apps/pci/optimizers/pci_opt_processor.py

   1 # -------------------------------------------------------------------------
   2 #   Copyright (c) 2018 AT&T Intellectual Property
   3 #
   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
   7 #
   8 #       http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 #   Unless required by applicable law or agreed to in writing, software
  11 #   distributed under the License is distributed on an "AS IS" BASIS,
  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.
  15 #
  16 # -------------------------------------------------------------------------
  17 #
  18
  19 import traceback
  20
  21 from onaplogging.mdcContext import MDC
  22 from requests import RequestException
  23
  24 from apps.pci.optimizers.config_request import request as config_request
  25 from apps.pci.optimizers.solver.optimizer import pci_optimize as optimize
  26 from apps.pci.optimizers.solver.pci_utils import get_cell_id
  27 from apps.pci.optimizers.solver.pci_utils import get_pci_value
  28 from osdf.logging.osdf_logging import error_log
  29 from osdf.logging.osdf_logging import metrics_log
  30 from osdf.logging.osdf_logging import MH
  31 from osdf.operation.error_handling import build_json_error_body
  32 from osdf.utils.interfaces import get_rest_client
  33 from osdf.utils.mdc_utils import mdc_from_json
  34
  35 """
  36 This application generates PCI Optimization API calls using the information received from PCI-Handler-MS, SDN-C
  37 and Policy.
  38 """
  39
  40
  41 def process_pci_optimation(request_json, osdf_config, flat_policies):
  42     """Process a PCI request from a Client (build config-db, policy and  API call, make the call, return result)
  43
  44     :param req_object: Request parameters from the client
  45     :param osdf_config: Configuration specific to OSDF application (core + deployment)
  46     :param flat_policies: policies related to pci (fetched based on request)
  47     :return: response from PCI Opt
  48     """
  49     try:
  50         mdc_from_json(request_json)
  51         rc = get_rest_client(request_json, service="pcih")
  52         req_id = request_json["requestInfo"]["requestId"]
  53         cell_info_list, network_cell_info = config_request(request_json, osdf_config, flat_policies)
  54         pci_response = get_solutions(cell_info_list, network_cell_info, request_json)
  55
  56         metrics_log.info(MH.inside_worker_thread(req_id))
  57     except Exception as err:
  58         error_log.error("Error for {} {}".format(req_id, traceback.format_exc()))
  59
  60         try:
  61             body = build_json_error_body(err)
  62             metrics_log.info(MH.sending_response(req_id, "ERROR"))
  63             rc.request(json=body, noresponse=True)
  64         except RequestException:
  65             MDC.put('requestID', req_id)
  66             error_log.error("Error sending asynchronous notification for {} {}".format(req_id, traceback.format_exc()))
  67         raise err
  68
  69     try:
  70         metrics_log.info(MH.calling_back_with_body(req_id, rc.url, pci_response))
  71         error_log.error("pci response: {}".format(str(pci_response)))
  72         rc.request(json=pci_response, noresponse=True)
  73     except RequestException:  # can't do much here but log it and move on
  74         error_log.error("Error sending asynchronous notification for {} {}".format(req_id, traceback.format_exc()))
  75
  76
  77 def get_solutions(cell_info_list, network_cell_info, request_json):
  78     status, pci_solutions, anr_solutions = build_solution_list(cell_info_list, network_cell_info, request_json)
  79     return {
  80         "transactionId": request_json['requestInfo']['transactionId'],
  81         "requestId": request_json["requestInfo"]["requestId"],
  82         "requestStatus": "completed",
  83         "statusMessage": status,
  84         "solutions": {
  85             'networkId': request_json['cellInfo']['networkId'],
  86             'pciSolutions': pci_solutions,
  87             'anrSolutions': anr_solutions
  88         }
  89     }
  90
  91
  92 def build_solution_list(cell_info_list, network_cell_info, request_json):
  93     status = "success"
  94     req_id = request_json["requestInfo"]["requestId"]
  95     pci_solutions = []
  96     anr_solutions = []
  97     try:
  98         opt_solution = optimize(network_cell_info, cell_info_list, request_json)
  99         if opt_solution == 'UNSATISFIABLE':
 100             status = 'inconsistent input'
 101             return status, pci_solutions, anr_solutions
 102         else:
 103             pci_solutions = build_pci_solution(network_cell_info, opt_solution['pci'])
 104             anr_solutions = build_anr_solution(network_cell_info, opt_solution.get('removables', {}))
 105     except RuntimeError:
 106         error_log.error("Failed finding solution for {} {}".format(req_id, traceback.format_exc()))
 107         status = "failed"
 108     return status, pci_solutions, anr_solutions
 109
 110
 111 def build_pci_solution(network_cell_info, pci_solution):
 112     pci_solutions = []
 113     for k, v in pci_solution.items():
 114         old_pci = get_pci_value(network_cell_info, k)
 115         if old_pci != v:
 116             response = {
 117                 'cellId': get_cell_id(network_cell_info, k),
 118                 'pci': v
 119             }
 120             pci_solutions.append(response)
 121     return pci_solutions
 122
 123
 124 def build_anr_solution(network_cell_info, removables):
 125     anr_solutions = []
 126     for k, v in removables.items():
 127         response = {
 128             'cellId': get_cell_id(network_cell_info, k),
 129             'removeableNeighbors': list(map(lambda x: get_cell_id(network_cell_info, x), v))
 130         }
 131         anr_solutions.append(response)
 132     return anr_solutions