+ACTIVITY_PREPARE_VNF_RECORDS = "prepare-vnf-records"
+ACTIVITY_DEPLOY_NS = "deploy-ns"
+ACTIVITY_UPDATE_NS_STATE = "update-ns-state"
+ACTIVITY_CHECK_NS_INSTANTIATION_FINISHED = "check-ns-instantiation-finish"
+ACTIVITY_CREATE_MODEL = "create-model"
+ACTIVITY_GET_MODEL_INFO = "get-model-info"
+ACTIVITY_DEPLOY_CHARM = "deploy-charm"
+ACTIVITY_CHECK_CHARM_STATUS = "check-charm-status"
+ACTIVITY_CHANGE_VNF_STATE = "change-vnf-state"
+ACTIVITY_CHANGE_VNF_INSTANTIATION_STATE = "change-vnf-instantiation-state"
+ACTIVITY_SEND_NOTIFICATION_FOR_VNF = "send-notification-for-vnf"
+ACTIVITY_GET_TASK_QUEUE = "get_task_queue"
+ACTIVITY_GET_VNF_DETAILS = "get_vnf_details"