void handleCommandLine()

in monitoring/cloud-client/src/main/java/com/example/monitoring/Snippets.java [440:525]
82 lines of code
22 McCabe index (conditional complexity)

  void handleCommandLine(String commandLine) throws IOException {
    String[] args = commandLine.split("\\s+");

    if (args.length < 1) {
      throw new IllegalArgumentException("not enough args");
    }

    String command = args[0];
    switch (command) {
      case "new-metric-descriptor":
        // Everything after the first whitespace token is interpreted to be the description.
        args = commandLine.split("\\s+", 2);
        if (args.length != 2) {
          throw new IllegalArgumentException("usage: <type>");
        }
        // Set created to now() and done to false.
        createMetricDescriptor(args[1]);
        System.out.println("Metric descriptor created");
        break;
      case "list-metric-descriptors":
        args = commandLine.split("\\s+", 2);
        if (args.length != 1) {
          throw new IllegalArgumentException("usage: no arguments");
        }
        listMetricDescriptors();
        break;
      case "list-monitored-resources":
        args = commandLine.split("\\s+", 2);
        if (args.length != 1) {
          throw new IllegalArgumentException("usage: no arguments");
        }
        listMonitoredResources();
        break;
      case "get-descriptor-resource":
        args = commandLine.split("\\s+", 2);
        if (args.length != 2) {
          throw new IllegalArgumentException("usage: <type>");
        }
        describeMetricResources(args[1]);
        break;
      case "delete-metric-descriptor":
        args = commandLine.split("\\s+", 2);
        if (args.length != 2) {
          throw new IllegalArgumentException("usage: <type>");
        }
        deleteMetricDescriptor(args[1]);
        break;
      case "write-time-series":
        args = commandLine.split("\\s+", 2);
        if (args.length != 1) {
          throw new IllegalArgumentException("usage: no arguments");
        }
        writeTimeSeries();
        break;
      case "list-time-series-header":
        args = commandLine.split("\\s+", 2);
        if (args.length != 1) {
          throw new IllegalArgumentException("usage: no arguments");
        }
        listTimeSeriesHeaders();
        break;
      case "list-time-series":
        args = commandLine.split("\\s+", 2);
        if (args.length != 2) {
          throw new IllegalArgumentException("usage: <filter>");
        }
        listTimeSeries(args[1]);
        break;
      case "list-aggregate":
        args = commandLine.split("\\s+", 2);
        if (args.length != 1) {
          throw new IllegalArgumentException("usage: no arguments");
        }
        listTimeSeriesAggregrate();
        break;
      case "list-reduce":
        args = commandLine.split("\\s+", 2);
        if (args.length != 1) {
          throw new IllegalArgumentException("usage: no arguments");
        }
        listTimeSeriesReduce();
        break;
      default:
        throw new IllegalArgumentException("unrecognized command: " + command);
    }
  }