Re: best way to remotely display a java GUI

From: perry anderson (perry_at_cplusplus.org)
Date: 07/01/04 

Date: Thu, 01 Jul 2004 11:11:52 -0300

one thing to consider if you want to use sockets or a packet approach
over ssh is that you may have to resort to a file sharing operation. i
would imagine ssh is designed to allow the ssh client to open files on
the server. this would also be a cool way to develop you app as you
don't need to develope it while using a ssh client session.

cheers

- perry

Zach wrote:
> This is all on linux using jdk1.3. My application is written in AWT,
> no swing.
>
> The application requires running it on the host machine and tunneling
> the GUI back to a client. I've been doing this via an ssh session.
> In the building the GUI works pretty much as if I was running it
> directly from the host machine, no lags or performance problems. Over
> longer distances I start to see some lagging, the GUI loses some
> responsiveness, it's not really a handicap at that point, but the
> delays are definitely noticeable.
>
> From home logged in via my roadrunner connection, I see substantial
> delays, that really impact the usefulness of the system. I can run
> GTK based applications over the same ssh session, and those respond
> beautifully.
>
> Obviously there's some performance problem there, and I'm trying to
> figure it out, and how to get around it. I've tried xhost from a
> telnet session, didn't really help much, so I'm guessing it's not SSH.
>
> So several questions come up:
> 1. What programming issues could I have ignored or missed that are
> causing this to happen? What things can I tighten up in my GUI code
> to add vigor to the GUI?
>
> 2. Is there a way of tunneling the GUI back that would get around
> these problems? The GTK based apps are rocking beautifully, even with
> the the poorer connection. Why don't they take the same performance
> hit? It doesn't seem like it's a straight java vs. native code issue.
> Is the support in X that different?
>
> I'd seen pretty horrible performance tunneling Swing applications
> before, so I've shied away from Swing.
>
> I tried the j2sdk v. 1.4.2, and actually got worse performance. Is
> that a clue?
>
> Thanks,
>
> -Charles
>
> ps. please email me at lockhart@ifa.hawaii.edu

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