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# 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 logging
from typing import Optional, Tuple, Union
from uuid import UUID, uuid5
import grpc
import logging
from typing import Optional, Tuple, Union
from uuid import UUID, uuid5
import grpc
from common.Constants import DEFAULT_CONTEXT_NAME
from common.method_wrappers.ServiceExceptions import InvalidArgumentsException
from common.proto.context_pb2 import ContextId, Slice, SliceFilter, SliceId
from common.method_wrappers.ServiceExceptions import InvalidArgumentsException
from common.proto.context_pb2 import ContextId, Slice, SliceFilter, SliceId
NAMESPACE_TFS = UUID("200e3a1f-2223-534f-a100-758e29c37f40")
NAMESPACE_TFS = UUID("200e3a1f-2223-534f-a100-758e29c37f40")
def get_slice_by_id(
context_client : ContextClient, slice_id : SliceId, rw_copy : bool = False, include_endpoint_ids : bool = True,
include_constraints : bool = True, include_service_ids : bool = True, include_subslice_ids : bool = True,
include_config_rules : bool = True
) -> Optional[Slice]:
slice_filter = SliceFilter()
slice_id = slice_filter.slice_ids.slice_ids.append(slice_id) # pylint: disable=no-member
slice_filter.include_endpoint_ids = include_endpoint_ids
slice_filter.include_constraints = include_constraints
slice_filter.include_service_ids = include_service_ids
slice_filter.include_subslice_ids = include_subslice_ids
slice_filter.include_config_rules = include_config_rules
ro_slices = context_client.SelectSlice(slice_filter)
if len(ro_slices.slices) == 0: return None
assert len(ro_slices.slices) == 1
ro_slice = ro_slices.slices[0]
if not rw_copy: return ro_slice
rw_slice = Slice()
rw_slice.CopyFrom(ro_slice)
return rw_slice
except grpc.RpcError as e:
if e.code() != grpc.StatusCode.NOT_FOUND: raise # pylint: disable=no-member
#LOGGER.exception('Unable to get slice({:s} / {:s})'.format(str(context_uuid), str(slice_uuid)))
return None
def get_slice_by_uuid(
context_client : ContextClient, slice_uuid : str, context_uuid : str = DEFAULT_CONTEXT_NAME,
rw_copy : bool = False, include_endpoint_ids : bool = True, include_constraints : bool = True,
include_service_ids : bool = True, include_subslice_ids : bool = True, include_config_rules : bool = True
) -> Optional[Slice]:
slice_id = SliceId()
slice_id.context_id.context_uuid.uuid = context_uuid # pylint: disable=no-member
slice_id.slice_uuid.uuid = slice_uuid # pylint: disable=no-member
return get_slice_by_id(
context_client, slice_id, rw_copy=rw_copy, include_endpoint_ids=include_endpoint_ids,
include_constraints=include_constraints, include_service_ids=include_service_ids,
include_subslice_ids=include_subslice_ids, include_config_rules=include_config_rules)
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def get_uuid_from_string(
str_uuid_or_name: Union[str, UUID], prefix_for_name: Optional[str] = None
) -> str:
# if UUID given, assume it is already a valid UUID
if isinstance(str_uuid_or_name, UUID):
return str_uuid_or_name
if not isinstance(str_uuid_or_name, str):
MSG = "Parameter({:s}) cannot be used to produce a UUID"
raise Exception(MSG.format(str(repr(str_uuid_or_name))))
try:
# try to parse as UUID
return str(UUID(str_uuid_or_name))
except: # pylint: disable=bare-except
# produce a UUID within TFS namespace from parameter
if prefix_for_name is not None:
str_uuid_or_name = "{:s}/{:s}".format(prefix_for_name, str_uuid_or_name)
return str(uuid5(NAMESPACE_TFS, str_uuid_or_name))
def context_get_uuid(
context_id: ContextId,
context_name: str = "",
allow_random: bool = False,
allow_default: bool = False,
) -> str:
context_uuid = context_id.context_uuid.uuid
if len(context_uuid) > 0:
return get_uuid_from_string(context_uuid)
if len(context_name) > 0:
return get_uuid_from_string(context_name)
if allow_default:
return get_uuid_from_string(DEFAULT_CONTEXT_NAME)
raise InvalidArgumentsException(
[
("context_id.context_uuid.uuid", context_uuid),
("name", context_name),
],
extra_details=["At least one is required to produce a Context UUID"],
)
def slice_get_uuid(slice_id: SliceId) -> Tuple[str, str]:
context_uuid = context_get_uuid(slice_id.context_id, allow_random=False)
raw_slice_uuid = slice_id.slice_uuid.uuid
if len(raw_slice_uuid) > 0:
return context_uuid, get_uuid_from_string(
raw_slice_uuid, prefix_for_name=context_uuid
)
raise InvalidArgumentsException(
[
("slice_id.slice_uuid.uuid", raw_slice_uuid),
],
extra_details=["At least one is required to produce a Slice UUID"],
)
def get_slice_by_defualt_id(
context_client : ContextClient, default_slice_id : SliceId, context_uuid : str = DEFAULT_CONTEXT_NAME,
rw_copy : bool = False, include_endpoint_ids : bool = True, include_constraints : bool = True,
include_service_ids : bool = True, include_subslice_ids : bool = True, include_config_rules : bool = True
) -> Optional[Slice]:
context_uuid, slice_uuid = slice_get_uuid(default_slice_id)
LOGGER.debug(f'P60: {context_uuid} {slice_uuid}')
slice_id = SliceId()
slice_id.context_id.context_uuid.uuid = context_uuid # pylint: disable=no-member
slice_id.slice_uuid.uuid = slice_uuid # pylint: disable=no-member
return get_slice_by_id(
context_client, slice_id, rw_copy=rw_copy, include_endpoint_ids=include_endpoint_ids,
include_constraints=include_constraints, include_service_ids=include_service_ids,
include_subslice_ids=include_subslice_ids, include_config_rules=include_config_rules)
def get_slice_by_defualt_name(
context_client : ContextClient, slice_name : str, context_uuid : str = DEFAULT_CONTEXT_NAME,
rw_copy : bool = False, include_endpoint_ids : bool = True, include_constraints : bool = True,
include_service_ids : bool = True, include_subslice_ids : bool = True, include_config_rules : bool = True
) -> Optional[Slice]:
default_slice_id = SliceId()
default_slice_id.context_id.context_uuid.uuid = context_uuid # pylint: disable=no-member
default_slice_id.slice_uuid.uuid = slice_name # pylint: disable=no-member
context_uuid, slice_uuid = slice_get_uuid(default_slice_id)
slice_id = SliceId()
slice_id.context_id.context_uuid.uuid = context_uuid # pylint: disable=no-member
slice_id.slice_uuid.uuid = slice_uuid # pylint: disable=no-member
return get_slice_by_id(
context_client, slice_id, rw_copy=rw_copy, include_endpoint_ids=include_endpoint_ids,
include_constraints=include_constraints, include_service_ids=include_service_ids,
include_subslice_ids=include_subslice_ids, include_config_rules=include_config_rules)