我在上一个问题的评论中问过这个问题,但我认为最好把它作为一个新的独立问题移到这里。
我试图弄清楚如何翻译这个Python代码,使用lgi DBus将dbus信号发送到Lua:
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)
我怀疑(根本不确定)必须将消息发送到内省的接口,类似于:
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?
但我不确定,我不知道如何使用Python中的XML设置消息体。
如果你能提供一些例子或指出我能找到它的地方,我将不胜感激!
谢谢!
嘿,Google在看https://github.com/pavouk/lgi/issues/220的时候带领我到这儿。
不知何故,我觉得你的代码示例不能正常工作/不是一些自包含的python代码。因此,我将接受案文中的评论:
发出/发布每秒随机整数的信号
Lua代码这样做(好吧,除了“随机整数”,除非你认为42
是随机的):
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()