def get_client_to_discovery(self, url="opc.tcp://localhost:4840"):
"""
Create a client to discovery server and return it
"""
client = Client(url)
client.connect()
return client
def get_client_to_discovery(self, url="opc.tcp://localhost:4840"):
"""
Create a client to discovery server and return it
"""
client = Client(url)
client.connect()
return client
def register_to_discovery(self,
serverToRegister=None,
discoveryUrl=DEF_DISCOVERY_URL,
period=DEF_REGINT):
"""
Register to an OPC-UA Discovery server. Registering must be renewed at
least every 10 minutes, so this method will use our asyncio thread to
re-register every period seconds
if period is 0 registration is not automatically renewed
"""
# Detect accidental registration loops.
if len(self._registration_clients) >= self.MAX_CLIENT:
raise Exception('Max. discovery servers reached: {:d}'.format(
self.MAX_CLIENT))
# Prevent multiple registrations to one discovery server.
netloc = urlparse(discoveryUrl).netloc
for client in self._registration_clients:
if client.server_url.netloc != netloc:
continue
raise Exception(
'Already registering to discovery server: {:s}'.format(
discoveryUrl))
# Create and store client connection to discovery server.
registrationClient = Client(discoveryUrl)
registrationClient.connect()
self._registration_clients.append(registrationClient)
self._renew_registration(serverToRegister,
registrationClient,
period=period)
def register_to_discovery(self, serverToRegister=None, discoveryUrl=DEF_DISCOVERY_URL, period=DEF_REGINT):
"""
Register to an OPC-UA Discovery server. Registering must be renewed at
least every 10 minutes, so this method will use our asyncio thread to
re-register every period seconds
if period is 0 registration is not automatically renewed
"""
# Detect accidental registration loops.
if len(self._registration_clients) >= self.MAX_CLIENT:
raise Exception('Max. discovery servers reached: {:d}'.format(self.MAX_CLIENT))
# Prevent multiple registrations to one discovery server.
netloc = urlparse(discoveryUrl).netloc
for client in self._registration_clients:
if client.server_url.netloc != netloc:
continue
raise Exception('Already registering to discovery server: {:s}'.format(discoveryUrl))
# Create and store client connection to discovery server.
registrationClient = Client(discoveryUrl)
registrationClient.connect()
self._registration_clients.append(registrationClient)
self._renew_registration(serverToRegister, registrationClient, period=period)