void RunServer()
{
//First setup our server
const bool debug = true;
OpcUa::UaServer server(debug);
server.SetEndpoint("opc.tcp://localhost:4841/freeopcua/server");
server.SetServerURI("urn://exampleserver.freeopcua.github.io");
server.Start();
//then register our server namespace and get its index in server
uint32_t idx = server.RegisterNamespace("http://examples.freeopcua.github.io");
//Create our address space using different methods
Node objects = server.GetObjectsNode();
//Add a custom object with specific nodeid
NodeId nid(99, idx);
QualifiedName qn("NewObject", idx);
Node newobject = objects.AddObject(nid, qn);
//Add a variable and a property with auto-generated nodeid to our custom object
Node myvar = newobject.AddVariable(idx, "MyVariable", Variant(8));
Node myprop = newobject.AddVariable(idx, "MyProperty", Variant(8.8));
//browse root node on server side
Node root = server.GetRootNode();
std::cout << "Root node is: " << root << std::endl;
std::cout << "Childs are: " << std::endl;
for (Node node : root.GetChildren())
{
std::cout << " " << node << std::endl;
}
//Uncomment following to subscribe to datachange events inside server
/*
SubClient clt;
std::unique_ptr<Subscription> sub = server.CreateSubscription(100, clt);
sub->SubscribeDataChange(myvar);
*/
//Now write values to address space and send events so clients can have some fun
uint32_t counter = 0;
myvar.SetValue(Variant(counter)); //will change value and trigger datachange event
//Create event
server.EnableEventNotification();
Event ev(ObjectId::BaseEventType); //you should create your own type
ev.Severity = 2;
ev.SourceNode = ObjectId::Server;
ev.SourceName = "Event from FreeOpcUA";
ev.Time = DateTime::Current();
std::cout << "Ctrl-C to exit" << std::endl;
for (;;)
{
myvar.SetValue(Variant(++counter)); //will change value and trigger datachange event
std::stringstream ss;
ss << "This is event number: " << counter;
ev.Message = LocalizedText(ss.str());
server.TriggerEvent(ev);
std::this_thread::sleep_for(std::chrono::milliseconds(5000));
}
server.Stop();
}
