Ufdjrw

I asked this in a comment of a previous question but I think it is better to move it here as a new independent question.

I am trying to figure out how to translate this Python code to emit a dbus signal into Lua using lgi DBus:

class DBUSTestInterface(object):
 """
 Server_XML definition.
 Emit / Publish a signal that is a random integer every second 
 type='i' for integer. 
 """
 dbus = """
 <node>
 <interface name="com.test.device.aaa">
 <signal name="get">
 <arg type='s'/>
 <arg type='s'/>
 <arg type='s'/>
 <arg type='s'/>
 <arg type='s'/>
 <arg type='s'/>
 <arg type='s'/>
 <arg type='i'/>
 </signal>
 </interface>
 </node>
 """
 get = signal()

emit = DBUSTestInterface()
bus.publish("com.test.device.get", emit)

I suspect (not sure at all) that it has to be made sending a message to the introspectable interface, something similar to this:

local object = "/org/freedesktop/DBus"
local interface = "org.freedesktop.DBus.Introspectable"
local method = "Introspect"
local message = Gio.DBusMessage.new_method_call(name, object, interface, method)
message:set_body(GLib.Variant("(aoo)", location,session)) -- How do I set the same message as above?

But I am not sure, and I have no idea of how to set the message body with the XML that is working in Python.

If you can provide some example or point out where I can find it I would appreciate it!

Thanks!

Heh, Google just lead me here while looking at https://github.com/pavouk/lgi/issues/220.

Somehow I feel like your code example cannot work as-is / is not some self-contained python code. Hence, I will go with the comment in the text:

Emit / Publish a signal that is a random integer every second

Lua code doing this (well, except for "random integer", unless you consider 42 to be random):

local lgi = require("lgi")
local Gio, GLib, GObject = lgi.Gio, lgi.GLib, lgi.GObject

local conn

GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, 1, function()
 if conn then
 conn:emit_signal(nil, "/your/example/has/no/path",
 "com.test.device.aaa", "get",
 GLib.Variant("(sssssssi)", "what", "are", "all",
 "these", "strings", "for", "?", 42 ))
 end
 return true
end)

local function on_bus_acquire(con)
 conn = con

 local function arg(name, signature)
 return Gio.DBusArgInfo name = name, signature = signature 
 end
 local interface_info = Gio.DBusInterfaceInfo 
 name = "com.test.device.aaa",
 signals = 
 Gio.DBusSignalInfo
 name = "get",
 args = 
 arg("no_name?!?", "s"),
 arg("no_name?!?", "s"),
 arg("no_name?!?", "s"),
 arg("no_name?!?", "s"),
 arg("no_name?!?", "s"),
 arg("no_name?!?", "s"),
 arg("no_name?!?", "s"),
 arg("no_name?!?", "i")
 
 
 
 
 conn:register_object("/your/example/has/no/path", interface_info, nil)
end

Gio.bus_own_name(Gio.BusType.SESSION, "com.test.device.get", Gio.BusNameOwnerFlags.NONE,
 GObject.Closure(on_bus_acquire), nil, nil)

GLib.MainLoop.new():run()