public static void main()

in spanner/leaderboard/step6/src/main/java/com/google/codelabs/App.java [286:331]
46 lines of code
9 McCabe index (conditional complexity)

  public static void main(String[] args) throws Exception {
    if (!(args.length == 3 || args.length == 4)) {
      printUsageAndExit();
    }
    SpannerOptions options = SpannerOptions.newBuilder().build();
    Spanner spanner = options.getService();
    try {
      String command = args[0];
      DatabaseId db = DatabaseId.of(options.getProjectId(), args[1], args[2]);
      DatabaseClient dbClient = spanner.getDatabaseClient(db);
      DatabaseAdminClient dbAdminClient = spanner.getDatabaseAdminClient();
      switch (command) {
        case "create":
          create(dbAdminClient, db);
          break;
        case "insert":
          String insertType;
          try {
            insertType = args[3];
          } catch (ArrayIndexOutOfBoundsException exception) {
            insertType = "";
          }
          insert(dbClient, insertType);
          break;
        case "query":
          if (args.length == 4) {
            int timespan = 0;
            try {
              timespan = Integer.parseInt(args[3]);
            } catch (NumberFormatException e) {
              System.err.println("query command's 'timespan' parameter must be a valid integer.");
              System.exit(1);
            }
            query(dbClient, timespan);
          } else {
            query(dbClient);
          }
          break;
        default:
          printUsageAndExit();
      }
    } finally {
      spanner.close();
    }
    System.out.println("Closed client");
  }