까딱이의 춤과 IT

 public void run(Context context) throws IOException, InterruptedException {

    setup(context);

    try {

      while (context.nextKeyValue()) {

        map(context.getCurrentKey(), context.getCurrentValue(), context);

      }

    } finally {

      cleanup(context);

    }

  }

 public class AnalyserDriver {

   public static void main(String argv[]) {

     int exitCode = -1;

     ProgramDriver programDriver = new ProgramDriver();

     try {

          programDriver.addClass("standarddeviation", StandardDeviationDriver.class, 

                "A map/reduce program that calculate the standarddeviation in the input files.");

 programDriver.addClass("mode", ModeDriver.class, 

                "A map/reduce program that calculates the mode in the input files.");

programDriver.addClass("max", Max.class, 

  "A map/reduce program that max the total row in the input files.");

          programDriver.addClass("min", Min.class, 

                "A map/reduce program that min the total row in the input files.");

          programDriver.addClass("median", Median.class,

                "A map/reduce program that median the total row in the input files.");

        exitCode = programDriver.run(argv); 

    } catch (Throwable e) {

          e.printStackTrace();

    }

    System.exit(exitCode);

  }

}