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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 slice selection request
"""
import json
import traceback
from requests import RequestException
from apps.slice_selection.optimizers.conductor.response_processor \
import conductor_response_processor, conductor_error_response_processor, solution_with_only_slice_profile, get_nsi_selection_response
from osdf.adapters.conductor import conductor
from osdf.adapters.policy.interface import get_policies
from osdf.adapters.policy.utils import group_policies_gen
from osdf.logging.osdf_logging import error_log, debug_log
from osdf.utils.mdc_utils import mdc_from_json
def process_nsi_selection_opt(request_json, osdf_config):
"""Process the nsi selection request from API layer
:param request_json: api request
:param policies: flattened policies corresponding to this request
:param osdf_config: configuration specific to OSDF app
:return: response as a dictionary
"""
req_info = request_json['requestInfo']
try:
mdc_from_json(request_json)
overall_recommendations = dict()
nst_info_map = dict()
new_nsi_solutions = list()
for nst_info in request_json["NSTInfoList"]:
nst_name = nst_info["modelName"]
nst_info_map[nst_name] = {"NSTName": nst_name,
"UUID": nst_info["modelVersionId"],
"invariantUUID": nst_info["modelInvariantId"]}
if request_json["serviceProfile"]["resourceSharingLevel"] == "non-shared":
new_nsi_solution = solution_with_only_slice_profile(request_json['serviceProfile'], nst_info_map.get(nst_name))
new_nsi_solutions.append(new_nsi_solution)
else:
policy_request_json = request_json.copy()
policy_request_json['serviceInfo']['serviceName'] = nst_name
policies = get_policies(policy_request_json, "slice_selection")
demands = get_slice_demands(nst_name, policies, osdf_config.core)
request_parameters = request_json.get('serviceProfile',{})
service_info = {}
req_info['numSolutions'] = 'all'
try:
resp = conductor.request(req_info, demands, request_parameters, service_info, False,
osdf_config, policies)
except RequestException as e:
resp = e.response.json()
error = resp['plans'][0]['message']
error_log.error('Error from conductor {}'.format(error))
debug_log.debug("Response from conductor {}".format(str(resp)))
overall_recommendations[nst_name] = resp["plans"][0].get("recommendations")
if request_json["serviceProfile"]["resourceSharingLevel"] == "non-shared":
solutions = dict()
solutions['newNSISolutions'] = new_nsi_solutions
solutions['sharedNSISolutions'] = []
return get_nsi_selection_response(req_info, solutions)
else:
return conductor_response_processor(overall_recommendations, nst_info_map, req_info, request_json["serviceProfile"])
except Exception as ex:
error_log.error("Error for {} {}".format(req_info.get('requestId'),
traceback.format_exc()))
error_message = str(ex)
return conductor_error_response_processor(req_info, error_message)
def get_slice_demands(model_name, policies, config):
"""
:param model_name: model name of the slice
:param policies: flattened polcies corresponding to the request
:param config: configuration specific to OSDF app
:return: list of demands for the request
"""
group_policies = group_policies_gen(policies, config)
subscriber_policy_list = group_policies["onap.policies.optimization.service.SubscriberPolicy"]
slice_demands = list()
for subscriber_policy in subscriber_policy_list:
policy_properties = subscriber_policy[list(subscriber_policy.keys())[0]]['properties']
if model_name in policy_properties["services"]:
for subnet in policy_properties["properties"]["subscriberName"]:
slice_demand = dict()
slice_demand["resourceModuleName"] = subnet
slice_demand['resourceModelInfo'] = {}
slice_demands.append(slice_demand)
return slice_demands
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