public int run()

in cli/src/main/java/org/apache/uniffle/cli/UniffleCLI.java [131:238]
86 lines of code
16 McCabe index (conditional complexity)

  public int run(String[] args) throws UniffleCliArgsException, JsonProcessingException {
    final CommandLine cmd = parseCommandLineOptions(args, true);

    if (args.length < 1) {
      printUsage();
      return EXIT_ERROR;
    }

    if (cmd.hasOption(help.getOpt())) {
      printUsage();
      return 0;
    }

    if (cmd.hasOption(uniffleClientCli.getOpt())) {
      String cliArgs = cmd.getOptionValue(uniffleClientCli.getOpt());
      System.out.println("uniffle-client-cli : " + cliArgs);
      return EXIT_SUCCESS;
    }

    if (cmd.hasOption(uniffleAdminCli.getOpt())) {
      String cliArgs = cmd.getOptionValue(uniffleAdminCli.getOpt());
      System.out.println("uniffle-admin-cli : " + cliArgs);
      return EXIT_SUCCESS;
    }

    if (cmd.hasOption(coordinatorHost.getOpt()) && cmd.hasOption(coordinatorPort.getOpt())) {
      getUniffleRestClient(cmd);

      // If we use application-cli
      if (cmd.hasOption(uniffleApplicationCli.getLongOpt())) {
        LOG.info("uniffle-client-cli : get applications");

        // If we want to output json file
        if (cmd.hasOption(uniffleOutFormat.getOpt())) {

          // Get the OutFormat.
          String outPutFormat = cmd.getOptionValue(uniffleOutFormat.getOpt()).trim();
          if (StringUtils.isBlank(outPutFormat)) {
            System.out.println("output format is not null.");
            return EXIT_ERROR;
          }

          // We allow users to enter json\Json\JSON etc.
          // If the user enters another format, we will prompt the user that we only support JSON.
          if (!StringUtils.equalsAnyIgnoreCase(outPutFormat, "json")) {
            System.out.println("The output currently supports only JSON format.");
            return EXIT_ERROR;
          }

          String json = getApplicationsJson(cmd);
          if (StringUtils.isBlank(json)) {
            System.out.println("no output result.");
            return EXIT_ERROR;
          }
          System.out.println("application: " + json);

          if (cmd.hasOption(uniffleOutPutFile.getOpt())) {

            // Get output file location.
            String uniffleOutPutFile = cmd.getOptionValue(uniffleOutFormat.getOpt()).trim();
            if (StringUtils.isBlank(uniffleOutPutFile)) {
              System.out.println("The output file cannot be empty.");
              return EXIT_ERROR;
            }

            try (FileOutputStream fos = new FileOutputStream(uniffleOutPutFile);
                OutputStreamWriter osw = new OutputStreamWriter(fos, StandardCharsets.UTF_8)) {
              osw.write(json);
              System.out.println(
                  "applications json data has been written to the file("
                      + uniffleOutPutFile
                      + ").");
            } catch (IOException e) {
              System.out.println(
                  "An error occurred while writing the applications json data to the file("
                      + uniffleOutPutFile
                      + ").");
              return EXIT_ERROR;
            }
          }

          return EXIT_SUCCESS;
        }

        try (PrintWriter writer =
            new PrintWriter(new OutputStreamWriter(System.out, StandardCharsets.UTF_8))) {
          CLIContentUtils formattingCLIUtils =
              new CLIContentUtils("Uniffle Applications").addHeaders(APPLICATIONS_HEADER);
          List<Application> applications = getApplications(cmd);
          if (applications != null) {
            applications.forEach(
                app ->
                    formattingCLIUtils.addLine(
                        app.getApplicationId(),
                        app.getUser(),
                        app.getRegistrationTime(),
                        app.getLastHeartBeatTime(),
                        app.getRemoteStoragePath()));
          }
          writer.print(formattingCLIUtils.render());
          writer.flush();
          return EXIT_SUCCESS;
        }
      }
    }

    return EXIT_ERROR;
  }