# Copyright 2022-2024 ETSI SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
#
# 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.
import datetime, logging
from sqlalchemy.dialects.postgresql import insert
from sqlalchemy.engine import Engine
from sqlalchemy.orm import Session, selectinload, sessionmaker
from sqlalchemy_cockroachdb import run_transaction
from typing import Dict, List, Optional, Set, Tuple
from common.proto.context_pb2 import (
Empty, EventTypeEnum, OpticalLink, LinkId, OpticalLinkList, TopologyId
)
from common.message_broker.MessageBroker import MessageBroker
from common.method_wrappers.ServiceExceptions import NotFoundException
from common.tools.object_factory.Link import json_link_id
from .models.OpticalLinkModel import OpticalLinkModel,OpticalLinkEndPointModel
from .models.TopologyModel import TopologyOpticalLinkModel, TopologyModel
from .uuids.EndPoint import endpoint_get_uuid
from .uuids.Link import link_get_uuid
from .uuids.Topology import topology_get_uuid
from .Events import notify_event_link
LOGGER = logging.getLogger(__name__)
def optical_link_list_objs(db_engine : Engine) -> OpticalLinkList:
def callback(session : Session) -> List[Dict]:
obj_list : List[OpticalLinkModel] = session.query(OpticalLinkModel)\
.options(selectinload(OpticalLinkModel.opticallink_endpoints))\
.all()
return [obj.dump() for obj in obj_list]
links = run_transaction(sessionmaker(bind=db_engine), callback)
return OpticalLinkList(optical_links=links)
def optical_link_get(db_engine : Engine, request : LinkId) -> OpticalLink:
link_uuid = link_get_uuid(request, allow_random=False)
def callback(session : Session) -> Optional[Dict]:
obj : Optional[OpticalLinkModel] = session.query(OpticalLinkModel)\
.options(selectinload(OpticalLinkModel.opticallink_endpoints))\
.filter_by(opticallink_uuid=link_uuid).one_or_none()
return None if obj is None else obj.dump()
obj = run_transaction(sessionmaker(bind=db_engine), callback)
if obj is None:
raw_link_uuid = request.link_uuid.uuid
raise NotFoundException('Optical Link', raw_link_uuid, extra_details=[
'link_uuid generated was: {:s}'.format(link_uuid)
])
return OpticalLink(**obj)
def optical_link_set(db_engine : Engine, messagebroker : MessageBroker, request : OpticalLink) -> LinkId:
raw_link_uuid = request.link_id.link_uuid.uuid
raw_link_name = request.name
link_name = raw_link_uuid if len(raw_link_name) == 0 else raw_link_name
link_uuid = link_get_uuid(request.link_id, link_name=link_name, allow_random=True)
now = datetime.datetime.now(datetime.timezone.utc)
# By default, always add link to default Context/Topology
topology_uuids : Set[str] = set()
related_topologies : List[Dict] = list()
_,topology_uuid = topology_get_uuid(TopologyId(), allow_random=False, allow_default=True)
related_topologies.append({
'topology_uuid': topology_uuid,
'optical_link_uuid' : link_uuid,
})
topology_uuids.add(topology_uuid)
link_endpoints_data : List[Dict] = list()
for i,endpoint_id in enumerate(request.link_endpoint_ids):
endpoint_topology_uuid, endpoint_device_uuid, endpoint_uuid = endpoint_get_uuid(
endpoint_id, endpoint_name="", allow_random=True)
link_endpoints_data.append({
'link_uuid' : link_uuid,
'endpoint_uuid': endpoint_uuid,
})
if endpoint_topology_uuid not in topology_uuids:
related_topologies.append({
'topology_uuid': endpoint_topology_uuid,
'optical_link_uuid' : link_uuid,
})
topology_uuids.add(endpoint_topology_uuid)
optical_link_data = [{
'opticallink_uuid' : link_uuid,
'name' : link_name,
'created_at' : now,
'updated_at' : now,
'length' : request.optical_details.length,
"src_port" : request.optical_details.src_port,
"dst_port" : request.optical_details.dst_port,
"local_peer_port" : request.optical_details.local_peer_port,
"remote_peer_port" : request.optical_details.remote_peer_port,
"used" : request.optical_details.used,
"c_slots" : request.optical_details.c_slots ,
"l_slots" : request.optical_details.l_slots,
"s_slots" : request.optical_details.s_slots,
}]
def callback(session : Session) -> Tuple[bool, List[Dict]]:
stmt = insert(OpticalLinkModel).values(optical_link_data)
stmt = stmt.on_conflict_do_update(
index_elements=[OpticalLinkModel.opticallink_uuid],
set_=dict(
updated_at = stmt.excluded.updated_at,
src_port = stmt.excluded.src_port,
dst_port = stmt.excluded.dst_port,
local_peer_port = stmt.excluded.local_peer_port,
remote_peer_port = stmt.excluded.remote_peer_port,
used = stmt.excluded.used ,
c_slots = stmt.excluded.c_slots,
l_slots = stmt.excluded.l_slots,
s_slots = stmt.excluded.s_slots
)
)
stmt = stmt.returning(OpticalLinkModel.created_at, OpticalLinkModel.updated_at)
created_at,updated_at = session.execute(stmt).fetchone()
updated = updated_at > created_at
updated_endpoints = False
if len(link_endpoints_data) > 0:
stmt = insert(OpticalLinkEndPointModel).values(link_endpoints_data)
stmt = stmt.on_conflict_do_nothing(
index_elements=[OpticalLinkEndPointModel.link_uuid, OpticalLinkEndPointModel.endpoint_uuid]
)
link_endpoint_inserts = session.execute(stmt)
updated_endpoints = int(link_endpoint_inserts.rowcount) > 0
if not updated or len(related_topologies) > 1:
# Only update topology-link relations when link is created (not updated) or when endpoint_ids are
# modified (len(related_topologies) > 1).
stmt = insert(TopologyOpticalLinkModel).values(related_topologies)
stmt = stmt.on_conflict_do_nothing(
index_elements=[TopologyOpticalLinkModel.topology_uuid, TopologyOpticalLinkModel.optical_link_uuid]
)
stmt = stmt.returning(TopologyOpticalLinkModel.topology_uuid)
topology_uuids = session.execute(stmt).fetchall()
#LOGGER.warning('RAW topology_uuids={:s}'.format(str(topology_uuids)))
if len(topology_uuids) > 0:
topology_uuids = [topology_uuid[0] for topology_uuid in topology_uuids]
#LOGGER.warning('NEW topology_uuids={:s}'.format(str(topology_uuids)))
query = session.query(TopologyModel)
query = query.filter(TopologyModel.topology_uuid.in_(topology_uuids))
link_topologies : List[TopologyModel] = query.all()
link_topology_ids = [obj.dump_id() for obj in link_topologies]
#LOGGER.warning('link_topology_ids={:s}'.format(str(link_topology_ids)))
return updated or updated_endpoints
updated = run_transaction(sessionmaker(bind=db_engine), callback )
link_id = json_link_id(link_uuid)
event_type = EventTypeEnum.EVENTTYPE_UPDATE if updated else EventTypeEnum.EVENTTYPE_CREATE
notify_event_link(messagebroker, event_type, link_id)
return LinkId(**link_id)
def optical_link_delete(db_engine : Engine, messagebroker : MessageBroker, request : LinkId) -> Empty:
link_uuid = link_get_uuid(request, allow_random=False)
def callback(session : Session) -> bool:
num_deleted = session.query(OpticalLinkModel).filter_by(opticallink_uuid=link_uuid).delete()
return num_deleted > 0
deleted = run_transaction(sessionmaker(bind=db_engine), callback)
link_id = json_link_id(link_uuid)
if deleted:
notify_event_link(messagebroker, EventTypeEnum.EVENTTYPE_REMOVE, link_id)
return Empty()