E2Manager/managers/e2t_shutdown_manager.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
  18 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
  19 //  platform project (RICP).
  20
  21 package managers
  22
  23 import (
  24         "e2mgr/configuration"
  25         "e2mgr/logger"
  26         "e2mgr/services"
  27         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/common"
  28         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
  29         "time"
  30 )
  31
  32 type IE2TShutdownManager interface {
  33         Shutdown(e2tInstance *entities.E2TInstance) error
  34 }
  35
  36 type E2TShutdownManager struct {
  37         logger                        *logger.Logger
  38         config                        *configuration.Configuration
  39         rnibDataService               services.RNibDataService
  40         e2TInstancesManager           IE2TInstancesManager
  41         e2tAssociationManager         *E2TAssociationManager
  42         ranConnectStatusChangeManager IRanConnectStatusChangeManager
  43 }
  44
  45 func NewE2TShutdownManager(logger *logger.Logger, config *configuration.Configuration, rnibDataService services.RNibDataService, e2TInstancesManager IE2TInstancesManager, e2tAssociationManager *E2TAssociationManager, ranConnectStatusChangeManager IRanConnectStatusChangeManager) *E2TShutdownManager {
  46         return &E2TShutdownManager{
  47                 logger:                        logger,
  48                 config:                        config,
  49                 rnibDataService:               rnibDataService,
  50                 e2TInstancesManager:           e2TInstancesManager,
  51                 e2tAssociationManager:         e2tAssociationManager,
  52                 ranConnectStatusChangeManager: ranConnectStatusChangeManager,
  53         }
  54 }
  55
  56 func (m E2TShutdownManager) Shutdown(e2tInstance *entities.E2TInstance) error {
  57         m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is Dead, RIP", e2tInstance.Address)
  58
  59         isE2tInstanceBeingDeleted := m.isE2tInstanceAlreadyBeingDeleted(e2tInstance)
  60         if isE2tInstanceBeingDeleted {
  61                 m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is already being deleted", e2tInstance.Address)
  62                 return nil
  63         }
  64
  65         err := m.markE2tInstanceToBeDeleted(e2tInstance)
  66         if err != nil {
  67                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to mark E2T %s as 'ToBeDeleted'.", e2tInstance.Address)
  68                 return err
  69         }
  70
  71         err = m.clearNodebsAssociation(e2tInstance.AssociatedRanList)
  72         if err != nil {
  73                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to clear nodebs association to E2T %s.", e2tInstance.Address)
  74                 return err
  75         }
  76
  77         err = m.e2tAssociationManager.RemoveE2tInstance(e2tInstance)
  78         if err != nil {
  79                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to remove E2T %s.", e2tInstance.Address)
  80                 return err
  81         }
  82
  83         m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s was shutdown successfully.", e2tInstance.Address)
  84         return nil
  85 }
  86
  87 func (m E2TShutdownManager) clearNodebsAssociation(ranNamesToBeDissociated []string) error {
  88         for _, ranName := range ranNamesToBeDissociated {
  89                 nodeb, err := m.rnibDataService.GetNodeb(ranName)
  90                 if err != nil {
  91                         m.logger.Warnf("#E2TShutdownManager.associateAndSetupNodebs - Failed to get nodeb %s from db.", ranName)
  92                         _, ok := err.(*common.ResourceNotFoundError)
  93                         if !ok {
  94                                 continue
  95                         }
  96                         return err
  97                 }
  98
  99                 err = m.ranConnectStatusChangeManager.ChangeStatus(nodeb, entities.ConnectionStatus_DISCONNECTED)
 100                 if err != nil {
 101                         return err
 102                 }
 103
 104                 nodeb.AssociatedE2TInstanceAddress = ""
 105                 err = m.rnibDataService.UpdateNodebInfo(nodeb)
 106                 if err != nil {
 107                         m.logger.Errorf("#E2TShutdownManager.clearNodebsAssociation - Failed to save nodeb %s to db.", ranName)
 108                         return err
 109                 }
 110         }
 111         return nil
 112 }
 113
 114 func (m E2TShutdownManager) markE2tInstanceToBeDeleted(e2tInstance *entities.E2TInstance) error {
 115         e2tInstance.State = entities.ToBeDeleted
 116         e2tInstance.DeletionTimestamp = time.Now().UnixNano()
 117
 118         return m.rnibDataService.SaveE2TInstance(e2tInstance)
 119 }
 120
 121 func (m E2TShutdownManager) isE2tInstanceAlreadyBeingDeleted(e2tInstance *entities.E2TInstance) bool {
 122         delta := time.Now().UnixNano() - e2tInstance.DeletionTimestamp
 123         timestampNanosec := int64(time.Duration(m.config.E2TInstanceDeletionTimeoutMs) * time.Millisecond)
 124
 125         return e2tInstance.State == entities.ToBeDeleted && delta <= timestampNanosec
 126 }