async def main():
client = Client("opc.tcp://localhost:53530/OPCUA/SimulationServer/")
client.set_security_string(
"Basic256Sha256,Sign,certificate-example.der,private-key-example.pem")
client.session_timeout = 2000
async with client:
root = client.nodes.root
objects = client.nodes.objects
while True:
print("childs og objects are: ", await objects.get_children())
await asyncio.sleep(1)
async def test_subscription_keepalive_count(mocker):
"""
Check the subscription parameter MaxKeepAliveCount value
with various publishInterval and session_timeout values.
"""
mock_subscription = mocker.patch(
"asyncua.common.subscription.Subscription.init", new=CoroutineMock())
c = Client("opc.tcp://fake")
# session timeout < publish_interval
c.session_timeout = 30000 # ms
publish_interval = 1000 # ms
handler = 123
sub = await c.create_subscription(publish_interval, handler)
assert sub.parameters.RequestedMaxKeepAliveCount == 22
# session_timeout > publish_interval
c.session_timeout = 30000
publish_interval = 75000
sub = await c.create_subscription(publish_interval, handler)
assert sub.parameters.RequestedMaxKeepAliveCount == 0
def test_get_keepalive_count(mocker):
"""
Check the subscription parameter MaxKeepAliveCount value
with various publishInterval and session_timeout values.
"""
c = Client("opc.tcp://fake")
# session timeout < publish_interval
publish_interval = 1000 # ms
c.session_timeout = 30000 # ms
keepalive_count = c.get_keepalive_count(publish_interval)
assert keepalive_count == 22
# session_timeout > publish_interval
publish_interval = 75000
c.session_timeout = 30000
keepalive_count = c.get_keepalive_count(publish_interval)
assert keepalive_count == 0
# RequestedPublishingInterval == 0
publish_interval = 0
keepalive_count = c.get_keepalive_count(publish_interval)
assert keepalive_count == 22
def __init__(self,
config: HaConfig,
security: Optional[HaSecurityConfig] = None,
loop=None) -> None:
self._config: HaConfig = config
self._keepalive_task: Dict[KeepAlive, asyncio.Task] = {}
self._manager_task: Dict[HaManager, asyncio.Task] = {}
self._reconciliator_task: Dict[Reconciliator, asyncio.Task] = {}
self._gen_sub: Generator[str, None, None] = self.generate_sub_name()
self.loop: asyncio.unix_events._UnixSelectorEventLoop = (
loop or asyncio.get_event_loop())
self._url_to_reset_lock = asyncio.Lock(loop=self.loop)
self._ideal_map_lock: asyncio.Lock = asyncio.Lock(loop=self.loop)
self._client_lock: asyncio.Lock = asyncio.Lock(loop=self.loop)
self.clients: Dict[Client, ServerInfo] = {}
self.active_client: Optional[Client] = None
# full type: Dict[str, SortedDict[str, VirtualSubscription]]
self.ideal_map: Dict[str, SortedDict] = {}
self.sub_names: Set[str] = set()
self.url_to_reset: Set[str] = set()
self.is_running = False
if config.ha_mode != HaMode.WARM:
# TODO
# Check if transparent redundancy support exist for the server (nodeid=2035)
# and prevent using HaClient with such servers.
raise NotImplementedError(
f"{config.ha_mode} not currently supported by HaClient")
for url in self.urls:
c = Client(url,
timeout=self._config.request_timeout,
loop=self.loop)
# timeouts for the session and secure channel are in ms
c.session_timeout = self._config.session_timeout * 1000
c.secure_channel_timeout = self._config.secure_channel_timeout * 1000
c.description = self._config.session_name
server_info = ServerInfo(url)
self.clients[c] = server_info
self.ideal_map[url] = SortedDict()
# security can also be set via the set_security method
self.security_config: HaSecurityConfig = (security if security else
HaSecurityConfig())
self.manager = HaManager(self, self._config.manager_timer)
self.reconciliator = Reconciliator(self._config.reconciliator_timer,
self)