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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.
import logging
import networkx as nx
import grpc
import time
from websockets.sync.client import connect
from common.method_wrappers.Decorator import (MetricsPool, MetricTypeEnum, safe_and_metered_rpc_method)
from common.proto.vnt_manager_pb2 import VNTSubscriptionRequest, VNTSubscriptionReply
from common.proto.vnt_manager_pb2_grpc import VNTManagerServiceServicer
from context.client.ContextClient import ContextClient
from common.proto.context_pb2 import (
Empty,
Event, EventTypeEnum,
Link, LinkEvent, LinkId, LinkIdList, LinkList,
)
from common.tools.object_factory.Context import json_context_id
from common.tools.object_factory.Topology import json_topology_id
from common.proto.context_pb2 import ContextId, TopologyId
import threading
from common.proto.context_pb2 import (
ConnectionEvent, ContextEvent, DeviceEvent, EventTypeEnum, ServiceEvent, TopologyEvent)
from context.client.ContextClient import ContextClient
from context.client.EventsCollector import EventsCollector
from common.tests.EventTools import EVENT_CREATE, EVENT_UPDATE, check_events
from common.Constants import DEFAULT_CONTEXT_NAME, DEFAULT_TOPOLOGY_NAME, INTERDOMAIN_TOPOLOGY_NAME
from typing import Any, Dict, Set
from common.proto.dlt_gateway_pb2 import DltRecordEvent, DltRecordOperationEnum, DltRecordTypeEnum
from common.tools.grpc.Tools import grpc_message_to_json_string
LOGGER = logging.getLogger(__name__)
METRICS_POOL = MetricsPool("VNTManager", "RPC")
context_client: ContextClient = ContextClient()
JSON_ADMIN_CONTEXT_ID = json_context_id(DEFAULT_CONTEXT_NAME)
ADMIN_CONTEXT_ID = ContextId(**JSON_ADMIN_CONTEXT_ID)
ADMIN_TOPOLOGY_ID = TopologyId(**json_topology_id(DEFAULT_TOPOLOGY_NAME, context_id=JSON_ADMIN_CONTEXT_ID))
def send_msg(url, msg):
LOGGER.info("Sending event to {}".format(url))
with connect(url, logger=LOGGER) as websocket:
send = grpc_message_to_json_string(msg)
LOGGER.info("Sending {}".format(send))
websocket.send(send)
message = websocket.recv()
LOGGER.info("Received ws: {}".format(message))
class VNTMEventDispatcher(threading.Thread):
def __init__(self, host, port) -> None:
LOGGER.debug('Creating VTNM connector...')
self.host = host
self.port = port
super().__init__(name='VNTMEventDispatcher', daemon=True)
self._terminate = threading.Event()
LOGGER.debug('VNTM connector created')
def start(self) -> None:
self._terminate.clear()
return super().start()
def stop(self):
self._terminate.set()
def run(self) -> None:
LOGGER.info('Thread running!')
events_collector = EventsCollector(
context_client, log_events_received=True,
activate_context_collector = True,
activate_topology_collector = True,
activate_device_collector = False,
activate_link_collector = False,
activate_service_collector = False,
activate_slice_collector = False,
activate_connection_collector = False,)
events_collector.start()
request = VNTSubscriptionRequest()
request.host = str(self.host)
request.port = str(self.port)
while not self._terminate.is_set():
event = events_collector.get_event(block=True, timeout=GET_EVENT_TIMEOUT)
if event is None: continue
send_msg(url, event)
events_collector.stop()
class VNTManagerServiceServicerImpl(VNTManagerServiceServicer):
def __init__(self):
LOGGER.debug("Creating Servicer...")
LOGGER.debug("Servicer Created")
self.links = []
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def VNTSubscript(self, request: VNTSubscriptionRequest, context: grpc.ServicerContext) -> VNTSubscriptionReply:
LOGGER.info('----------------')
LOGGER.info(request)
LOGGER.info('----------------')
reply = VNTSubscriptionReply()
reply.subscription = "OK"
event_dispatcher = VNTMEventDispatcher(request.host, int(request.port))
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def ListVirtualLinkIds(self, request : Empty, context : grpc.ServicerContext) -> LinkIdList:
return LinkIdList(link_ids=[link.link_id for link in self.links])
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def ListVirtualLinks(self, request : Empty, context : grpc.ServicerContext) -> LinkList:
return LinkList(link=self.links)
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def GetVirtualLink(self, request : LinkId, context : grpc.ServicerContext) -> Link:
try:
url = "ws://" + str(self.host) + ":" + str(self.port)
send_msg(url, request)
except Exception as e:
LOGGER.error('Exection getting virtual link={}\n\t{}'.format(request.link_uuid.uuid, e))
else:
for link in self.links:
if link.link_uuid.uuid == request.uuid:
return link
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def SetVirtualLink(self, request : Link, context : grpc.ServicerContext) -> LinkId:
try:
url = "ws://" + str(self.host) + ":" + str(self.port)
send_msg(url, request)
except Exception as e:
LOGGER.error('Exection setting virtual link={}\n\t{}'.format(request.link_id.link_uuid.uuid, e))
else:
self.links.append(request)
return request.linkd_id
@safe_and_metered_rpc_method(METRICS_POOL, LOGGER)
def RemoveVirtualLink(self, request : LinkId, context : grpc.ServicerContext) -> Empty:
try:
url = "ws://" + str(self.host) + ":" + str(self.port)
send_msg(url, request)
except Exception as e:
LOGGER.error('Exection removing virtual link={}\n\t{}'.format(request.link_id.link_uuid.uuid, e))
else:
for link in self.links:
if link.link_uuid.uuid == request.uuid:
self.links.remove(link)
return Empty()