async def test_write_callback(mocker):
server = Server()
idx = 0
# get Objects node, this is where we should put our custom stuff
opc_url = f"opc.tcp://127.0.0.1:{port_num}/freeopcua/server/"
server.set_endpoint(opc_url)
await server.init()
objects = server.nodes.objects
# populating our address space
myobj = await objects.add_object(idx, "MyObject")
myvar = await myobj.add_variable(idx, "MyVariable", 6.7)
await myvar.set_writable() # Set MyVariable to be writable by clients
# starting!
await server.start()
mocked_create_monitored_items = mocker.patch(
'tests.test_callback_service.create_monitored_items')
mocked_write_items = mocker.patch(
'tests.test_callback_service.write_items')
# Create Callback for item event
server.subscribe_server_callback(CallbackType.ItemSubscriptionCreated,
mocked_create_monitored_items)
server.subscribe_server_callback(CallbackType.PostWrite,
mocked_write_items)
assert not mocked_create_monitored_items.called
assert not mocked_write_items.called
client = Client(opc_url)
async with client:
var = await client.nodes.objects.get_child(
[f"{idx}:MyObject", f"{idx}:MyVariable"])
handler = SubscriptionHandler()
# We create a Client Subscription.
subscription = await client.create_subscription(500, handler)
nodes = [var]
await subscription.subscribe_data_change(nodes)
assert mocked_create_monitored_items.called
await subscription.delete()
await var.set_value(69.0)
assert mocked_write_items.called
await server.delete_nodes([myobj, myvar])
async def main():
# optional: setup logging
logging.basicConfig(level=logging.WARN)
#logger = logging.getLogger("asyncua.address_space")
# logger.setLevel(logging.DEBUG)
#logger = logging.getLogger("asyncua.internal_server")
# logger.setLevel(logging.DEBUG)
#logger = logging.getLogger("asyncua.binary_server_asyncio")
# logger.setLevel(logging.DEBUG)
#logger = logging.getLogger("asyncua.uaprocessor")
# logger.setLevel(logging.DEBUG)
logger = logging.getLogger("asyncua.subscription_service")
logger.setLevel(logging.DEBUG)
# now setup our server
server = Server()
await server.init()
#await server.disable_clock()
#server.set_endpoint("opc.tcp://localhost:4840/freeopcua/server/")
server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/")
server.set_server_name("FreeOpcUa Example Server")
# setup our own namespace
uri = "http://examples.freeopcua.github.io"
idx = await server.register_namespace(uri)
# get Objects node, this is where we should put our custom stuff
objects = server.nodes.objects
# populating our address space
myfolder = await objects.add_folder(idx, "myEmptyFolder")
myobj = await objects.add_object(idx, "MyObject")
myvar = await myobj.add_variable(idx, "MyVariable", 6.7)
await myvar.set_writable() # Set MyVariable to be writable by clients
# starting!
await server.start()
# Create Callback for item event
server.subscribe_server_callback(CallbackType.ItemSubscriptionCreated,
create_monitored_items)
server.subscribe_server_callback(CallbackType.ItemSubscriptionModified,
modify_monitored_items)
server.subscribe_server_callback(CallbackType.ItemSubscriptionDeleted,
delete_monitored_items)
while True:
await asyncio.sleep(1)
# setup our own namespace
uri = "http://examples.freeopcua.github.io"
idx = server.register_namespace(uri)
# get Objects node, this is where we should put our custom stuff
objects = server.nodes.objects
# populating our address space
myfolder = objects.add_folder(idx, "myEmptyFolder")
myobj = objects.add_object(idx, "MyObject")
myvar = myobj.add_variable(idx, "MyVariable", 6.7)
myvar.set_writable() # Set MyVariable to be writable by clients
# starting!
server.start()
# Create Callback for item event
server.subscribe_server_callback(CallbackType.ItemSubscriptionCreated,
create_monitored_items)
server.subscribe_server_callback(CallbackType.ItemSubscriptionModified,
modify_monitored_items)
server.subscribe_server_callback(CallbackType.ItemSubscriptionDeleted,
delete_monitored_items)
print("Available loggers are: ", logging.Logger.manager.loggerDict.keys())
try:
# enable following if you want to subscribe to nodes on server side
embed()
finally:
server.stop()
