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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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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_id'] for key, values in recommendation.items())
48 nsi_id = nsi_set.pop()
49 candidate = list(recommendation.values())[0]['candidate']
50 debug_log.debug("The NSSIs in the solution belongs to the same NSI {}"
52 shared_nsi_solution = dict()
53 shared_nsi_solution["NSIId"] = nsi_id
54 shared_nsi_solution["NSIName"] = candidate.get('nsi_name')
55 shared_nsi_solution["UUID"] = candidate.get('nsi_model_version_id')
56 shared_nsi_solution["invariantUUID"] = candidate.get('nsi_model_invariant_id')
57 shared_nsi_solutions.append(shared_nsi_solution)
59 nssi_solutions = get_nssi_solutions(recommendation)
60 new_nsi_solution = dict()
61 new_nsi_solution['matchLevel'] = ""
62 new_nsi_solution['NSTInfo'] = nst_info_map.get(nst_name)
63 new_nsi_solution['NSSISolutions'] = nssi_solutions
64 new_nsi_solutions.append(new_nsi_solution)
67 solutions['sharedNSISolutions'] = shared_nsi_solutions
68 solutions['newNSISolutions'] = new_nsi_solutions
69 return get_nsi_selection_response(request_info, solutions)
72 def conductor_error_response_processor(request_info, error_message):
73 """Form response message from the error message
74 :param request_info: request info
75 :param error_message: error message while processing the request
76 :return: response json as dictionary
78 return {'requestId': request_info['requestId'],
79 'transactionId': request_info['transactionId'],
80 'requestStatus': 'error',
81 'statusMessage': error_message}
84 def get_nssi_solutions(recommendation):
85 """Get nssi solutions from recommendation
86 :param recommendation: recommendation from conductor
87 :return: new nssi solutions list
89 nssi_solutions = list()
91 for nsst_name, nsst_rec in recommendation.items():
92 candidate = nsst_rec['candidate']
93 nssi_info, slice_profile = get_solution_from_candidate(candidate)
94 nsst_info = {"NSSTName": nsst_name}
95 nssi_solution = {"sliceProfile": slice_profile,
96 "NSSTInfo": nsst_info,
97 "NSSISolution": nssi_info}
98 nssi_solutions.append(nssi_solution)
102 def get_solution_from_candidate(candidate):
103 """Get nssi info from candidate
104 :param candidate: Candidate from the recommendation
105 :return: nssi_info and slice profile derived from candidate
107 slice_profile = dict()
108 nssi_info = {"NSSIName": candidate['instance_name'],
109 "NSSIId": candidate['candidate_id']}
111 for field in SLICE_PROFILE_FIELDS:
113 slice_profile[field] = candidate[field]
115 return nssi_info, slice_profile
118 def get_nsi_selection_response(request_info, solutions):
119 """Get NSI selection response from final solution
120 :param request_info: request info
121 :param solutions: final solutions
122 :return: NSI selection response to send back as dictionary
124 return {'requestId': request_info['requestId'],
125 'transactionId': request_info['transactionId'],
126 'requestStatus': 'completed',
128 'solutions': solutions}