {
  
      Configuration conf = new Configuration();
  
      JobHelper.addJarForJob(conf, mysqlJar);
  
      DBConfiguration.configureDB(conf, "com.mysql.jdbc.Driver",
          "jdbc:mysql://localhost/sqoop_test" +
              "?user=hip_sqoop_user&password=password");
  
      JobConf job = new JobConf(conf);
      job.setJarByClass(DBImportMapReduce.class);
      Path outputPath = new Path(output);
  
      outputPath.getFileSystem(job).delete(outputPath, true);
  
      job.setInputFormat(DBInputFormat.class);
      job.setOutputFormat(AvroOutputFormat.class);
      AvroJob.setOutputSchema(job, Stock.SCHEMA$);
      job.set(AvroJob.OUTPUT_CODEC, SnappyCodec.class.getName());
  
      job.setMapperClass(Map.class);
  
      job.setNumMapTasks(4);
      job.setNumReduceTasks(0);
  
      job.setMapOutputKeyClass(AvroWrapper.class);
      job.setMapOutputValueClass(NullWritable.class);
  
      job.setOutputKeyClass(AvroWrapper.class);
      job.setOutputValueClass(NullWritable.class);
  
      FileOutputFormat.setOutputPath(job, outputPath);
  
      DBInputFormat.setInput(
          job,
          StockRecord.class,
          "select * from stocks",
          "SELECT COUNT(id) FROM stocks");
  
      JobClient.runJob(job);
    }
  
      public static class Map implements
          Mapper<LongWritable, StockRecord, AvroWrapper<Stock>, NullWritable> {
  
      public void map(LongWritable key,
                      StockRecord value,
                      OutputCollector<AvroWrapper<Stock>, NullWritable> output,
                      Reporter reporter) throws IOException {
        output.collect(
            new AvroWrapper<Stock>(writableToAvro(value)),
            NullWritable.get());
      }
  
      public void close() throws IOException {
      }
  
      public void configure(JobConf job) {
      }
    }
  
    public static Stock writableToAvro(StockPriceWritable writable) {
      Stock avro = new Stock();
      avro.symbol = writable.getSymbol();
      avro.date = writable.getDate();
      avro.open = writable.getOpen();
      avro.high = writable.getHigh();
      avro.low = writable.getLow();
      avro.close = writable.getClose();
      avro.volume = writable.getVolume();
      avro.adjClose = writable.getAdjClose();
      return avro;
    }
  
  }
  