}
    }


    /**
     * This constructor used to instance a SigningDigest object for
     * signing/verifying SMB using kerberos session key.
     * The MAC Key = concat(Session Key, Digest of Challenge);
     * Because of Kerberos Authentication don't have challenge,
     * The MAC Key = Session Key
     * 
     * @param macSigningKey
     *            The MAC key used to sign or verify SMB.

            entity.setUpdatedBy(username);
            entity.setUpdatedTime(currentTime);
            copyBeanToBean(form, entity, op -> op.exclude(Stream
                    .concat(Stream.of(Constants.COMMON_CONVERSION_RULE), Stream.of(Constants.PERMISSIONS)).toArray(n -> new String[n])));
            final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

                    copyBeanToBean(entity, form, copyOp -> {
                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });

                    copyBeanToBean(entity, form, copyOp -> {
                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });

                    copyBeanToBean(entity, form, copyOp -> {
                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });

                commandThread.interrupt();
            }
            if (systemMonitorTask != null) {
                systemMonitorTask.cancel();
            }
            if (hotThreadMonitorTask != null) {
                hotThreadMonitorTask.cancel();
            }
            destroyContainer();
        }

        if (exitCode != Constants.EXIT_OK) {
            System.exit(exitCode);

            entity.setUpdatedBy(username);
            entity.setUpdatedTime(currentTime);
            BeanUtil.copyBeanToBean(form, entity, op -> op.exclude(
                    Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE), Stream.of(Constants.QUERIES)).toArray(n -> new String[n])));

            resultBuf.append(e.getMessage()).append("\n");
        } finally {
            if (timeoutTask != null && !timeoutTask.isCanceled()) {
                timeoutTask.cancel();
            }
        }

        return resultBuf.toString();

    }

    protected void executeThumbnailGenerator() {
        final List<String> cmdList = new ArrayList<>();

            logger.error("Suggest creator does not work correctly.", t);
            exitCode = Constants.EXIT_FAIL;
        } finally {
            if (systemMonitorTask != null) {
                systemMonitorTask.cancel();
            }
            destroyContainer();
        }

        logger.info("Finished SuggestCreator.");
        System.exit(exitCode);
    }

    private static void destroyContainer() {

            entity.setUpdatedBy(username);
            entity.setUpdatedTime(currentTime);
            BeanUtil.copyBeanToBean(form, entity, op -> op.exclude(Stream
                    .concat(Stream.of(Constants.COMMON_CONVERSION_RULE), Stream.of(Constants.PERMISSIONS)).toArray(n -> new String[n])));
            final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();