First commit

setup/e2mgr/E2Manager/managers/ran_disconnection_manager.go

@@ -0,0 +1,93 @@
+//
+// 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/configuration"
+	"e2mgr/logger"
+	"e2mgr/services"
+	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
+)
+
+type IRanDisconnectionManager interface {
+	DisconnectRan(inventoryName string) error
+}
+
+type RanDisconnectionManager struct {
+	logger                *logger.Logger
+	config                *configuration.Configuration
+	rnibDataService       services.RNibDataService
+	ranSetupManager       *RanSetupManager
+	e2tAssociationManager *E2TAssociationManager
+}
+
+func NewRanDisconnectionManager(logger *logger.Logger, config *configuration.Configuration, rnibDataService services.RNibDataService, e2tAssociationManager *E2TAssociationManager) *RanDisconnectionManager {
+	return &RanDisconnectionManager{
+		logger:                logger,
+		config:                config,
+		rnibDataService:       rnibDataService,
+		e2tAssociationManager: e2tAssociationManager,
+	}
+}
+
+func (m *RanDisconnectionManager) DisconnectRan(inventoryName string) error {
+	nodebInfo, err := m.rnibDataService.GetNodeb(inventoryName)
+
+	if err != nil {
+		m.logger.Errorf("#RanDisconnectionManager.DisconnectRan - RAN name: %s - Failed fetching RAN from rNib. Error: %v", inventoryName, err)
+		return err
+	}
+
+	connectionStatus := nodebInfo.GetConnectionStatus()
+	m.logger.Infof("#RanDisconnectionManager.DisconnectRan - RAN name: %s - RAN's connection status: %s", nodebInfo.RanName, connectionStatus)
+
+
+	if connectionStatus == entities.ConnectionStatus_SHUT_DOWN {
+		m.logger.Warnf("#RanDisconnectionManager.DisconnectRan - RAN name: %s - quit. RAN's connection status is SHUT_DOWN", nodebInfo.RanName)
+		return nil
+	}
+
+	if connectionStatus == entities.ConnectionStatus_SHUTTING_DOWN {
+		return m.updateNodebInfo(nodebInfo, entities.ConnectionStatus_SHUT_DOWN)
+	}
+
+	err = m.updateNodebInfo(nodebInfo, entities.ConnectionStatus_DISCONNECTED)
+
+	if err != nil {
+		return err
+	}
+
+	e2tAddress := nodebInfo.AssociatedE2TInstanceAddress
+	return m.e2tAssociationManager.DissociateRan(e2tAddress, nodebInfo.RanName)
+}
+
+func (m *RanDisconnectionManager) updateNodebInfo(nodebInfo *entities.NodebInfo, connectionStatus entities.ConnectionStatus) error {
+
+	nodebInfo.ConnectionStatus = connectionStatus;
+	err := m.rnibDataService.UpdateNodebInfo(nodebInfo)
+
+	if err != nil {
+		m.logger.Errorf("#RanDisconnectionManager.updateNodebInfo - RAN name: %s - Failed updating RAN's connection status to %s in rNib. Error: %v", nodebInfo.RanName, connectionStatus, err)
+		return err
+	}
+
+	m.logger.Infof("#RanDisconnectionManager.updateNodebInfo - RAN name: %s - Successfully updated rNib. RAN's current connection status: %s", nodebInfo.RanName, nodebInfo.ConnectionStatus)
+	return nil
+}