E2Manager/handlers/rmrmsghandlers/e2_term_init_notification_handler.go

   1 //
   2 // Copyright 2019 AT&T Intellectual Property
   3 // Copyright 2019 Nokia
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the "License");
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //      http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16
  17 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
  18 //  platform project (RICP).
  19
  20
  21 package rmrmsghandlers
  22
  23 import (
  24         "e2mgr/clients"
  25         "e2mgr/logger"
  26         "e2mgr/managers"
  27         "e2mgr/models"
  28         "encoding/json"
  29         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
  30         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  31 )
  32
  33 type E2TermInitNotificationHandler struct {
  34         logger                  *logger.Logger
  35         ranDisconnectionManager *managers.RanDisconnectionManager
  36         e2tInstancesManager     managers.IE2TInstancesManager
  37         routingManagerClient    clients.IRoutingManagerClient
  38 }
  39
  40 func NewE2TermInitNotificationHandler(logger *logger.Logger, ranDisconnectionManager *managers.RanDisconnectionManager, e2tInstancesManager managers.IE2TInstancesManager, routingManagerClient clients.IRoutingManagerClient) E2TermInitNotificationHandler {
  41         return E2TermInitNotificationHandler{
  42                 logger:                  logger,
  43                 ranDisconnectionManager: ranDisconnectionManager,
  44                 e2tInstancesManager:     e2tInstancesManager,
  45                 routingManagerClient:    routingManagerClient,
  46         }
  47 }
  48
  49 func (h E2TermInitNotificationHandler) Handle(request *models.NotificationRequest) {
  50         unmarshalledPayload := models.E2TermInitPayload{}
  51         err := json.Unmarshal(request.Payload, &unmarshalledPayload)
  52
  53         if err != nil {
  54                 h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Error unmarshaling E2 Term Init payload: %s", err)
  55                 return
  56         }
  57
  58         e2tAddress := unmarshalledPayload.Address
  59
  60         if len(e2tAddress) == 0 {
  61                 h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Empty E2T address received")
  62                 return
  63         }
  64
  65         h.logger.Infof("#E2TermInitNotificationHandler.Handle - E2T address: %s - handling E2_TERM_INIT", e2tAddress)
  66
  67         e2tInstance, err := h.e2tInstancesManager.GetE2TInstance(e2tAddress)
  68
  69         if err != nil {
  70                 _, ok := err.(*common.ResourceNotFoundError)
  71
  72                 if !ok {
  73                         h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Failed retrieving E2TInstance. error: %s", err)
  74                         return
  75                 }
  76
  77                 h.HandleNewE2TInstance(e2tAddress)
  78                 return
  79         }
  80
  81         if len(e2tInstance.AssociatedRanList) == 0 {
  82                 h.logger.Infof("#E2TermInitNotificationHandler.Handle - E2T Address: %s - E2T instance has no associated RANs", e2tInstance.Address)
  83                 return
  84         }
  85
  86         if e2tInstance.State == entities.ToBeDeleted{
  87                 h.logger.Infof("#E2TermInitNotificationHandler.Handle - E2T Address: %s - E2T instance status is: %s, ignore", e2tInstance.Address, e2tInstance.State)
  88                 return
  89         }
  90
  91         h.HandleExistingE2TInstance(e2tInstance)
  92
  93         h.logger.Infof("#E2TermInitNotificationHandler.Handle - Completed handling of E2_TERM_INIT")
  94 }
  95
  96 func (h E2TermInitNotificationHandler) HandleExistingE2TInstance(e2tInstance *entities.E2TInstance) {
  97
  98         for _, ranName := range e2tInstance.AssociatedRanList {
  99
 100                 if err := h.ranDisconnectionManager.DisconnectRan(ranName); err != nil {
 101                         if _, ok := err.(*common.ResourceNotFoundError); !ok{
 102                                 break
 103                         }
 104                 }
 105         }
 106 }
 107
 108 func (h E2TermInitNotificationHandler) HandleNewE2TInstance(e2tAddress string) {
 109
 110         err := h.routingManagerClient.AddE2TInstance(e2tAddress)
 111
 112         if err != nil{
 113                 h.logger.Errorf("#E2TermInitNotificationHandler.HandleNewE2TInstance - e2t address: %s - routing manager failure", e2tAddress)
 114                 return
 115         }
 116
 117         _ = h.e2tInstancesManager.AddE2TInstance(e2tAddress)
 118 }