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Copy pathserver-example.py
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116 lines (91 loc) · 3.87 KB
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import sys
sys.path.insert(0, "..")
import logging
from datetime import datetime
try:
from IPython import embed
except ImportError:
import code
def embed():
vars = globals()
vars.update(locals())
shell = code.InteractiveConsole(vars)
shell.interact()
from opcua import ua, uamethod, Server
class SubHandler(object):
"""
Subscription Handler. To receive events from server for a subscription
"""
def datachange_notification(self, node, val, data):
print("Python: New data change event", node, val)
def event_notification(self, event):
print("Python: New event", event)
# method to be exposed through server
def func(parent, variant):
ret = False
if variant.Value % 2 == 0:
ret = True
return [ua.Variant(ret, ua.VariantType.Boolean)]
# method to be exposed through server
# uses a decorator to automatically convert to and from variants
@uamethod
def multiply(parent, x, y):
print("multiply method call with parameters: ", x, y)
return x * y
if __name__ == "__main__":
# optional: setup logging
logging.basicConfig(level=logging.WARN)
#logger = logging.getLogger("opcua.address_space")
# logger.setLevel(logging.DEBUG)
#logger = logging.getLogger("opcua.internal_server")
# logger.setLevel(logging.DEBUG)
#logger = logging.getLogger("opcua.binary_server_asyncio")
# logger.setLevel(logging.DEBUG)
#logger = logging.getLogger("opcua.uaprocessor")
# logger.setLevel(logging.DEBUG)
logger = logging.getLogger("opcua.subscription_service")
logger.setLevel(logging.DEBUG)
# now setup our server
server = Server()
#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 = server.register_namespace(uri)
# get Objects node, this is where we should put our custom stuff
objects = server.get_objects_node()
# 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
mystringvar = myobj.add_variable(idx, "MyStringVariable", "Really nice string")
mystringvar.set_writable() # Set MyVariable to be writable by clients
mydtvar = myobj.add_variable(idx, "MyDateTimeVar", datetime.now())
mydtvar.set_writable() # Set MyVariable to be writable by clients
myarrayvar = myobj.add_variable(idx, "myarrayvar", [6.7, 7.9])
myarrayvar = myobj.add_variable(idx, "myStronglytTypedVariable", ua.Variant([], ua.VariantType.UInt32))
myprop = myobj.add_property(idx, "myproperty", "I am a property")
mymethod = myobj.add_method(idx, "mymethod", func, [ua.VariantType.Int64], [ua.VariantType.Boolean])
multiply_node = myobj.add_method(idx, "multiply", multiply, [ua.VariantType.Int64, ua.VariantType.Int64], [ua.VariantType.Int64])
# import some nodes from xml
server.import_xml("custom_nodes.xml")
# creating an event object
# The event object automatically will have members for all events properties
myevgen = server.get_event_generator()
myevgen.event.Severity = 300
# starting!
server.start()
print("Available loggers are: ", logging.Logger.manager.loggerDict.keys())
try:
# enable following if you want to subscribe to nodes on server side
#handler = SubHandler()
#sub = server.create_subscription(500, handler)
#handle = sub.subscribe_data_change(myvar)
# trigger event, all subscribed clients wil receive it
myevgen.trigger(message="This is BaseEvent")
embed()
finally:
server.stop()