Missing org.freedesktop.NetworkManager signals (DBus 2.8 and Java)

Lambrecht Jürgen J.Lambrecht at TELEVIC.com
Mon Nov 17 08:25:14 PST 2014

On 11/14/2014 04:26 PM, Lambrecht Jürgen wrote:
> Hi,
> I am trying to receive NetworkManager signals over Dbus with a Java
> program.
> But I never receive any signal.
> Although, when I start in a shell:
>     dbus-monitor --system
> "type='signal',sender='org.freedesktop.NetworkManager',interface='org.freedesktop.NetworkManager'"
> I do receive the signals.
Maybe my program has no access rights? (although it it runs as root)
I read that "Access to methods and interfaces is governed through XML 
files in |/etc/dbus-1/system.d| ".
I also found posts about people having problems running nm-applet, and 
the solution was to modify 
/etc/dbus-1/system.d/org.freedesktop.NetworkManager.conf (change "deny" 
to "allow").
But that did not help.

Could access rights (permissions, ..) be my problem?

Kind regards,
> I am new to Dbus (and to java), and I used code I found on this list:
> ref.: http://lists.freedesktop.org/archives/dbus/2013-September/015781.html
>       Missing org.freedesktop.UDisks signals (DBus 2.7 and Java)
> (I also used example code from Rm5248 - thanks both)
> I also changed DBusInterface to Path in the signals as proposed by Matt
> in that email thread.
> But no help: I receive no signal.
> I compile with Eclipse using libraries dbus-2.8.jar, hexdump-0.2.jar,
> unix-0.5.jar, JRE System Library [JavaSE-1.7].
> I run the program on my laptop (LMDE, Debian) with java version
> "1.7.0_21" and NetworkManager version (both from Eclipse and
> from the command line)
> I also test on an embedded PC with Debian server (stable v7.6) with java
> version "1.7.0_65" and NetworkManager (with only root user)
> The code is in attach. I generated NetworkManager.java with
>     CreateInterface -y -f org.freedesktop.NetworkManager
> /org/freedesktop/NetworkManager
> Any help would be really appreciated, thanks!
> Kind regards,
> Jürgen

Jürgen Lambrecht
R&D Associate
Mobile: +32 499 644 531
Twitter: JGRLambrecht
Tel: +32 (0)51 303045    Fax: +32 (0)51 310670
Televic Rail NV - Leo Bekaertlaan 1 - 8870 Izegem - Belgium
Company number 0825.539.581 - RPR Kortrijk

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