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# -------------------------------------------------------------------------
# Copyright (C) 2020 Wipro Limited.
#
# 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 for processing response from conductor for slice selection
"""
from osdf.logging.osdf_logging import debug_log
SLICE_PROFILE_FIELDS = ["latency", "max_number_of_ues", "coverage_area_ta_list",
"ue_mobility_level", "resource_sharing_level", "exp_data_rate_ul",
"exp_data_rate_dl", "area_traffic_cap_ul", "area_traffic_cap_dl",
"activity_factor", "e2e_latency", "jitter", "survival_time",
"exp_data_rate", "payload_size", "traffic_density", "conn_density",
"reliability", "service_area_dimension", "cs_availability"]
def conductor_response_processor(overall_recommendations, nst_info_map, request_info):
"""Process conductor response to form the response for the API request
:param overall_recommendations: recommendations from conductor
:param nst_info_map: NST info from the request
:param request_info: request info
:return: response json as a dictionary
"""
shared_nsi_solutions = list()
new_nsi_solutions = list()
for nst_name, recommendations in overall_recommendations.items():
for recommendation in recommendations:
nsi_set = set(values['candidate']['nsi_name'] for key, values in recommendation.items())
if len(nsi_set) == 1:
nsi = nsi_set.pop()
debug_log.debug("The NSSIs in the solution belongs to the same NSI {}".format(nsi))
shared_nsi_solution = dict()
shared_nsi_solution["NSIName"] = nsi
shared_nsi_solutions.append(shared_nsi_solution)
else:
nssi_solutions = get_nssi_solutions(recommendation)
new_nsi_solution = dict()
new_nsi_solution['matchLevel'] = ""
new_nsi_solution['NSTInfo'] = nst_info_map.get(nst_name)
new_nsi_solution['NSSISolutions'] = nssi_solutions
new_nsi_solutions.append(new_nsi_solution)
solutions = dict()
solutions['sharedNSISolutions'] = shared_nsi_solutions
solutions['newNSISolutions'] = new_nsi_solutions
return get_nsi_selection_response(request_info, solutions)
def conductor_error_response_processor(request_info, error_message):
"""Form response message from the error message
:param request_info: request info
:param error_message: error message while processing the request
:return: response json as dictionary
"""
return {'requestId': request_info['requestId'],
'transactionId': request_info['transactionId'],
'requestStatus': 'error',
'statusMessage': error_message}
def get_nssi_solutions(recommendation):
"""Get nssi solutions from recommendation
:param recommendation: recommendation from conductor
:return: new nssi solutions list
"""
nssi_solutions = list()
for nsst_name, nsst_rec in recommendation.items():
candidate = nsst_rec['candidate']
nssi_info, slice_profile = get_solution_from_candidate(candidate)
nsst_info = {"NSSTName": nsst_name}
nssi_solution = {"sliceProfile": slice_profile,
"NSSTInfo": nsst_info,
"NSSISolution": nssi_info}
nssi_solutions.append(nssi_solution)
return nssi_solutions
def get_solution_from_candidate(candidate):
"""Get nssi info from candidate
:param candidate: Candidate from the recommendation
:return: nssi_info and slice profile derived from candidate
"""
slice_profile = dict()
nssi_info = {"NSSIName": candidate['instance_name'],
"NSSIId": candidate['candidate_id']}
for field in SLICE_PROFILE_FIELDS:
if candidate[field]:
slice_profile[field] = candidate[field]
return nssi_info, slice_profile
def get_nsi_selection_response(request_info, solutions):
"""Get NSI selection response from final solution
:param request_info: request info
:param solutions: final solutions
:return: NSI selection response to send back as dictionary
"""
return {'requestId': request_info['requestId'],
'transactionId': request_info['transactionId'],
'requestStatus': 'completed',
'statusMessage': '',
'solutions': solutions}
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