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# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (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.
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
from common.proto.context_pb2 import (
ContextId, Empty, EventTypeEnum, Service, ServiceFilter, ServiceId, ServiceIdList, ServiceList)
from common.message_broker.MessageBroker import MessageBroker
from common.method_wrappers.ServiceExceptions import InvalidArgumentException, NotFoundException
from common.tools.object_factory.Context import json_context_id
from common.tools.object_factory.Service import json_service_id
from context.service.database.ConfigRule import compose_config_rules_data, upsert_config_rules
from context.service.database.Constraint import compose_constraints_data, upsert_constraints
from .models.enums.ServiceStatus import grpc_to_enum__service_status
from .models.enums.ServiceType import grpc_to_enum__service_type
from .models.ServiceModel import ServiceModel, ServiceEndPointModel
from .uuids.Context import context_get_uuid
from .uuids.EndPoint import endpoint_get_uuid
from .uuids.Service import service_get_uuid
def service_list_ids(db_engine : Engine, request : ContextId) -> ServiceIdList:
context_uuid = context_get_uuid(request, allow_random=False)
def callback(session : Session) -> List[Dict]:
obj_list : List[ServiceModel] = session.query(ServiceModel).filter_by(context_uuid=context_uuid).all()
return [obj.dump_id() for obj in obj_list]
service_ids = run_transaction(sessionmaker(bind=db_engine), callback)
return ServiceIdList(service_ids=service_ids)
def service_list_objs(db_engine : Engine, request : ContextId) -> ServiceList:
context_uuid = context_get_uuid(request, allow_random=False)
obj_list : List[ServiceModel] = session.query(ServiceModel)\
.options(selectinload(ServiceModel.service_endpoints))\
.options(selectinload(ServiceModel.constraints))\
.options(selectinload(ServiceModel.config_rules))\
.filter_by(context_uuid=context_uuid).all()
services = run_transaction(sessionmaker(bind=db_engine), callback)
return ServiceList(services=services)
def service_get(db_engine : Engine, request : ServiceId) -> Service:
_,service_uuid = service_get_uuid(request, allow_random=False)
def callback(session : Session) -> Optional[Dict]:
obj : Optional[ServiceModel] = session.query(ServiceModel)\
.options(selectinload(ServiceModel.service_endpoints))\
.options(selectinload(ServiceModel.constraints))\
.options(selectinload(ServiceModel.config_rules))\
.filter_by(service_uuid=service_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:
context_uuid = context_get_uuid(request.context_id, allow_random=False)
raw_service_uuid = '{:s}/{:s}'.format(request.context_id.context_uuid.uuid, request.service_uuid.uuid)
raise NotFoundException('Service', raw_service_uuid, extra_details=[
'context_uuid generated was: {:s}'.format(context_uuid),
'service_uuid generated was: {:s}'.format(service_uuid),
])
def service_set(db_engine : Engine, messagebroker : MessageBroker, request : Service) -> ServiceId:
raw_context_uuid = request.service_id.context_id.context_uuid.uuid
raw_service_uuid = request.service_id.service_uuid.uuid
raw_service_name = request.name
service_name = raw_service_uuid if len(raw_service_name) == 0 else raw_service_name
context_uuid,service_uuid = service_get_uuid(request.service_id, service_name=service_name, allow_random=True)
service_type = grpc_to_enum__service_type(request.service_type)
service_status = grpc_to_enum__service_status(request.service_status.service_status)
for i,endpoint_id in enumerate(request.service_endpoint_ids):
endpoint_context_uuid = endpoint_id.topology_id.context_id.context_uuid.uuid
if len(endpoint_context_uuid) == 0:
endpoint_context_uuid = context_get_uuid(request.service_id.context_id, allow_random=False)
else:
endpoint_context_uuid = context_get_uuid(endpoint_id.topology_id.context_id, allow_random=False)
if endpoint_context_uuid != context_uuid:
raise InvalidArgumentException(
'request.service_endpoint_ids[{:d}].topology_id.context_id.context_uuid.uuid'.format(i),
endpoint_context_uuid,
['should be == request.service_id.context_id.context_uuid.uuid({:s})'.format(raw_context_uuid)])
_, _, endpoint_uuid = endpoint_get_uuid(endpoint_id, allow_random=False)
service_endpoints_data.append({
'service_uuid' : service_uuid,
'endpoint_uuid': endpoint_uuid,
constraints = compose_constraints_data(request.service_constraints, now, service_uuid=service_uuid)
config_rules = compose_config_rules_data(request.service_config.config_rules, now, service_uuid=service_uuid)
service_data = [{
'context_uuid' : context_uuid,
'service_uuid' : service_uuid,
'service_name' : service_name,
'service_type' : service_type,
'service_status': service_status,
stmt = insert(ServiceModel).values(service_data)
stmt = stmt.on_conflict_do_update(
index_elements=[ServiceModel.service_uuid],
set_=dict(
service_name = stmt.excluded.service_name,
service_type = stmt.excluded.service_type,
service_status = stmt.excluded.service_status,
stmt = stmt.returning(ServiceModel.created_at, ServiceModel.updated_at)
created_at,updated_at = session.execute(stmt).fetchone()
updated = updated_at > created_at
if len(service_endpoints_data) > 0:
stmt = insert(ServiceEndPointModel).values(service_endpoints_data)
stmt = stmt.on_conflict_do_nothing(
index_elements=[ServiceEndPointModel.service_uuid, ServiceEndPointModel.endpoint_uuid]
)
session.execute(stmt)
changed_constraints = upsert_constraints(session, constraints, service_uuid=service_uuid)
changed_config_rules = upsert_config_rules(session, config_rules, service_uuid=service_uuid)
return updated or changed_constraints or changed_config_rules
updated = run_transaction(sessionmaker(bind=db_engine), callback)
service_id = json_service_id(service_uuid, json_context_id(context_uuid))
event_type = EventTypeEnum.EVENTTYPE_UPDATE if updated else EventTypeEnum.EVENTTYPE_CREATE
notify_event_service(messagebroker, event_type, service_id)
return ServiceId(**service_id)
def service_unset(db_engine : Engine, messagebroker : MessageBroker, request : Service) -> ServiceId:
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raw_context_uuid = request.service_id.context_id.context_uuid.uuid
raw_service_uuid = request.service_id.service_uuid.uuid
raw_service_name = request.name
service_name = raw_service_uuid if len(raw_service_name) == 0 else raw_service_name
context_uuid,service_uuid = service_get_uuid(request.service_id, service_name=service_name, allow_random=False)
service_endpoint_uuids : Set[str] = set()
for i,endpoint_id in enumerate(request.service_endpoint_ids):
endpoint_context_uuid = endpoint_id.topology_id.context_id.context_uuid.uuid
if len(endpoint_context_uuid) == 0: endpoint_context_uuid = context_uuid
if endpoint_context_uuid not in {raw_context_uuid, context_uuid}:
raise InvalidArgumentException(
'request.service_endpoint_ids[{:d}].topology_id.context_id.context_uuid.uuid'.format(i),
endpoint_context_uuid,
['should be == request.service_id.context_id.context_uuid.uuid({:s})'.format(raw_context_uuid)])
service_endpoint_uuids.add(endpoint_get_uuid(endpoint_id, allow_random=False)[2])
now = datetime.datetime.utcnow()
constraints = compose_constraints_data(request.service_constraints, now, service_uuid=service_uuid)
config_rules = compose_config_rules_data(request.service_config.config_rules, now, service_uuid=service_uuid)
def callback(session : Session) -> bool:
num_deletes = 0
if len(service_endpoint_uuids) > 0:
num_deletes += session.query(ServiceEndPointModel)\
.filter(and_(
ServiceEndPointModel.service_uuid == service_uuid,
ServiceEndPointModel.endpoint_uuid.in_(service_endpoint_uuids)
)).delete()
changed_constraints = upsert_constraints(session, constraints, is_delete=True, service_uuid=service_uuid)
changed_config_rules = upsert_config_rules(session, config_rules, is_delete=True, service_uuid=service_uuid)
return num_deletes > 0 or changed_constraints or changed_config_rules
updated = run_transaction(sessionmaker(bind=db_engine), callback)
service_id = json_service_id(service_uuid, json_context_id(context_uuid))
if updated:
notify_event_service(messagebroker, EventTypeEnum.EVENTTYPE_UPDATE, service_id)
return ServiceId(**service_id)
def service_delete(db_engine : Engine, messagebroker : MessageBroker, request : ServiceId) -> Empty:
context_uuid,service_uuid = service_get_uuid(request, allow_random=False)
num_deleted = session.query(ServiceModel).filter_by(service_uuid=service_uuid).delete()
deleted = run_transaction(sessionmaker(bind=db_engine), callback)
service_id = json_service_id(service_uuid, json_context_id(context_uuid))
if deleted:
notify_event_service(messagebroker, EventTypeEnum.EVENTTYPE_REMOVE, service_id)
return Empty()
def service_select(db_engine : Engine, request : ServiceFilter) -> ServiceList:
service_uuids = [
service_get_uuid(service_id, allow_random=False)[1]
for service_id in request.service_ids.service_ids
]
dump_params = dict(
include_endpoint_ids=request.include_endpoint_ids,
include_constraints =request.include_constraints,
include_config_rules=request.include_config_rules,
)
def callback(session : Session) -> List[Dict]:
query = session.query(ServiceModel)
if request.include_endpoint_ids: query = query.options(selectinload(ServiceModel.service_endpoints))
if request.include_constraints : query = query.options(selectinload(ServiceModel.constraints))
if request.include_config_rules: query = query.options(selectinload(ServiceModel.config_rules))
obj_list : List[ServiceModel] = query.filter(ServiceModel.service_uuid.in_(service_uuids)).all()
return [obj.dump(**dump_params) for obj in obj_list]
services = run_transaction(sessionmaker(bind=db_engine), callback)
return ServiceList(services=services)