JAVA_HOME("java.home"),

  /** Java Virtual Machine specification version. */
  JAVA_VM_SPECIFICATION_VERSION("java.vm.specification.version"),

  /** Java Virtual Machine specification vendor. */
  JAVA_VM_SPECIFICATION_VENDOR("java.vm.specification.vendor"),

  /** Java Virtual Machine specification name. */
  JAVA_VM_SPECIFICATION_NAME("java.vm.specification.name"),

  /** Java Virtual Machine implementation version. */

                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });
                    final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });
                    final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

        roleTypeList.add("admin");
        dataMap.put("role", roleTypeList);
        final List<String> virtualHostList = new ArrayList<String>();
        virtualHostList.add("site1");
        dataMap.put("virtual_host", virtualHostList);

        assertEquals(
                "87e7e4a2d5e2e24147ffd8820b70877a4cee15abdd48f7702e8233f0d17d7369f6d861124f106b541e6652a3e7a94cd51a332a2500fd065de6920559458cd3de",

                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });
                    final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

  JAVA_HOME("java.home"),

  /** Java Virtual Machine specification version. */
  JAVA_VM_SPECIFICATION_VERSION("java.vm.specification.version"),

  /** Java Virtual Machine specification vendor. */
  JAVA_VM_SPECIFICATION_VENDOR("java.vm.specification.vendor"),

  /** Java Virtual Machine specification name. */
  JAVA_VM_SPECIFICATION_NAME("java.vm.specification.name"),

  /** Java Virtual Machine implementation version. */

        return LaRequestUtil.getOptionalRequest().map(req -> (String) req.getAttribute(FessConfig.VIRTUAL_HOST_VALUE)).orElseGet(() -> {
            final String value = processVirtualHost(s -> s, StringUtil.EMPTY);
            LaRequestUtil.getOptionalRequest().ifPresent(req -> req.setAttribute(FessConfig.VIRTUAL_HOST_VALUE, value));
            return value;
        });
    }

    }

    default void setVirtualHostValue(final String value) {
        setSystemProperty(Constants.VIRTUAL_HOST_VALUE_PROPERTY, value);
        propMap.remove(VIRTUAL_HOST_HEADERS);
    }

    default String getVirtualHostValue() {
        return getSystemProperty(Constants.VIRTUAL_HOST_VALUE_PROPERTY, getVirtualHostHeaders());
    }

    default void setLoginRequired(final boolean value) {

    public static final String DEFAULT_LABEL_VALUE_PROPERTY = "label.value";

    public static final String DEFAULT_SORT_VALUE_PROPERTY = "sort.value";

    public static final String VIRTUAL_HOST_VALUE_PROPERTY = "virtual.host.value";

    public static final String LOGIN_REQUIRED_PROPERTY = "login.required";

    public static final String RESULT_COLLAPSED_PROPERTY = "result.collapsed";

        append(buf, "percent", () -> processProbe.getProcessCpuPercent()).append(',');
        append(buf, "total", () -> processProbe.getProcessCpuTotalTime());
        buf.append("},");
        buf.append("\"virtual_memory\":{");
        append(buf, "total", () -> processProbe.getTotalVirtualMemorySize());
        buf.append('}');
        buf.append("},");
    }

    private void appendOsStats(final StringBuilder buf) {