lcm/ns/views/sol/subscriptions_view.py

   1 # Copyright (c) 2019, CMCC Technologies Co., Ltd.
   2
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 import ast
  16 import json
  17 import logging
  18 import traceback
  19
  20 from drf_yasg.utils import swagger_auto_schema
  21 from lcm.ns.serializers.sol.lccn_subscription import LccnSubscriptionSerializer
  22 from lcm.ns.serializers.sol.lccn_subscription import LccnSubscriptionsSerializer
  23 from rest_framework import status
  24 from rest_framework.response import Response
  25 from rest_framework.views import APIView
  26
  27 from lcm.ns.biz.create_subscription import CreateSubscription
  28 from lcm.ns.biz.query_subscription import QuerySubscription
  29 from lcm.ns.serializers.sol.lccn_subscription_request import LccnSubscriptionRequestSerializer
  30 from lcm.ns.serializers.sol.pub_serializers import ProblemDetailsSerializer
  31 from lcm.pub.exceptions import NSLCMException
  32 from lcm.pub.exceptions import BadRequestException
  33
  34 logger = logging.getLogger(__name__)
  35 VALID_FILTERS = ["operationTypes", "operationStates", "notificationTypes", "nsInstanceId",
  36                  "nsComponentTypes", "lcmOpNameImpactingNsComponent", "lcmOpOccStatusImpactingNsComponent"]
  37
  38
  39 def get_problem_details_serializer(status_code, error_message):
  40     problem_details = {
  41         "status": status_code,
  42         "detail": error_message
  43     }
  44     problem_details_serializer = ProblemDetailsSerializer(data=problem_details)
  45     problem_details_serializer.is_valid()
  46     return problem_details_serializer
  47
  48
  49 class SubscriptionsView(APIView):
  50
  51     @swagger_auto_schema(
  52         request_body=LccnSubscriptionRequestSerializer(),
  53         responses={
  54             status.HTTP_201_CREATED: LccnSubscriptionSerializer(),
  55             status.HTTP_303_SEE_OTHER: ProblemDetailsSerializer(),
  56             status.HTTP_500_INTERNAL_SERVER_ERROR: ProblemDetailsSerializer()
  57         }
  58     )
  59     def post(self, request):
  60         logger.debug("SubscribeNotification--post::> %s" % request.data)
  61         try:
  62             lccn_subscription_request_serializer = LccnSubscriptionRequestSerializer(
  63                 data=request.data)
  64             if not lccn_subscription_request_serializer.is_valid():
  65                 raise BadRequestException(
  66                     lccn_subscription_request_serializer.errors)
  67             subscription = CreateSubscription(
  68                 lccn_subscription_request_serializer.data).do_biz()
  69             lccn_notifications_filter = {
  70                 "notificationTypes": ast.literal_eval(subscription.notification_types),
  71                 "operationTypes": ast.literal_eval(subscription.operation_types),
  72                 "operationStates": ast.literal_eval(subscription.operation_states),
  73                 "nsInstanceSubscriptionFilter": json.loads(subscription.ns_instance_filter),
  74                 "nsComponentTypes": ast.literal_eval(subscription.ns_component_types),
  75                 "lcmOpNameImpactingNsComponent": ast.literal_eval(subscription.
  76                                                                   lcm_opname_impacting_nscomponent),
  77                 "lcmOpOccStatusImpactingNsComponent": ast.literal_eval(subscription.
  78                                                                        lcm_opoccstatus_impacting_nscomponent)
  79             }
  80             subscription_data = {
  81                 "id": subscription.subscription_id,
  82                 "callbackUri": subscription.callback_uri,
  83                 "_links": json.loads(subscription.links),
  84                 "filter": lccn_notifications_filter
  85             }
  86             sub_resp_serializer = LccnSubscriptionSerializer(
  87                 data=subscription_data)
  88             if not sub_resp_serializer.is_valid():
  89                 raise NSLCMException(sub_resp_serializer.errors)
  90             return Response(data=sub_resp_serializer.data, status=status.HTTP_201_CREATED)
  91         except BadRequestException as e:
  92             logger.error("Exception in InstantiateNsView: %s", e.message)
  93             data = {'status': status.HTTP_400_BAD_REQUEST, 'detail': e.message}
  94             return Response(data=data, status=status.HTTP_400_BAD_REQUEST)
  95         except NSLCMException as e:
  96             logger.error(e.message)
  97             if "exists" in e.message:
  98                 data = {'status': status.HTTP_303_SEE_OTHER, 'detail': e.message}
  99                 return Response(data=data, status=status.HTTP_303_SEE_OTHER)
 100             data = {'status': status.HTTP_500_INTERNAL_SERVER_ERROR, 'detail': e.message}
 101             return Response(data=data, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 102         except Exception as e:
 103             logger.error(e.message)
 104             logger.error(traceback.format_exc())
 105             data = {'status': status.HTTP_500_INTERNAL_SERVER_ERROR, 'detail': e.message}
 106             return Response(data=data, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 107
 108     @swagger_auto_schema(
 109         responses={
 110             status.HTTP_200_OK: LccnSubscriptionsSerializer(),
 111             status.HTTP_400_BAD_REQUEST: ProblemDetailsSerializer(),
 112             status.HTTP_500_INTERNAL_SERVER_ERROR: ProblemDetailsSerializer()
 113         }
 114     )
 115     def get(self, request):
 116         logger.debug("SubscribeNotification--get::> %s" % request.query_params)
 117         try:
 118             if request.query_params and not set(request.query_params).issubset(set(VALID_FILTERS)):
 119                 problem_details_serializer = get_problem_details_serializer(
 120                     status.HTTP_400_BAD_REQUEST, "Not a valid filter")
 121                 return Response(data=problem_details_serializer.data, status=status.HTTP_400_BAD_REQUEST)
 122             resp_data = QuerySubscription(request.query_params).query_multi_subscriptions()
 123             subscriptions_serializer = LccnSubscriptionsSerializer(data=resp_data)
 124             if not subscriptions_serializer.is_valid():
 125                 raise NSLCMException(subscriptions_serializer.errors)
 126             logger.debug("SubscribeNotification--get::> Remove default fields if exclude_default is "
 127                          "specified")
 128             return Response(data=subscriptions_serializer.data, status=status.HTTP_200_OK)
 129         except NSLCMException as e:
 130             logger.error(e.message)
 131             problem_details_serializer = get_problem_details_serializer(
 132                 status.HTTP_500_INTERNAL_SERVER_ERROR, traceback.format_exc())
 133             return Response(data=problem_details_serializer.data,
 134                             status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 135         except Exception as e:
 136             logger.error(e.message)
 137             logger.error(traceback.format_exc())
 138             problem_details_serializer = get_problem_details_serializer(
 139                 status.HTTP_500_INTERNAL_SERVER_ERROR, traceback.format_exc())
 140             return Response(data=problem_details_serializer.data,
 141                             status=status.HTTP_500_INTERNAL_SERVER_ERROR)