Packages: gio-2.0
D-Bus

Program: client

[DBus (name = "org.example.Test")]
interface Test : Object {
	[DBus (name = "Baz")]
	public signal void bar (string j);
}

MainLoop main_loop;

void main () {
	// client
	Test test = Bus.get_proxy_sync (BusType.SESSION, "org.example.Test", "/org/example/test");

	unowned DBusProxy proxy = (DBusProxy) test;
	unowned DBusInterfaceInfo? iface_info = proxy.get_interface_info ();
	assert (iface_info != null);
	assert (iface_info.signals != null);
	assert (iface_info.signals[0] != null);
	assert (iface_info.signals[0].name == "Baz");
	assert (iface_info.signals[0].args != null);
	assert (iface_info.signals[0].args[0] != null);
	assert (iface_info.signals[0].args[0].signature == "s");

	assert (iface_info == (DBusInterfaceInfo?) typeof (Test).get_qdata (Quark.from_string ("vala-dbus-interface-info")));
}

Program: server

[DBus (name = "org.example.Test")]
class Test : Object {
	public signal void foo (int i);
}

MainLoop main_loop;

void client_exit (Pid pid, int status) {
	// client finished, terminate server
	assert (status == 0);
	main_loop.quit ();
}

void main () {
	var conn = Bus.get_sync (BusType.SESSION);
	conn.register_object ("/org/example/test", new Test ());

	// try to register service in session bus
	var request_result = conn.call_sync ("org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus", "RequestName",
	                                      new Variant ("(su)", "org.example.Test", 0x4), null, 0, -1);
	assert ((uint) request_result.get_child_value (0) == 1);

	// server ready, spawn client
	Pid client_pid;
	Process.spawn_async (null, { "dbus_interface_info_client" }, null, SpawnFlags.DO_NOT_REAP_CHILD, null, out client_pid);
	ChildWatch.add (client_pid, client_exit);

	main_loop = new MainLoop ();
	main_loop.run ();
}