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 }
  43
  44 func NewE2TShutdownManager(logger *logger.Logger, config *configuration.Configuration, rnibDataService services.RNibDataService, e2TInstancesManager IE2TInstancesManager, e2tAssociationManager *E2TAssociationManager) *E2TShutdownManager {
  45         return &E2TShutdownManager{
  46                 logger:                logger,
  47                 config:                config,
  48                 rnibDataService:       rnibDataService,
  49                 e2TInstancesManager:   e2TInstancesManager,
  50                 e2tAssociationManager: e2tAssociationManager,
  51         }
  52 }
  53
  54 func (m E2TShutdownManager) Shutdown(e2tInstance *entities.E2TInstance) error {
  55         m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is Dead, RIP", e2tInstance.Address)
  56
  57         isE2tInstanceBeingDeleted := m.isE2tInstanceAlreadyBeingDeleted(e2tInstance)
  58         if isE2tInstanceBeingDeleted {
  59                 m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s is already being deleted", e2tInstance.Address)
  60                 return nil
  61         }
  62
  63         err := m.markE2tInstanceToBeDeleted(e2tInstance)
  64         if err != nil {
  65                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to mark E2T %s as 'ToBeDeleted'.", e2tInstance.Address)
  66                 return err
  67         }
  68
  69         err = m.clearNodebsAssociation(e2tInstance.AssociatedRanList)
  70         if err != nil {
  71                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to clear nodebs association to E2T %s.", e2tInstance.Address)
  72                 return err
  73         }
  74
  75         err = m.e2tAssociationManager.RemoveE2tInstance(e2tInstance)
  76         if err != nil {
  77                 m.logger.Errorf("#E2TShutdownManager.Shutdown - Failed to remove E2T %s.", e2tInstance.Address)
  78                 return err
  79         }
  80
  81
  82         m.logger.Infof("#E2TShutdownManager.Shutdown - E2T %s was shutdown successfully.", e2tInstance.Address)
  83         return nil
  84 }
  85
  86 func (m E2TShutdownManager) clearNodebsAssociation(ranNamesToBeDissociated []string) error {
  87         for _, ranName := range ranNamesToBeDissociated {
  88                 nodeb, err := m.rnibDataService.GetNodeb(ranName)
  89                 if err != nil {
  90                         m.logger.Warnf("#E2TShutdownManager.associateAndSetupNodebs - Failed to get nodeb %s from db.", ranName)
  91                         _, ok := err.(*common.ResourceNotFoundError)
  92                         if !ok {
  93                                 continue
  94                         }
  95                         return err
  96                 }
  97                 nodeb.AssociatedE2TInstanceAddress = ""
  98                 nodeb.ConnectionStatus = entities.ConnectionStatus_DISCONNECTED
  99
 100                 err = m.rnibDataService.UpdateNodebInfo(nodeb)
 101                 if err != nil {
 102                         m.logger.Errorf("#E2TShutdownManager.associateAndSetupNodebs - Failed to save nodeb %s from db.", ranName)
 103                         return err
 104                 }
 105         }
 106         return nil
 107 }
 108
 109 func (m E2TShutdownManager) markE2tInstanceToBeDeleted(e2tInstance *entities.E2TInstance) error {
 110         e2tInstance.State = entities.ToBeDeleted
 111         e2tInstance.DeletionTimestamp = time.Now().UnixNano()
 112
 113         return m.rnibDataService.SaveE2TInstance(e2tInstance)
 114 }
 115
 116 func (m E2TShutdownManager) isE2tInstanceAlreadyBeingDeleted(e2tInstance *entities.E2TInstance) bool {
 117         delta := time.Now().UnixNano() - e2tInstance.DeletionTimestamp
 118         timestampNanosec := int64(time.Duration(m.config.E2TInstanceDeletionTimeoutMs) * time.Millisecond)
 119
 120         return e2tInstance.State == entities.ToBeDeleted && delta <= timestampNanosec
 121 }