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2 # Copyright (C) 2020 Wipro Limited.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
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12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 # -------------------------------------------------------------------------
20 Module for processing response from conductor for slice selection
23 from osdf.logging.osdf_logging import debug_log
26 SLICE_PROFILE_FIELDS = ["latency", "max_number_of_ues", "coverage_area_ta_list",
27 "ue_mobility_level", "resource_sharing_level", "exp_data_rate_ul",
28 "exp_data_rate_dl", "area_traffic_cap_ul", "area_traffic_cap_dl",
29 "activity_factor", "e2e_latency", "jitter", "survival_time",
30 "exp_data_rate", "payload_size", "traffic_density", "conn_density",
31 "reliability", "service_area_dimension", "cs_availability"]
34 def conductor_response_processor(overall_recommendations, nst_info_map, request_info):
35 """Process conductor response to form the response for the API request
36 :param overall_recommendations: recommendations from conductor
37 :param nst_info_map: NST info from the request
38 :param request_info: request info
39 :return: response json as a dictionary
41 shared_nsi_solutions = list()
42 new_nsi_solutions = list()
44 for nst_name, recommendations in overall_recommendations.items():
45 for recommendation in recommendations:
46 nsi_set = set(values['candidate']['nsi_name'] for key, values in recommendation.items())
49 debug_log.debug("The NSSIs in the solution belongs to the same NSI {}".format(nsi))
50 shared_nsi_solution = dict()
51 shared_nsi_solution["NSIName"] = nsi
52 shared_nsi_solutions.append(shared_nsi_solution)
54 nssi_solutions = get_nssi_solutions(recommendation)
55 new_nsi_solution = dict()
56 new_nsi_solution['matchLevel'] = ""
57 new_nsi_solution['NSTInfo'] = nst_info_map.get(nst_name)
58 new_nsi_solution['NSSISolutions'] = nssi_solutions
59 new_nsi_solutions.append(new_nsi_solution)
62 solutions['sharedNSISolutions'] = shared_nsi_solutions
63 solutions['newNSISolutions'] = new_nsi_solutions
64 return get_nsi_selection_response(request_info, solutions)
67 def conductor_error_response_processor(request_info, error_message):
68 """Form response message from the error message
69 :param request_info: request info
70 :param error_message: error message while processing the request
71 :return: response json as dictionary
73 return {'requestId': request_info['requestId'],
74 'transactionId': request_info['transactionId'],
75 'requestStatus': 'error',
76 'statusMessage': error_message}
79 def get_nssi_solutions(recommendation):
80 """Get nssi solutions from recommendation
81 :param recommendation: recommendation from conductor
82 :return: new nssi solutions list
84 nssi_solutions = list()
86 for nsst_name, nsst_rec in recommendation.items():
87 candidate = nsst_rec['candidate']
88 nssi_info, slice_profile = get_solution_from_candidate(candidate)
89 nsst_info = {"NSSTName": nsst_name}
90 nssi_solution = {"sliceProfile": slice_profile,
91 "NSSTInfo": nsst_info,
92 "NSSISolution": nssi_info}
93 nssi_solutions.append(nssi_solution)
97 def get_solution_from_candidate(candidate):
98 """Get nssi info from candidate
99 :param candidate: Candidate from the recommendation
100 :return: nssi_info and slice profile derived from candidate
102 slice_profile = dict()
103 nssi_info = {"NSSIName": candidate['instance_name'],
104 "NSSIId": candidate['candidate_id']}
106 for field in SLICE_PROFILE_FIELDS:
108 slice_profile[field] = candidate[field]
110 return nssi_info, slice_profile
113 def get_nsi_selection_response(request_info, solutions):
114 """Get NSI selection response from final solution
115 :param request_info: request info
116 :param solutions: final solutions
117 :return: NSI selection response to send back as dictionary
119 return {'requestId': request_info['requestId'],
120 'transactionId': request_info['transactionId'],
121 'requestStatus': 'completed',
123 'solutions': solutions}