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# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# 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 import and_, delete
from sqlalchemy.dialects.postgresql import insert
from sqlalchemy.engine import Engine
from sqlalchemy.orm import Session, sessionmaker
from sqlalchemy_cockroachdb import run_transaction
from typing import Dict, List, Optional, Set, Tuple
from common.proto.context_pb2 import ContextId, Slice, SliceId, SliceIdList, SliceList
from common.rpc_method_wrapper.ServiceExceptions import InvalidArgumentException, NotFoundException
from common.tools.object_factory.Context import json_context_id
from common.tools.object_factory.Slice import json_slice_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.SliceStatus import grpc_to_enum__slice_status
from .models.RelationModels import SliceEndPointModel, SliceServiceModel #, SliceSubSliceModel
from .models.SliceModel import SliceModel
from .uuids.Context import context_get_uuid
from .uuids.EndPoint import endpoint_get_uuid
from .uuids.Service import service_get_uuid
from .uuids.Slice import slice_get_uuid
def slice_list_ids(db_engine : Engine, request : ContextId) -> SliceIdList:
context_uuid = context_get_uuid(request, allow_random=False)
def callback(session : Session) -> List[Dict]:
obj_list : List[SliceModel] = session.query(SliceModel).filter_by(context_uuid=context_uuid).all()
#.options(selectinload(ContextModel.slice)).filter_by(context_uuid=context_uuid).one_or_none()
return [obj.dump_id() for obj in obj_list]
return SliceIdList(slice_ids=run_transaction(sessionmaker(bind=db_engine), callback))
def slice_list_objs(db_engine : Engine, request : ContextId) -> SliceList:
context_uuid = context_get_uuid(request, allow_random=False)
def callback(session : Session) -> List[Dict]:
obj_list : List[SliceModel] = session.query(SliceModel).filter_by(context_uuid=context_uuid).all()
#.options(selectinload(ContextModel.slice)).filter_by(context_uuid=context_uuid).one_or_none()
return [obj.dump() for obj in obj_list]
return SliceList(slices=run_transaction(sessionmaker(bind=db_engine), callback))
def slice_get(db_engine : Engine, request : SliceId) -> Slice:
_,slice_uuid = slice_get_uuid(request, allow_random=False)
def callback(session : Session) -> Optional[Dict]:
obj : Optional[SliceModel] = session.query(SliceModel).filter_by(slice_uuid=slice_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_slice_uuid = '{:s}/{:s}'.format(request.context_id.context_uuid.uuid, request.slice_uuid.uuid)
raise NotFoundException('Slice', raw_slice_uuid, extra_details=[
'context_uuid generated was: {:s}'.format(context_uuid),
'slice_uuid generated was: {:s}'.format(slice_uuid),
])
return Slice(**obj)
def slice_set(db_engine : Engine, request : Slice) -> Tuple[SliceId, bool]:
raw_context_uuid = request.slice_id.context_id.context_uuid.uuid
raw_slice_uuid = request.slice_id.slice_uuid.uuid
raw_slice_name = request.name
slice_name = raw_slice_uuid if len(raw_slice_name) == 0 else raw_slice_name
context_uuid,slice_uuid = slice_get_uuid(request.slice_id, slice_name=slice_name, allow_random=True)
slice_status = grpc_to_enum__slice_status(request.slice_status.slice_status)
slice_endpoints_data : List[Dict] = list()
for i,endpoint_id in enumerate(request.slice_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.slice_endpoint_ids[{:d}].topology_id.context_id.context_uuid.uuid'.format(i),
endpoint_context_uuid,
['should be == request.slice_id.context_id.context_uuid.uuid({:s})'.format(raw_context_uuid)])
_, _, endpoint_uuid = endpoint_get_uuid(endpoint_id, allow_random=False)
slice_endpoints_data.append({
'slice_uuid' : slice_uuid,
'endpoint_uuid': endpoint_uuid,
})
slice_services_data : List[Dict] = list()
for i,service_id in enumerate(request.slice_service_ids):
_, service_uuid = service_get_uuid(service_id, allow_random=False)
slice_services_data.append({
'slice_uuid' : slice_uuid,
'service_uuid': service_uuid,
})
#slice_subslices_data : List[Dict] = list()
#for i,subslice_id in enumerate(request.slice_subslice_ids):
# _, subslice_uuid = slice_get_uuid(subslice_id, allow_random=False)
# slice_subslices_data.append({
# 'slice_uuid' : slice_uuid,
# 'subslice_uuid': subslice_uuid,
# })
constraints = compose_constraints_data(request.slice_constraints, slice_uuid=slice_uuid)
config_rules = compose_config_rules_data(request.slice_config.config_rules, slice_uuid=slice_uuid)
slice_data = [{
'context_uuid' : context_uuid,
'slice_uuid' : slice_uuid,
'slice_name' : slice_name,
'slice_status' : slice_status,
'slice_owner_uuid' : request.slice_owner.owner_uuid.uuid,
'slice_owner_string': request.slice_owner.owner_string,
}]
def callback(session : Session) -> None:
stmt = insert(SliceModel).values(slice_data)
stmt = stmt.on_conflict_do_update(
index_elements=[SliceModel.slice_uuid],
set_=dict(
slice_name = stmt.excluded.slice_name,
slice_status = stmt.excluded.slice_status,
slice_owner_uuid = stmt.excluded.slice_owner_uuid,
slice_owner_string = stmt.excluded.slice_owner_string,
)
)
session.execute(stmt)
stmt = insert(SliceEndPointModel).values(slice_endpoints_data)
stmt = stmt.on_conflict_do_nothing(
index_elements=[SliceEndPointModel.slice_uuid, SliceEndPointModel.endpoint_uuid]
)
session.execute(stmt)
stmt = insert(SliceServiceModel).values(slice_services_data)
stmt = stmt.on_conflict_do_nothing(
index_elements=[SliceServiceModel.slice_uuid, SliceServiceModel.service_uuid]
)
session.execute(stmt)
#stmt = insert(SliceSubSliceModel).values(slice_subslices_data)
#stmt = stmt.on_conflict_do_nothing(
# index_elements=[SliceSubSliceModel.slice_uuid, SliceSubSliceModel.subslice_uuid]
#)
#session.execute(stmt)
upsert_constraints(session, constraints, slice_uuid=slice_uuid)
upsert_config_rules(session, config_rules, slice_uuid=slice_uuid)
run_transaction(sessionmaker(bind=db_engine), callback)
updated = False # TODO: improve and check if created/updated
return SliceId(**json_slice_id(slice_uuid, json_context_id(context_uuid))),updated
def slice_unset(db_engine : Engine, request : Slice) -> Tuple[SliceId, bool]:
raw_context_uuid = request.slice_id.context_id.context_uuid.uuid
raw_slice_uuid = request.slice_id.slice_uuid.uuid
raw_slice_name = request.name
slice_name = raw_slice_uuid if len(raw_slice_name) == 0 else raw_slice_name
context_uuid,slice_uuid = slice_get_uuid(request.slice_id, slice_name=slice_name, allow_random=False)
if len(request.slice_constraints) > 0: raise NotImplementedError('UnsetSlice: removal of constraints')
if len(request.slice_config.config_rules) > 0: raise NotImplementedError('UnsetSlice: removal of config rules')
if len(request.slice_endpoint_ids) > 0: raise NotImplementedError('UnsetSlice: removal of endpoints')
slice_endpoint_uuids : Set[str] = set()
for i,endpoint_id in enumerate(request.slice_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.slice_endpoint_ids[{:d}].topology_id.context_id.context_uuid.uuid'.format(i),
endpoint_context_uuid,
['should be == request.slice_id.context_id.context_uuid.uuid({:s})'.format(raw_context_uuid)])
slice_endpoint_uuids.add(endpoint_get_uuid(endpoint_id, allow_random=False)[2])
slice_service_uuids : Set[str] = {
service_get_uuid(service_id, allow_random=False)[1]
for service_id in request.slice_service_ids
}
slice_subslice_uuids : Set[str] = {
slice_get_uuid(subslice_id, allow_random=False)[1]
for subslice_id in request.slice_subslice_ids
}
def callback(session : Session) -> bool:
num_deletes = 0
num_deletes += session.query(SliceServiceModel)\
.filter_by(and_(
SliceServiceModel.slice_uuid == slice_uuid,
SliceServiceModel.service_uuid.in_(slice_service_uuids)
)).delete()
#num_deletes += session.query(SliceSubSliceModel)\
# .filter_by(and_(
# SliceSubSliceModel.slice_uuid == slice_uuid,
# SliceSubSliceModel.subslice_uuid.in_(slice_subslice_uuids)
# )).delete()
num_deletes += session.query(SliceEndPointModel)\
.filter_by(and_(
SliceEndPointModel.slice_uuid == slice_uuid,
SliceEndPointModel.endpoint_uuid.in_(slice_endpoint_uuids)
)).delete()
return num_deletes > 0
updated = run_transaction(sessionmaker(bind=db_engine), callback)
return SliceId(**json_slice_id(slice_uuid, json_context_id(context_uuid))),updated
def slice_delete(db_engine : Engine, request : SliceId) -> bool:
_,slice_uuid = slice_get_uuid(request, allow_random=False)
def callback(session : Session) -> bool:
num_deleted = session.query(SliceModel).filter_by(slice_uuid=slice_uuid).delete()
return num_deleted > 0
return run_transaction(sessionmaker(bind=db_engine), callback)