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+# Copyright (c) 2018 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Module defining AbstractSearchAlgorithm class."""
+
+from abc import ABCMeta, abstractmethod
+
+
+class AbstractSearchAlgorithm(object):
+ """Abstract class defining common API for search algorithms."""
+
+ __metaclass__ = ABCMeta
+
+ def __init__(self, measurer):
+ """Store the rate provider.
+
+ :param measurer: Object able to perform trial or composite measurements.
+ :type measurer: AbstractMeasurer
+ """
+ # TODO: Type check for AbstractMeasurer?
+ self.measurer = measurer
+
+ @abstractmethod
+ def narrow_down_ndr_and_pdr(
+ self, fail_rate, line_rate, packet_loss_ratio):
+ """Perform measurements to narrow down intervals, return them.
+
+ This will be renamed when custom loss ratio lists are supported.
+
+ :param fail_rate: Minimal target transmit rate [pps].
+ :param line_rate: Maximal target transmit rate [pps].
+ :param packet_loss_ratio: Fraction of packets lost, for PDR [1].
+ :type fail_rate: float
+ :type line_rate: float
+ :type packet_loss_ratio: float
+ :returns: Structure containing narrowed down intervals
+ and their measurements.
+ :rtype: NdrPdrResult
+ """
+ # TODO: Do we agree on arguments related to precision or trial duration?
+ pass