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//
// Copyright 2019 AT&T Intellectual Property
// Copyright 2019 Nokia
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// This source code is part of the near-RT RIC (RAN Intelligent Controller)
// platform project (RICP).
package managers
import (
"e2mgr/clients"
"e2mgr/e2managererrors"
"e2mgr/logger"
"e2mgr/services"
"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
)
type E2TAssociationManager struct {
logger *logger.Logger
rnibDataService services.RNibDataService
e2tInstanceManager IE2TInstancesManager
rmClient clients.IRoutingManagerClient
ranConnectStatusChangeManager IRanConnectStatusChangeManager
}
func NewE2TAssociationManager(logger *logger.Logger, rnibDataService services.RNibDataService, e2tInstanceManager IE2TInstancesManager, rmClient clients.IRoutingManagerClient, ranConnectStatusChangeManager IRanConnectStatusChangeManager) *E2TAssociationManager {
return &E2TAssociationManager{
logger: logger,
rnibDataService: rnibDataService,
e2tInstanceManager: e2tInstanceManager,
rmClient: rmClient,
ranConnectStatusChangeManager: ranConnectStatusChangeManager,
}
}
func (m *E2TAssociationManager) AssociateRan(e2tAddress string, nodebInfo *entities.NodebInfo) error {
ranName := nodebInfo.RanName
m.logger.Infof("#E2TAssociationManager.AssociateRan - Associating RAN %s to E2T Instance address: %s", ranName, e2tAddress)
err := m.associateRanAndUpdateNodeb(e2tAddress, nodebInfo)
if err != nil {
m.logger.Errorf("#E2TAssociationManager.AssociateRan - RoutingManager failure: Failed to associate RAN %s to E2T %s. Error: %s", nodebInfo, e2tAddress, err)
return err
}
err = m.e2tInstanceManager.AddRansToInstance(e2tAddress, []string{ranName})
if err != nil {
m.logger.Errorf("#E2TAssociationManager.AssociateRan - RAN name: %s - Failed to add RAN to E2T instance %s. Error: %s", ranName, e2tAddress, err)
return e2managererrors.NewRnibDbError()
}
m.logger.Infof("#E2TAssociationManager.AssociateRan - successfully associated RAN %s with E2T %s", ranName, e2tAddress)
return nil
}
func (m *E2TAssociationManager) associateRanAndUpdateNodeb(e2tAddress string, nodebInfo *entities.NodebInfo) error {
rmErr := m.rmClient.AssociateRanToE2TInstance(e2tAddress, nodebInfo.RanName)
if rmErr != nil {
_ = m.ranConnectStatusChangeManager.ChangeStatus(nodebInfo, entities.ConnectionStatus_DISCONNECTED)
return e2managererrors.NewRoutingManagerError()
}
rnibErr := m.ranConnectStatusChangeManager.ChangeStatus(nodebInfo, entities.ConnectionStatus_CONNECTED)
if rnibErr != nil {
return e2managererrors.NewRnibDbError()
}
nodebInfo.AssociatedE2TInstanceAddress = e2tAddress
rnibErr = m.rnibDataService.UpdateNodebInfo(nodebInfo)
if rnibErr != nil {
m.logger.Errorf("#E2TAssociationManager.associateRanAndUpdateNodeb - RAN name: %s - Failed updating nodeb. Error: %s", nodebInfo.RanName, rnibErr)
return e2managererrors.NewRnibDbError()
}
return nil
}
func (m *E2TAssociationManager) DissociateRan(e2tAddress string, ranName string) error {
m.logger.Infof("#E2TAssociationManager.DissociateRan - Dissociating RAN %s from E2T Instance address: %s", ranName, e2tAddress)
nodebInfo, rnibErr := m.rnibDataService.GetNodeb(ranName)
if rnibErr != nil {
m.logger.Errorf("#E2TAssociationManager.DissociateRan - RAN name: %s - Failed fetching RAN from rNib. Error: %s", ranName, rnibErr)
return rnibErr
}
nodebInfo.AssociatedE2TInstanceAddress = ""
rnibErr = m.rnibDataService.UpdateNodebInfo(nodebInfo)
if rnibErr != nil {
m.logger.Errorf("#E2TAssociationManager.DissociateRan - RAN name: %s - Failed to update RAN.AssociatedE2TInstanceAddress in rNib. Error: %s", ranName, rnibErr)
return rnibErr
}
err := m.e2tInstanceManager.RemoveRanFromInstance(ranName, e2tAddress)
if err != nil {
m.logger.Errorf("#E2TAssociationManager.DissociateRan - RAN name: %s - Failed to remove RAN from E2T instance %s. Error: %s", ranName, e2tAddress, err)
return err
}
err = m.rmClient.DissociateRanE2TInstance(e2tAddress, ranName)
if err != nil {
m.logger.Errorf("#E2TAssociationManager.DissociateRan - RoutingManager failure: Failed to dissociate RAN %s from E2T %s. Error: %s", ranName, e2tAddress, err)
} else {
m.logger.Infof("#E2TAssociationManager.DissociateRan - successfully dissociated RAN %s from E2T %s", ranName, e2tAddress)
}
return nil
}
func (m *E2TAssociationManager) RemoveE2tInstance(e2tInstance *entities.E2TInstance) error {
m.logger.Infof("#E2TAssociationManager.RemoveE2tInstance - Removing E2T %s and dessociating its associated RANs.", e2tInstance.Address)
err := m.rmClient.DeleteE2TInstance(e2tInstance.Address, e2tInstance.AssociatedRanList)
if err != nil {
m.logger.Warnf("#E2TAssociationManager.RemoveE2tInstance - RoutingManager failure: Failed to delete E2T %s. Error: %s", e2tInstance.Address, err)
// log and continue
}
err = m.e2tInstanceManager.RemoveE2TInstance(e2tInstance.Address)
if err != nil {
m.logger.Errorf("#E2TAssociationManager.RemoveE2tInstance - Failed to remove E2T %s. Error: %s", e2tInstance.Address, err)
return err
}
m.logger.Infof("#E2TAssociationManager.RemoveE2tInstance - E2T %s successfully removed.", e2tInstance.Address)
return nil
}