Beispiel #1
0
def create(conditions_json, actions_json, uuid=None,
           description=None, scope=None):
    """Create a new rule in database.

    :param conditions_json: list of dicts with the following keys:
                            * op - operator
                            * field - JSON path to field to compare
                            Other keys are stored as is.
    :param actions_json: list of dicts with the following keys:
                         * action - action type
                         Other keys are stored as is.
    :param uuid: rule UUID, will be generated if empty
    :param description: human-readable rule description
    :param scope: if scope on node and rule matches, rule applies;
                  if its empty, rule applies to all nodes.
    :returns: new IntrospectionRule object
    :raises: utils.Error on failure
    """
    uuid = uuid or uuidutils.generate_uuid()
    LOG.debug('Creating rule %(uuid)s with description "%(descr)s", '
              'conditions %(conditions)s, scope "%(scope)s"'
              ' and actions %(actions)s',
              {'uuid': uuid, 'descr': description, 'scope': scope,
               'conditions': conditions_json, 'actions': actions_json})

    conditions = _validate_conditions(conditions_json)
    actions = _validate_actions(actions_json)

    try:
        with db.ensure_transaction() as session:
            rule = db.Rule(uuid=uuid, description=description, disabled=False,
                           created_at=timeutils.utcnow(), scope=scope)

            for field, op, multiple, invert, params in conditions:
                rule.conditions.append(db.RuleCondition(op=op,
                                                        field=field,
                                                        multiple=multiple,
                                                        invert=invert,
                                                        params=params))

            for action, params in actions:
                rule.actions.append(db.RuleAction(action=action,
                                                  params=params))

            rule.save(session)
    except db_exc.DBDuplicateEntry as exc:
        LOG.error('Database integrity error %s when '
                  'creating a rule', exc)
        raise utils.Error(_('Rule with UUID %s already exists') % uuid,
                          code=409)

    LOG.info('Created rule %(uuid)s with description "%(descr)s" '
             'and scope "%(scope)s"',
             {'uuid': uuid, 'descr': description, 'scope': scope})
    return IntrospectionRule(uuid=uuid,
                             conditions=rule.conditions,
                             actions=rule.actions,
                             description=description,
                             scope=rule.scope)
Beispiel #2
0
def create(conditions_json, actions_json, uuid=None,
           description=None):
    """Create a new rule in database.

    :param conditions_json: list of dicts with the following keys:
                            * op - operator
                            * field - JSON path to field to compare
                            Other keys are stored as is.
    :param actions_json: list of dicts with the following keys:
                         * action - action type
                         Other keys are stored as is.
    :param uuid: rule UUID, will be generated if empty
    :param description: human-readable rule description
    :returns: new IntrospectionRule object
    :raises: utils.Error on failure
    """
    uuid = uuid or uuidutils.generate_uuid()
    LOG.debug('Creating rule %(uuid)s with description "%(descr)s", '
              'conditions %(conditions)s and actions %(actions)s',
              {'uuid': uuid, 'descr': description,
               'conditions': conditions_json, 'actions': actions_json})

    try:
        jsonschema.validate(conditions_json, conditions_schema())
    except jsonschema.ValidationError as exc:
        raise utils.Error(_('Validation failed for conditions: %s') % exc)

    try:
        jsonschema.validate(actions_json, actions_schema())
    except jsonschema.ValidationError as exc:
        raise utils.Error(_('Validation failed for actions: %s') % exc)

    cond_mgr = plugins_base.rule_conditions_manager()
    act_mgr = plugins_base.rule_actions_manager()

    conditions = []
    for cond_json in conditions_json:
        field = cond_json['field']
        try:
            jsonpath.parse(field)
        except Exception as exc:
            raise utils.Error(_('Unable to parse field JSON path %(field)s: '
                                '%(error)s') % {'field': field, 'error': exc})

        plugin = cond_mgr[cond_json['op']].obj
        params = {k: v for k, v in cond_json.items()
                  if k not in ('op', 'field', 'multiple')}
        try:
            plugin.validate(params)
        except ValueError as exc:
            raise utils.Error(_('Invalid parameters for operator %(op)s: '
                                '%(error)s') %
                              {'op': cond_json['op'], 'error': exc})

        conditions.append((cond_json['field'], cond_json['op'],
                           cond_json.get('multiple', 'any'), params))

    actions = []
    for action_json in actions_json:
        plugin = act_mgr[action_json['action']].obj
        params = {k: v for k, v in action_json.items() if k != 'action'}
        try:
            plugin.validate(params)
        except ValueError as exc:
            raise utils.Error(_('Invalid parameters for action %(act)s: '
                                '%(error)s') %
                              {'act': action_json['action'], 'error': exc})

        actions.append((action_json['action'], params))

    try:
        with db.ensure_transaction() as session:
            rule = db.Rule(uuid=uuid, description=description,
                           disabled=False, created_at=timeutils.utcnow())

            for field, op, multiple, params in conditions:
                rule.conditions.append(db.RuleCondition(op=op, field=field,
                                                        multiple=multiple,
                                                        params=params))

            for action, params in actions:
                rule.actions.append(db.RuleAction(action=action,
                                                  params=params))

            rule.save(session)
    except db_exc.DBDuplicateEntry as exc:
        LOG.error(_LE('Database integrity error %s when '
                      'creating a rule'), exc)
        raise utils.Error(_('Rule with UUID %s already exists') % uuid,
                          code=409)

    LOG.info(_LI('Created rule %(uuid)s with description "%(descr)s"'),
             {'uuid': uuid, 'descr': description})
    return IntrospectionRule(uuid=uuid,
                             conditions=rule.conditions,
                             actions=rule.actions,
                             description=description)