public void execute()

in server/base/src/main/java/org/apache/accumulo/server/util/Admin.java [434:576]
115 lines of code
30 McCabe index (conditional complexity)

  public void execute(final String[] args) {

    ServerUtilOpts opts = new ServerUtilOpts();
    JCommander cl = new JCommander(opts);
    cl.setProgramName("accumulo admin");

    ServiceStatusCmdOpts serviceStatusCommandOpts = new ServiceStatusCmdOpts();
    cl.addCommand("serviceStatus", serviceStatusCommandOpts);

    ChangeSecretCommand changeSecretCommand = new ChangeSecretCommand();
    cl.addCommand("changeSecret", changeSecretCommand);

    CheckCommand checkCommand = new CheckCommand();
    cl.addCommand("check", checkCommand);

    DeleteZooInstanceCommand deleteZooInstOpts = new DeleteZooInstanceCommand();
    cl.addCommand("deleteZooInstance", deleteZooInstOpts);

    DumpConfigCommand dumpConfigCommand = new DumpConfigCommand();
    cl.addCommand("dumpConfig", dumpConfigCommand);

    FateOpsCommand fateOpsCommand = new FateOpsCommand();
    cl.addCommand("fate", fateOpsCommand);

    GracefulShutdownCommand gracefulShutdownCommand = new GracefulShutdownCommand();
    cl.addCommand("signalShutdown", gracefulShutdownCommand);

    ListInstancesCommand listInstancesOpts = new ListInstancesCommand();
    cl.addCommand("listInstances", listInstancesOpts);

    TabletServerLocksCommand tServerLocksOpts = new TabletServerLocksCommand();
    cl.addCommand("locks", tServerLocksOpts);

    PingCommand pingCommand = new PingCommand();
    cl.addCommand("ping", pingCommand);

    RestoreZooCommand restoreZooOpts = new RestoreZooCommand();
    cl.addCommand("restoreZoo", restoreZooOpts);

    StopCommand stopOpts = new StopCommand();
    cl.addCommand("stop", stopOpts);

    StopAllCommand stopAllOpts = new StopAllCommand();
    cl.addCommand("stopAll", stopAllOpts);

    StopManagerCommand stopManagerOpts = new StopManagerCommand();
    cl.addCommand("stopManager", stopManagerOpts);

    VerifyTabletAssignmentsCommand verifyTabletAssignmentsOpts =
        new VerifyTabletAssignmentsCommand();
    cl.addCommand("verifyTabletAssigns", verifyTabletAssignmentsOpts);

    VolumesCommand volumesCommand = new VolumesCommand();
    cl.addCommand("volumes", volumesCommand);

    cl.parse(args);

    if (cl.getParsedCommand() == null) {
      cl.usage();
      return;
    }

    for (var command : cl.getCommands().entrySet()) {
      var objects = command.getValue().getObjects();
      for (var obj : objects) {
        if (obj instanceof SubCommandOpts && ((SubCommandOpts) obj).help) {
          command.getValue().usage();
          return;
        }
      }
    }

    try (ServerContext context = opts.getServerContext()) {

      AccumuloConfiguration conf = context.getConfiguration();
      // Login as the server on secure HDFS
      if (conf.getBoolean(Property.INSTANCE_RPC_SASL_ENABLED)) {
        SecurityUtil.serverLogin(conf);
      }

      int rc = 0;

      if (cl.getParsedCommand().equals("listInstances")) {
        ListInstances.listInstances(context.getZooKeepers(), listInstancesOpts.printAll,
            listInstancesOpts.printErrors);
      } else if (cl.getParsedCommand().equals("ping")) {
        if (ping(context, pingCommand.args) != 0) {
          rc = 4;
        }
      } else if (cl.getParsedCommand().equals("stop")) {
        stopTabletServer(context, stopOpts.args, stopOpts.force);
      } else if (cl.getParsedCommand().equals("signalShutdown")) {
        signalGracefulShutdown(context, gracefulShutdownCommand.address);
      } else if (cl.getParsedCommand().equals("dumpConfig")) {
        printConfig(context, dumpConfigCommand);
      } else if (cl.getParsedCommand().equals("volumes")) {
        ListVolumesUsed.listVolumes(context);
      } else if (cl.getParsedCommand().equals("verifyTabletAssigns")) {
        VerifyTabletAssignments.execute(opts.getClientProps(), verifyTabletAssignmentsOpts.verbose);
      } else if (cl.getParsedCommand().equals("changeSecret")) {
        ChangeSecret.execute(context, conf);
      } else if (cl.getParsedCommand().equals("deleteZooInstance")) {
        DeleteZooInstance.execute(context, deleteZooInstOpts.clean, deleteZooInstOpts.instance,
            deleteZooInstOpts.auth);
      } else if (cl.getParsedCommand().equals("restoreZoo")) {
        RestoreZookeeper.execute(conf, restoreZooOpts.file, restoreZooOpts.overwrite);
      } else if (cl.getParsedCommand().equals("locks")) {
        TabletServerLocks.execute(context, args.length > 2 ? args[2] : null,
            tServerLocksOpts.delete);
      } else if (cl.getParsedCommand().equals("fate")) {
        executeFateOpsCommand(context, fateOpsCommand);
      } else if (cl.getParsedCommand().equals("serviceStatus")) {
        ServiceStatusCmd ssc = new ServiceStatusCmd();
        ssc.execute(context, serviceStatusCommandOpts.json, serviceStatusCommandOpts.noHosts);
      } else if (cl.getParsedCommand().equals("check")) {
        executeCheckCommand(context, checkCommand, opts);
      } else if (cl.getParsedCommand().equals("stopManager")
          || cl.getParsedCommand().equals("stopAll")) {
        boolean everything = cl.getParsedCommand().equals("stopAll");

        if (everything) {
          flushAll(context);
        }

        stopServer(context, everything);
      } else {
        cl.usage();
      }

      if (rc != 0) {
        System.exit(rc);
      }
    } catch (AccumuloException e) {
      log.error("{}", e.getMessage(), e);
      System.exit(1);
    } catch (AccumuloSecurityException e) {
      log.error("{}", e.getMessage(), e);
      System.exit(2);
    } catch (Exception e) {
      log.error("{}", e.getMessage(), e);
      System.exit(3);
    }
  }