notification.js

const GLib = imports.gi.GLib;
const Gio = imports.gi.Gio;
const Lang = imports.lang;

const BUS_NAME = "org.freedesktop.Notifications";
const OBJECT_PATH = "/" + BUS_NAME.replace(/\./g, "\/");

const NotificationDaemonIface = <interface name="org.freedesktop.Notifications">
<method name="Notify">
    <arg type="s" direction="in"/>
    <arg type="u" direction="in"/>
    <arg type="s" direction="in"/>
    <arg type="s" direction="in"/>
    <arg type="s" direction="in"/>
    <arg type="as" direction="in"/>
    <arg type="a{sv}" direction="in"/>
    <arg type="i" direction="in"/>
    <arg type="u" direction="out"/>
</method>
</interface>;

function BusName() {
    this._init();
}

BusName.prototype = {
    _init: function() {
        var owner_id = Gio.bus_own_name(
            Gio.BusType.SESSION,            // bus
            BUS_NAME,                       // bus name
            Gio.BusNameOwnerFlags.REPLACE,  // owner flags
            null,                           // bus_acquired_cb
            Lang.bind(this, function(connection, name, userdata) { 
                print("Acquired bus name: " + name);
                print("Exporting object: " + OBJECT_PATH);
                this._export_object();
            }),                             // name_acquired_cb
            null,                           // name_lost_cb
            null                            // userdata
        );
    },

    _export_object: function() {
        this._dbusImpl = Gio.DBusExportedObject.wrapJSObject(
            NotificationDaemonIface, this);
        this._dbusImpl.export(Gio.DBus.session, OBJECT_PATH);
    }
};

function main() {
    var bus_name = new BusName();
    var main_loop = new GLib.MainLoop(null, 0);
    main_loop.run();
}

main();