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# Copyright 2022-2024 ETSI OSG/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
import grpc
from common.Constants import ServiceNameEnum
from common.proto.context_pb2 import Empty
from common.proto.vnt_manager_pb2 import VNTSubscriptionRequest, VNTSubscriptionReply
from common.proto.vnt_manager_pb2_grpc import VNTManagerServiceStub
from common.Settings import get_service_host, get_service_port_grpc
from common.tools.client.RetryDecorator import delay_exponential, retry
from common.tools.grpc.Tools import grpc_message_to_json
from common.proto.context_pb2 import (
Link, LinkId, LinkIdList, LinkList,
)
from common.tools.grpc.Tools import grpc_message_to_json_string
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LOGGER = logging.getLogger(__name__)
MAX_RETRIES = 15
DELAY_FUNCTION = delay_exponential(initial=0.01, increment=2.0, maximum=5.0)
RETRY_DECORATOR = retry(
max_retries=MAX_RETRIES,
delay_function=DELAY_FUNCTION,
prepare_method_name="connect",
)
class VNTManagerClient:
def __init__(self, host=None, port=None):
if not host:
host = get_service_host(ServiceNameEnum.VNTMANAGER)
if not port:
port = get_service_port_grpc(ServiceNameEnum.VNTMANAGER)
self.endpoint = "{:s}:{:s}".format(str(host), str(port))
LOGGER.debug("Creating channel to {:s}...".format(str(self.endpoint)))
self.channel = None
self.stub = None
self.connect()
LOGGER.debug("Channel created")
def connect(self):
self.channel = grpc.insecure_channel(self.endpoint)
self.stub = VNTManagerServiceStub(self.channel)
def close(self):
if self.channel is not None:
self.channel.close()
self.channel = None
self.stub = None
@RETRY_DECORATOR
def VNTSubscript(self, request: VNTSubscriptionRequest) -> VNTSubscriptionReply:
LOGGER.debug("Subscript request: {:s}".format(str(grpc_message_to_json(request))))
LOGGER.debug("Subscript result: {:s}".format(str(grpc_message_to_json(response))))
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return response
@RETRY_DECORATOR
def ListVirtualLinkIds(self, request: Empty) -> LinkIdList:
LOGGER.debug('ListVirtualLinkIds request: {:s}'.format(grpc_message_to_json_string(request)))
response = self.stub.ListVirtualLinkIds(request)
LOGGER.debug('ListVirtualLinkIds result: {:s}'.format(grpc_message_to_json_string(response)))
return response
@RETRY_DECORATOR
def ListVirtualLinks(self, request: Empty) -> LinkList:
LOGGER.debug('ListVirtualLinks request: {:s}'.format(grpc_message_to_json_string(request)))
response = self.stub.ListVirtualLinks(request)
LOGGER.debug('ListVirtualLinks result: {:s}'.format(grpc_message_to_json_string(response)))
return response
@RETRY_DECORATOR
def GetVirtualLink(self, request: LinkId) -> Link:
LOGGER.debug('GetVirtualLink request: {:s}'.format(grpc_message_to_json_string(request)))
response = self.stub.GetVirtualLink(request)
LOGGER.debug('GetVirtualLink result: {:s}'.format(grpc_message_to_json_string(response)))
return response
@RETRY_DECORATOR
def SetVirtualLink(self, request: Link) -> LinkId:
LOGGER.debug('SetVirtualLink request: {:s}'.format(grpc_message_to_json_string(request)))
response = self.stub.SetVirtualLink(request)
LOGGER.debug('SetVirtualLink result: {:s}'.format(grpc_message_to_json_string(response)))
return response
@RETRY_DECORATOR
def RemoveVirtualLink(self, request: LinkId) -> Empty:
LOGGER.debug('RemoveVirtualLink request: {:s}'.format(grpc_message_to_json_string(request)))
response = self.stub.RemoveVirtualLink(request)
LOGGER.debug('RemoveVirtualLink result: {:s}'.format(grpc_message_to_json_string(response)))