+++ /dev/null
-# 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.
-
-"""wrk traffic profile parser.
-
-See LLD for the structure of a wrk traffic profile.
-"""
-
-
-from os.path import isfile
-from pprint import pformat
-
-from yaml import load, YAMLError
-from robot.api import logger
-
-from resources.tools.wrk.wrk_errors import WrkError
-
-
-class WrkTrafficProfile(object):
- """The wrk traffic profile.
- """
-
- MANDATORY_PARAMS = ("urls",
- "first-cpu",
- "cpus",
- "duration",
- "nr-of-threads",
- "nr-of-connections")
-
- INTEGER_PARAMS = (("cpus", 1),
- ("first-cpu", 0),
- ("duration", 1),
- ("nr-of-threads", 1),
- ("nr-of-connections", 1))
-
- def __init__(self, profile_name):
- """Read the traffic profile from the yaml file.
-
- :param profile_name: Path to the yaml file with the profile.
- :type profile_name: str
- :raises: WrkError if it is not possible to parse the profile.
- """
-
- self._profile_name = None
- self._traffic_profile = None
-
- self.profile_name = profile_name
-
- try:
- with open(self.profile_name, 'r') as profile_file:
- self.traffic_profile = load(profile_file)
- except IOError as err:
- raise WrkError(msg="An error occurred while opening the file '{0}'."
- .format(self.profile_name),
- details=str(err))
- except YAMLError as err:
- raise WrkError(msg="An error occurred while parsing the traffic "
- "profile '{0}'.".format(self.profile_name),
- details=str(err))
-
- self._validate_traffic_profile()
-
- if self.traffic_profile:
- logger.debug("\nThe wrk traffic profile '{0}' is valid.\n".
- format(self.profile_name))
- logger.debug("wrk traffic profile '{0}':".format(self.profile_name))
- logger.debug(pformat(self.traffic_profile))
- else:
- logger.debug("\nThe wrk traffic profile '{0}' is invalid.\n".
- format(self.profile_name))
- raise WrkError("\nThe wrk traffic profile '{0}' is invalid.\n".
- format(self.profile_name))
-
- def __repr__(self):
- return pformat(self.traffic_profile)
-
- def __str__(self):
- return pformat(self.traffic_profile)
-
- def _validate_traffic_profile(self):
- """Validate the traffic profile.
-
- The specification, the structure and the rules are described in
- doc/wrk_lld.rst
- """
-
- logger.debug("\nValidating the wrk traffic profile '{0}'...\n".
- format(self.profile_name))
- if not (self._validate_mandatory_structure()
- and self._validate_mandatory_values()
- and self._validate_optional_values()
- and self._validate_dependencies()):
- self.traffic_profile = None
-
- def _validate_mandatory_structure(self):
- """Validate presence of mandatory parameters in trafic profile dict
-
- :returns: whether mandatory structure is followed by the profile
- :rtype: bool
- """
- # Level 1: Check if the profile is a dictionary:
- if not isinstance(self.traffic_profile, dict):
- logger.error("The wrk traffic profile must be a dictionary.")
- return False
-
- # Level 2: Check if all mandatory parameters are present:
- is_valid = True
- for param in self.MANDATORY_PARAMS:
- if self.traffic_profile.get(param, None) is None:
- logger.error("The parameter '{0}' in mandatory.".format(param))
- is_valid = False
- return is_valid
-
- def _validate_mandatory_values(self):
- """Validate that mandatory profile values satisfy their constraints
-
- :returns: whether mandatory values are acceptable
- :rtype: bool
- """
- # Level 3: Mandatory params: Check if urls is a list:
- is_valid = True
- if not isinstance(self.traffic_profile["urls"], list):
- logger.error("The parameter 'urls' must be a list.")
- is_valid = False
-
- # Level 3: Mandatory params: Check if integers are not below minimum
- for param, minimum in self.INTEGER_PARAMS:
- if not self._validate_int_param(param, minimum):
- is_valid = False
- return is_valid
-
- def _validate_optional_values(self):
- """Validate values for optional parameters, if present
-
- :returns: whether present optional values are acceptable
- :rtype: bool
- """
- is_valid = True
- # Level 4: Optional params: Check if script is present:
- script = self.traffic_profile.get("script", None)
- if script is not None:
- if not isinstance(script, str):
- logger.error("The path to LuaJIT script in invalid")
- is_valid = False
- else:
- if not isfile(script):
- logger.error("The file '{0}' does not exist.".
- format(script))
- is_valid = False
- else:
- self.traffic_profile["script"] = None
- logger.debug("The optional parameter 'LuaJIT script' is not "
- "defined. No problem.")
-
- # Level 4: Optional params: Check if header is present:
- header = self.traffic_profile.get("header", None)
- if header is not None:
- if isinstance(header, dict):
- header = ", ".join("{0}: {1}".format(*item)
- for item in header.items())
- self.traffic_profile["header"] = header
- elif not isinstance(header, str):
- logger.error("The parameter 'header' type is not valid.")
- is_valid = False
-
- if not header:
- logger.error("The parameter 'header' is defined but "
- "empty.")
- is_valid = False
- else:
- self.traffic_profile["header"] = None
- logger.debug("The optional parameter 'header' is not defined. "
- "No problem.")
-
- # Level 4: Optional params: Check if latency is present:
- latency = self.traffic_profile.get("latency", None)
- if latency is not None:
- if not isinstance(latency, bool):
- logger.error("The parameter 'latency' must be boolean.")
- is_valid = False
- else:
- self.traffic_profile["latency"] = False
- logger.debug("The optional parameter 'latency' is not defined. "
- "No problem.")
-
- # Level 4: Optional params: Check if timeout is present:
- if 'timeout' in self.traffic_profile:
- if not self._validate_int_param('timeout', 1):
- is_valid = False
- else:
- self.traffic_profile["timeout"] = None
- logger.debug("The optional parameter 'timeout' is not defined. "
- "No problem.")
-
- return is_valid
-
- def _validate_dependencies(self):
- """Validate dependencies between parameters
-
- :returns: whether dependencies between parameters are acceptable
- :rtype: bool
- """
- # Level 5: Check urls and cpus:
- if self.traffic_profile["cpus"] % len(self.traffic_profile["urls"]):
- logger.error("The number of CPUs must be a multiple of the "
- "number of URLs.")
- return False
- return True
-
- def _validate_int_param(self, param, minimum):
- """Validate that an int parameter is set acceptably
- If it is not an int already but a string, convert and store it as int.
-
- :param param: Name of a traffic profile parameter
- :param minimum: The minimum value for the named parameter
- :type param: str
- :type minimum: int
- :returns: whether param is set to an int of at least minimum value
- :rtype: bool
- """
- value = self._traffic_profile[param]
- if isinstance(value, (str, unicode)):
- if value.isdigit():
- value = int(value)
- else:
- value = minimum - 1
- if isinstance(value, int) and value >= minimum:
- self.traffic_profile[param] = value
- return True
- logger.error("The parameter '{param}' must be an integer and "
- "at least {minimum}".format(param=param, minimum=minimum))
- return False
-
- @property
- def profile_name(self):
- """Getter - Profile name.
-
- :returns: The traffic profile file path
- :rtype: str
- """
- return self._profile_name
-
- @profile_name.setter
- def profile_name(self, profile_name):
- """
-
- :param profile_name:
- :type profile_name: str
- """
- self._profile_name = profile_name
-
- @property
- def traffic_profile(self):
- """Getter: Traffic profile.
-
- :returns: The traffic profile.
- :rtype: dict
- """
- return self._traffic_profile
-
- @traffic_profile.setter
- def traffic_profile(self, profile):
- """Setter - Traffic profile.
-
- :param profile: The new traffic profile.
- :type profile: dict
- """
- self._traffic_profile = profile
Code Review / csit.git / blobdiff