set Display from java

[rdeman]

Hello,

Is there a way, from a same JVM, to connect to several X11 displays.
I'd like to develop a kind of deamon in java that is executed once on a
Unix server (from an admin account). This daemon would provide services
at socket level to other programs, written in a different language
(Perl, C++, ...) running on the same server but from different users
(remotely logged in through an X emulation session with different
accounts). Some of those services need to open a UI (writtent in awt or
swing). So this daemon would have to open windows on several displays
(provided by the client program when connecting to the daemon).
So my question is :
1/ is this possible ?
2/ how can I do that ?

Thank you in advance
Rodolphe

I've found an open bug openned on SND
(http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4670851) but it is
still in progress ...

 

[Knute Johnson]

Hello,

Is there a way, from a same JVM, to connect to several X11 displays.
I'd like to develop a kind of deamon in java that is executed once on a
Unix server (from an admin account). This daemon would provide services
at socket level to other programs, written in a different language
(Perl, C++, ...) running on the same server but from different users
(remotely logged in through an X emulation session with different
accounts). Some of those services need to open a UI (writtent in awt or
swing). So this daemon would have to open windows on several displays
(provided by the client program when connecting to the daemon).
So my question is :
1/ is this possible ?
2/ how can I do that ?

Thank you in advance
Rodolphe

I've found an open bug openned on SND
(http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4670851) but it is
still in progress ...

Have you tried using GraphicsConfiguration? I've not done multiple
screens in Linux but it works fine in Windows.

 

[rdeman]

I haven't found a way to set the do this in any of the following
classes: GraphicConfiguration, GraphicDevice nor GraphicEnvironnement.
I would expect a function like XOpenDisplay.

Rodolphe

 

[Thomas Weidenfeller]

Hello,

Is there a way, from a same JVM, to connect to several X11 displays.

It is only three years ago that someone has asked this

http://groups.google.de/group/comp.lang.java.gui/msg/dc3e57c221ae1a50

I don't think the situation has changed. You can't do it in a simple
way. I think it is possible with a lot of senseless hacking. E.g. there
are X11 toolkits implemented in pure Java (e.g.
http://escher.sourceforge.net/). But this is raw X11. There is a lot to
do to implement a GUI with raw X11. You would have to implement some
kind of toolkit on top of it. Otherwise you will get mad.

/Thomas

 

[rdeman]

Hello Thomas,

I have tested escher and it solves my problem (just to switch from one
display to another within the same JVM) !!
I am just a bit afraid because of the release number : 0.2.2 (Jun
2004).

Anyway, thank you very much for the information

Rodolphe

 

[Thomas Weidenfeller]

I am just a bit afraid because of the release number : 0.2.2 (Jun
2004).

Well, you have the source code, you can fix it if it is broken

Seriously, FOS software like to come with that kind of understatement.
Until it is not close to perfection in the eye of the original author,
FOS software often doesn't get a 1.x or greater version number.

/Thomas