Newer
Older
# 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 common.proto.context_pb2 import Connection, Empty, EndPointId
from common.proto.pathcomp_pb2 import PathCompReply, PathCompRequest
from common.proto.pathcomp_pb2_grpc import PathCompServiceServicer
from common.rpc_method_wrapper.Decorator import create_metrics, safe_and_metered_rpc_method
from common.tools.grpc.Tools import grpc_message_to_json, grpc_message_to_json_string
from context.client.ContextClient import ContextClient
from pathcomp.frontend.Config import BACKEND_HOST, BACKEND_PORT, BACKEND_URL
from pathcomp.frontend.service.tools.ComposeRequest import compose_device, compose_link, compose_service
LOGGER = logging.getLogger(__name__)
SERVICE_NAME = 'PathComp'
METHOD_NAMES = ['Compute']
METRICS = create_metrics(SERVICE_NAME, METHOD_NAMES)
class PathCompServiceServicerImpl(PathCompServiceServicer):
def __init__(self) -> None:
LOGGER.debug('Creating Servicer...')
LOGGER.debug('Servicer Created')
@safe_and_metered_rpc_method(METRICS, LOGGER)
def Compute(self, request : PathCompRequest, context : grpc.ServicerContext) -> PathCompReply:
LOGGER.info('[Compute] begin ; request = {:s}'.format(grpc_message_to_json_string(request)))
algorithm = request.WhichOneof('algorithm')
if algorithm == 'shortest_path':
# no attributes
pass
elif algorithm == 'k_shortest_path':
k_inspection = request.k_shortest_path.k_inspection
k_return = request.k_shortest_path.k_return
else:
raise NotImplementedError('Unsupported Algorithm: {:s}'.format(str(algorithm)))
algorithm = {'id': 'KSP', 'sync': False, 'k_paths': k_return}
service_list = [
compose_service(grpc_service, algorithm)
for grpc_service in request.services
]
#grpc_contexts = context_client.ListContexts(Empty())
#for grpc_context in grpc_contexts.contexts:
# # TODO: add context to request
# grpc_topologies = context_client.ListTopologies(grpc_context.context_id)
# for grpc_topology in grpc_topologies.topologies: #pylint: disable=unused-variable
# # TODO: add topology to request
# pass
grpc_devices = context_client.ListDevices(Empty())
device_list = [
compose_device(grpc_device)
for grpc_device in grpc_devices.devices
]
link_list = [
compose_link(grpc_link)
for grpc_link in grpc_links.links
]
request = {
'serviceList': service_list,
'deviceList' : device_list,
'linkList' : link_list,
}
#with open('pc-req.json', 'w', encoding='UTF-8') as f:
# f.write(json.dumps(request, sort_keys=True, indent=4))
backend_url = BACKEND_URL.format(BACKEND_HOST, BACKEND_PORT)
reply = requests.post(backend_url, json=request)
if reply.status_code not in {requests.codes.ok}:
raise Exception('Backend error({:s}) for request({:s})'.format(
str(reply.content.decode('UTF-8')), json.dumps(request, sort_keys=True)))
LOGGER.info('status_code={:s} reply={:s}'.format(
str(reply.status_code), str(reply.content.decode('UTF-8'))))
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
reply = PathCompReply()
# TODO: compose reply populating reply.services and reply.connections
for service in request.services:
# TODO: implement support for multi-point services
service_endpoint_ids = service.service_endpoint_ids
if len(service_endpoint_ids) != 2: raise NotImplementedError('Service must have 2 endpoints')
a_endpoint_id, z_endpoint_id = service_endpoint_ids[0], service_endpoint_ids[-1]
connection_uuid = str(uuid.uuid4())
connection_path_hops : List[EndPointId] = []
connection_path_hops.extend([
grpc_message_to_json(a_endpoint_id),
grpc_message_to_json(z_endpoint_id),
])
connection = Connection(**{
'connection_id': {'connection_uuid': {'uuid': connection_uuid}},
'service_id': grpc_message_to_json(service.service_id),
'path_hops_endpoint_ids': connection_path_hops,
'sub_service_ids': [],
})
reply.connections.append(connection) #pylint: disable=no-member
reply.services.append(service) #pylint: disable=no-member
LOGGER.info('[Compute] end ; reply = {:s}'.format(grpc_message_to_json_string(reply)))
return reply