content: package hip.ch3.seqfile.protobuf;
  
  
  import hip.util.Cli;
  import hip.util.CliCommonOpts;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.conf.Configured;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.io.SequenceFile;
  import org.apache.hadoop.io.Text;
  import org.apache.hadoop.util.Tool;
  import org.apache.hadoop.util.ToolRunner;
  
  import static hip.ch3.proto.StockProtos.Stock;
  
  public class SequenceFileProtobufReader extends Configured implements Tool {
    /**
     * Main entry point for the example.
     *
     * @param args arguments
     * @throws Exception when something goes wrong
     */
    public static void main(final String[] args) throws Exception {
      int res = ToolRunner.run(new Configuration(), new SequenceFileProtobufReader(), args);
      System.exit(res);
    }
  
    /**
     * Read the sequence file.
     *
     * @param args the command-line arguments
     * @return the process exit code
     * @throws Exception if something goes wrong
     */
    public int run(final String[] args) throws Exception {
  
      Cli cli = Cli.builder().setArgs(args).addOptions(CliCommonOpts.MrIOpts.values()).build();
      int result = cli.runCmd();
  
      if (result != 0) {
        return result;
      }
  
      Path inputFile = new Path(cli.getArgValueAsString(CliCommonOpts.MrIOpts.INPUT));
  
      Configuration conf = super.getConf();
  
      ProtobufSerialization.register(conf);
  
      SequenceFile.Reader reader =   //<co id="ch03_comment_seqfile_read1"/>
          new SequenceFile.Reader(conf,
              SequenceFile.Reader.file(inputFile));
  
      try {
        Text key = new Text();
        Stock value = Stock.getDefaultInstance();
  
        while (reader.next(key)) {   //<co id="ch03_comment_seqfile_read2"/>
          value = (Stock) reader.getCurrentValue(value);
          System.out.println(key + "," + value);
        }
      } finally {
        reader.close();
      }
      return 0;
    }
  }
  