java-gnome-developer

[Java-gnome-developer] Problem getting change notifications from GConf

[Pierre-Charles D. <pc...@gm...>]

Hi all,

I'm trying to use the gconf bindings (libgconf-java-2.12.5) from Java.
It works well when requesting values, but I can't seem to get
notifications of changes. I'm new both to java-gnome and gconf itself,
so I may be missing something obvious.

Below is the code I am running. While it is waiting on the last line,
I run gconf-editor and manually change the (boolean) value of the key
"/apps/baobab/properties/enable_home_monitor"; I was expecting my
listener to be called, but it is not. Am I doing something wrong /
misunderstanding gconf, or is this feature not supported yet?

Thanks in advance.

    public static void main(String[] args) throws Exception {
        ConfClient cc = ConfClient.getInstance();
        cc.addDirectory("/apps/baobab/properties",
ConfClientPreloadType.RECURSIVE);
        System.out.println(cc.get("/apps/baobab/properties/enable_home_monitor"));
        cc.addListener(new ConfClientListener() {
            public void clientNotify(ConfEntry entry) {
                System.out.println(entry.getKey() + " = " + entry.getValue());
            }
        }, "/apps/baobab/properties");
        new BufferedReader(new InputStreamReader(System.in)).readLine();
    }

Re: [Java-gnome-developer] Problem getting change notifications from GConf

[Mark H. <mh...@ti...>]

I've not tried, but I'd expect that this is integrated with the glib
main loop, so you only get notifications when one of your threads is
running gtk.main().

On 11/27/06, Pierre-Charles David <pc...@gm...> wrote:
> Hi all,
>
> I'm trying to use the gconf bindings (libgconf-java-2.12.5) from Java.
> It works well when requesting values, but I can't seem to get
> notifications of changes. I'm new both to java-gnome and gconf itself,
> so I may be missing something obvious.
>
> Below is the code I am running. While it is waiting on the last line,
> I run gconf-editor and manually change the (boolean) value of the key
> "/apps/baobab/properties/enable_home_monitor"; I was expecting my
> listener to be called, but it is not. Am I doing something wrong /
> misunderstanding gconf, or is this feature not supported yet?
>
> Thanks in advance.
>
>     public static void main(String[] args) throws Exception {
>         ConfClient cc = ConfClient.getInstance();
>         cc.addDirectory("/apps/baobab/properties",
> ConfClientPreloadType.RECURSIVE);
>         System.out.println(cc.get("/apps/baobab/properties/enable_home_monitor"));
>         cc.addListener(new ConfClientListener() {
>             public void clientNotify(ConfEntry entry) {
>                 System.out.println(entry.getKey() + " = " + entry.getValue());
>             }
>         }, "/apps/baobab/properties");
>         new BufferedReader(new InputStreamReader(System.in)).readLine();
>     }
>
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Re: [Java-gnome-developer] Problem getting change notifications from GConf

[Pierre-Charles D. <pc...@gm...>]

2006/11/27, Mark Howard <mh...@ti...>:
> I've not tried, but I'd expect that this is integrated with the glib
> main loop, so you only get notifications when one of your threads is
> running gtk.main().

Yep, that was it. Wrapping the code with Gtk.init() / Gtk.main() makes
it work as expected.

Thanks a lot, I wouldn't have thought of that!

Re: [Java-gnome-developer] Problem getting change notifications from GConf

[Andrew C. <an...@op...>]

On Mon, 2006-11-27 at 13:04 +0000, Mark Howard wrote:
> I've not tried, but I'd expect that this is integrated with the glib
> main loop, so you only get notifications when one of your threads is
> running Gtk.main().

Incidentally, one of the things I've been leaning towards adding in 4.0
is a Glib.init(). There isn't such a thing in as g_init() of course
(although one DOES have to call g_type_init() if using gobject et al and
even though gtk_init() does that for you I'm doing it explicitly much
earlier in the execution path) but for the case where you're not
actually using GTK it is a but strange to have to fire it up in your
code.

And the main loop is a GLib construct, after all.

So maybe we'll expose a GLib.main() but block its use if Gtk.init() /
Gtk.main() have been used.

The other possibility is to do it on library load automatically. Still
fiddling. I'll write an email to -hackers when something concrete
precipitates out.

AfC
Singapore

--=20
Andrew Frederick Cowie

Technology strategy, managing change, establishing procedures,
and executing successful upgrades to mission critical business
infrastructure.

That, and hackin' in java-gnome! Need something done, call us!

http://www.operationaldynamics.com/

Sydney   New York   Toronto   London

Re: [Java-gnome-developer] Problem getting change notifications from GConf

[Andrew C. <an...@op...>]

On Mon, 2006-11-27 at 11:23 +0100, Pierre-Charles David wrote:
> so I may be missing something obvious.

Probably not. That code was written several years ago by {Jeff?} and I
don't think anyone has touched it since. I'm glad to hear that at least
getting works.

Did you try looking at the example code in libgconf-java/doc/examples ?

If you figure it out and want to contribute a patch, or need to talk
about the internal details of the present 2.x code, then by all means
come up on java-gnome-hackers or #java-gnome

Good luck!

AfC
Bangalore

--=20
Andrew Frederick Cowie

Technology strategy, managing change, establishing procedures,
and executing successful upgrades to mission critical business
infrastructure.

http://www.operationaldynamics.com/

Sydney   New York   Toronto   London