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# -------------------------------------------------------------------------
# Copyright (c) 2020 Huawei Intellectual Property
#
# 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.
#
# -------------------------------------------------------------------------
"""
This application generates NST SELECTION API calls using the information received from SO
"""
import json
import os
from osdf.logging.osdf_logging import error_log
from osdf.utils.interfaces import get_rest_client
from requests import RequestException
from threading import Thread
import traceback
BASE_DIR = os.path.dirname(__file__)
# This is the class for NST Selection
class NstSelection(Thread):
def __init__(self, osdf_config, request_json):
super().__init__()
self.osdf_config = osdf_config
self.request_json = request_json
self.request_info = self.request_json['requestInfo']
def run(self):
self.process_nst_selection()
def process_nst_selection(self):
"""Process a PCI request from a Client (build config-db, policy and API call, make the call, return result)
:param req_object: Request parameters from the client
:param osdf_config: Configuration specific to OSDF application (core + deployment)
:return: response from NST Opt
"""
try:
rest_client = get_rest_client(self.request_json, service='so')
solution = self.get_nst_solution()
solution = self.get_nst_selection_response(solution)
except Exception as err:
error_log.error("Error for {} {}".format(self.request_info.get('requestId'),
traceback.format_exc()))
error_message = str(err)
solution = self.error_response(error_message)
try:
rest_client.request(json=solution, noresponse=True)
except RequestException:
error_log.error("Error sending asynchronous notification for {} {}".
format(self.request_info['requestId'], traceback.format_exc()))
def get_nst_solution(self):
"""the file is in the same folder for now will move it to the conf folder of the has once its
integrated there...
"""
config_input_json = os.path.join(BASE_DIR, 'conf/configIinputs.json')
with open(config_input_json, 'r') as openfile:
service_profile = self.request_json["serviceProfile"]
nst_solution_list = []
resource_name = "NST"
nst_object = json.load(openfile)
for nst in nst_object[resource_name]:
[(nst_name, nst_list)] = nst.items()
individual_nst = dict()
matchall = False
for constraint_name in service_profile:
constraint_value = nst_list.get(constraint_name)
if not constraint_value:
matchall = False
break
else:
matchall = True
if matchall:
individual_nst["NSTName"] = nst_list.get("name")
individual_nst["UUID"] = nst_list.get("modeluuid")
individual_nst["invariantUUID"] = nst_list.get("modelinvariantuuid")
individual_nst["individual_nst"] = 1
nst_solution_list.append(individual_nst)
return nst_solution_list
def get_nst_selection_response(self, solutions):
"""Get NST selection response from final solution
:param solutions: final solutions
:return: NST selection response to send back as dictionary
"""
return {'requestId': self.request_info['requestId'],
'transactionId': self.request_info['transactionId'],
'requestStatus': 'completed',
'statusMessage': '',
'solutions': solutions}
def error_response(self, error_message):
"""Form response message from the error message
:param error_message: error message while processing the request
:return: response json as dictionary
"""
return {'requestId': self.request_info['requestId'],
'transactionId': self.request_info['transactionId'],
'requestStatus': 'error',
'statusMessage': error_message}
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