def on_get(self, req, res): helpers.validate_authorization(req, self._get_metrics_authorized_roles) tenant_id = ( helpers.get_x_tenant_or_tenant_id(req, self._delegate_authorized_roles)) name = helpers.get_query_name(req, True) helpers.validate_query_name(name) dimensions = helpers.get_query_dimensions(req) helpers.validate_query_dimensions(dimensions) start_timestamp = helpers.get_query_starttime_timestamp(req) end_timestamp = helpers.get_query_endtime_timestamp(req, False) helpers.validate_start_end_timestamps(start_timestamp, end_timestamp) statistics = helpers.get_query_statistics(req) period = helpers.get_query_period(req) offset = helpers.get_query_param(req, 'offset') merge_metrics_flag = get_merge_metrics_flag(req) group_by = helpers.get_query_group_by(req) result = self._metric_statistics(tenant_id, name, dimensions, start_timestamp, end_timestamp, statistics, period, req.uri, offset, req.limit, merge_metrics_flag, group_by) res.body = helpers.dumpit_utf8(result) res.status = falcon.HTTP_200