public static void main()

in twill-examples/yarn/src/main/java/org/apache/twill/example/yarn/BundledJarExample.java [74:115]

35 lines of code
3 McCabe index (conditional complexity)


  public static void main(String[] args) {
    if (args.length < 3) {
      System.err.println("Arguments format: <host:port of zookeeper server>"
                           + " <bundle jar path> <main class name> <extra args>");
      System.exit(1);
    }

    String zkStr = args[0];
    BundledJarRunner.Arguments arguments = new BundledJarRunner.Arguments(
            args[1], "/lib", args[2], Arrays.copyOfRange(args, 3, args.length));

    File jarFile = new File(arguments.getJarFileName());
    Preconditions.checkState(jarFile.exists());
    Preconditions.checkState(jarFile.canRead());

    final TwillRunnerService twillRunner = new YarnTwillRunnerService(new YarnConfiguration(), zkStr);
    twillRunner.start();


    final TwillController controller = twillRunner.prepare(
      new ExampleBundledJarApp(jarFile.getName(), jarFile.toURI()))
      .withArguments("BundledJarRunnable", arguments.toArray())
      .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true)))
      .start();

    Runtime.getRuntime().addShutdownHook(new Thread() {
      @Override
      public void run() {
        try {
          Futures.getUnchecked(controller.terminate());
        } finally {
          twillRunner.stop();
        }
      }
    });

    try {
      controller.awaitTerminated();
    } catch (ExecutionException e) {
      LOG.error("Error", e);
    }
  }