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 package rmrmsghandlers
  21
  22 import (
  23         "e2mgr/clients"
  24         "e2mgr/logger"
  25         "e2mgr/managers"
  26         "e2mgr/models"
  27         "encoding/json"
  28         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
  29         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  30 )
  31
  32 type E2TermInitNotificationHandler struct {
  33         logger                  *logger.Logger
  34         ranDisconnectionManager *managers.RanDisconnectionManager
  35         e2tInstancesManager     managers.IE2TInstancesManager
  36         routingManagerClient    clients.IRoutingManagerClient
  37 }
  38
  39 func NewE2TermInitNotificationHandler(logger *logger.Logger, ranDisconnectionManager *managers.RanDisconnectionManager, e2tInstancesManager managers.IE2TInstancesManager, routingManagerClient clients.IRoutingManagerClient) E2TermInitNotificationHandler {
  40         return E2TermInitNotificationHandler{
  41                 logger:                  logger,
  42                 ranDisconnectionManager: ranDisconnectionManager,
  43                 e2tInstancesManager:     e2tInstancesManager,
  44                 routingManagerClient:    routingManagerClient,
  45         }
  46 }
  47
  48 func (h E2TermInitNotificationHandler) Handle(request *models.NotificationRequest) {
  49         unmarshalledPayload := models.E2TermInitPayload{}
  50         err := json.Unmarshal(request.Payload, &unmarshalledPayload)
  51
  52         if err != nil {
  53                 h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Error unmarshaling E2 Term Init payload: %s", err)
  54                 return
  55         }
  56
  57         e2tAddress := unmarshalledPayload.Address
  58
  59         if len(e2tAddress) == 0 {
  60                 h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Empty E2T address received")
  61                 return
  62         }
  63
  64         h.logger.Infof("#E2TermInitNotificationHandler.Handle - E2T payload: %s - handling E2_TERM_INIT", unmarshalledPayload)
  65
  66         e2tInstance, err := h.e2tInstancesManager.GetE2TInstance(e2tAddress)
  67
  68         if err != nil {
  69                 _, ok := err.(*common.ResourceNotFoundError)
  70
  71                 if !ok {
  72                         h.logger.Errorf("#E2TermInitNotificationHandler.Handle - Failed retrieving E2TInstance. error: %s", err)
  73                         return
  74                 }
  75
  76                 h.HandleNewE2TInstance(e2tAddress, unmarshalledPayload.PodName)
  77                 return
  78         }
  79
  80         if len(e2tInstance.AssociatedRanList) == 0 {
  81                 h.logger.Infof("#E2TermInitNotificationHandler.Handle - E2T Address: %s - E2T instance has no associated RANs", e2tInstance.Address)
  82                 return
  83         }
  84
  85         if e2tInstance.State == entities.ToBeDeleted {
  86                 h.logger.Infof("#E2TermInitNotificationHandler.Handle - E2T Address: %s - E2T instance status is: %s, ignore", e2tInstance.Address, e2tInstance.State)
  87                 return
  88         }
  89
  90         h.HandleExistingE2TInstance(e2tInstance)
  91
  92         h.logger.Infof("#E2TermInitNotificationHandler.Handle - Completed handling of E2_TERM_INIT")
  93 }
  94
  95 func (h E2TermInitNotificationHandler) HandleExistingE2TInstance(e2tInstance *entities.E2TInstance) {
  96
  97         for _, ranName := range e2tInstance.AssociatedRanList {
  98
  99                 if err := h.ranDisconnectionManager.DisconnectRan(ranName); err != nil {
 100                         if _, ok := err.(*common.ResourceNotFoundError); !ok {
 101                                 break
 102                         }
 103                 }
 104         }
 105 }
 106
 107 func (h E2TermInitNotificationHandler) HandleNewE2TInstance(e2tAddress string, podName string) {
 108
 109         err := h.routingManagerClient.AddE2TInstance(e2tAddress)
 110
 111         if err != nil {
 112                 h.logger.Errorf("#E2TermInitNotificationHandler.HandleNewE2TInstance - e2t address: %s - routing manager failure", e2tAddress)
 113                 return
 114         }
 115
 116         _ = h.e2tInstancesManager.AddE2TInstance(e2tAddress, podName)
 117 }