test/server.js

/////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2017-2018  Ericsson AB
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v2.0
// which accompanies this distribution, and is available at
// https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html
/////////////////////////////////////////////////////////////////////////////////////
// Contributors:
// Akos Makovics
//
//  File:         server.js
//  Rev:          <RnXnn>
//  Prodnr:       CNL113861
/////////////////////////////////////////////////////////////////////////////////////

/*global require,setInterval,console */
var opcua = require("node-opcua");


// Let's create an instance of OPCUAServer
var server = new opcua.OPCUAServer(
    {
        port: 4334, // the port of the listening socket of the server
        resourcePath: "UA/MyLittleServer", // this path will be added to the endpoint resource name
        buildInfo :
        {
            productName: "MySampleServer1",
            buildNumber: "7658",
            buildDate: new Date(2014,5,2)
        }
    });

function post_initialize() {

    console.log("initialized");

    function construct_my_address_space(server) {

        var addressSpace = server.engine.addressSpace;

        // declare a new object
        var device = addressSpace.addObject({
            organizedBy: addressSpace.rootFolder.objects,
            browseName: "MyDevice"
        });

        // add some variables
        // add a variable named MyVariable1 to the newly created folder "MyDevice"
        var variable1 = 1;

        // emulate variable1 changing every 500 ms
        setInterval(function(){  variable1+=1; }, 500);

        addressSpace.addVariable({
            componentOf: device,
            browseName: "MyVariable1",
            dataType: "Double",
            value: {
                get: function () {
                    return new opcua.Variant({dataType: opcua.DataType.Double, value: variable1 });
                }
            }
        });

        /*
        // add a variable named MyVariable2 to the newly created folder "MyDevice"
        var variable2 = 10.0;

        server.engine.addressSpace.addVariable({

            componentOf: device,

            nodeId: "ns=1;b=1020FFAA", // some opaque NodeId in namespace 4

            browseName: "MyVariable2",

            dataType: "Double",

            value: {
                get: function () {
                    return new opcua.Variant({dataType: opcua.DataType.Double, value: variable2 });
                },
                set: function (variant) {
                    variable2 = parseFloat(variant.value);
                    return opcua.StatusCodes.Good;
                }
            }
        });
        */

        var os = require("os");

        function available_memory() {
            return os.freemem() / os.totalmem() * 100.0;
        }

        server.engine.addressSpace.addVariable({

            componentOf: device,
            nodeId: "ns=1;s=free_memory", // a string nodeID
            browseName: "FreeMemory",
            dataType: "Double",
            value: {
                get: () => {
                    return new opcua.Variant(
                        {
                            dataType:   opcua.DataType.Double,
                            value:      available_memory()
                        });
                    }
            }
        });
    }

    construct_my_address_space(server);

    server.start(function() {
        console.log("Server is now listening ... ( press CTRL+C to stop)");
        console.log("port ", server.endpoints[0].port);
        var endpointUrl = server.endpoints[0].endpointDescriptions()[0].endpointUrl;
        console.log(" the primary server endpoint url is ", endpointUrl );
    });
}

server.initialize(post_initialize);