Create server-extension-object-as-method-argument.py

Author: AndreasHeine

examples/server-extension-object-as-method-argument.py

@@ -0,0 +1,60 @@
+from opcua import Server, ua, uamethod
+
+@uamethod
+def callback(parent, in_extobj):
+
+    out_extobj = ua.uaprotocol_auto.AxisInformation() # get new instanace of AxisInformation
+    out_extobj.EngineeringUnits = in_extobj.EngineeringUnits
+    out_extobj.EURange.Low = in_extobj.EURange.Low
+    out_extobj.EURange.High = in_extobj.EURange.High
+    out_extobj.Title = in_extobj.Title
+    out_extobj.AxisScaleType = in_extobj.AxisScaleType
+    out_extobj.AxisSteps = in_extobj.AxisSteps
+
+    axis_info.set_value(out_extobj) #write values to variable
+    
+    return [
+        out_extobj
+    ]
+
+server = Server()
+server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/")
+server.set_security_policy([ua.SecurityPolicyType.NoSecurity])
+
+obj = server.get_objects_node()
+idx = server.register_namespace("http://examples.freeopcua.github.io")
+
+server.load_type_definitions()
+
+inarg_extobj = ua.Argument()
+inarg_extobj.Name = "In"
+inarg_extobj.DataType = ua.NodeId(12079, 0)
+inarg_extobj.ValueRank = -1
+inarg_extobj.ArrayDimensions = []
+inarg_extobj.Description = ua.LocalizedText("Wanted AxisInformation")
+
+outarg_extobj = ua.Argument()
+outarg_extobj.Name = "Out"
+outarg_extobj.DataType = ua.NodeId(12079, 0)
+outarg_extobj.ValueRank = -1
+outarg_extobj.ArrayDimensions = []
+outarg_extobj.Description = ua.LocalizedText("Actual AxisInformation")
+
+method_parent = obj.add_object(idx, "Methods")
+method_node = method_parent.add_method(
+    idx, 
+    "SetAxisInformation", 
+    callback, 
+    [
+        inarg_extobj
+    ], 
+    [
+        outarg_extobj
+    ]
+)
+
+#add a variable of type AxisInformation
+axis_info = obj.add_variable(idx, "AxisInformation", ua.uaprotocol_auto.AxisInformation(), varianttype=ua.VariantType.ExtensionObject)
+
+if  __name__ == "__main__":
+    server.start()