Windows Terminal Services and Swing

Question

My large swing application is being accessed remotely using Windows Terminal Services RDP protocol and is performing dreadfully in terms of screen updates. Is there an answer for this problem? Any suggestions?
Regards
David

Answer 1

In my opinion the real problem is not at all in your application.
1) Window terminal services (RDP)
Each time that the screen changes is send to client all the screen.
This is also for mouse moving.
Using more efficent software, like Citrix that is based on RDP, are
send to client only the dirrefernces, and mouse moving is managed
only by client side.
This gives advantages in performances.
Window terminal Server, also, needed a strong Server to run, in my
experiences more than 10 connections my cause a performances
problems in many cases.
2) The network
Is needed an efficient network for ship quicly all data traffic generated
for that fat application, minimum 100 Mbit.
If the network is just congestionated for others think (internet browsing,
an lot of file exchange and so on) the performances of terminal server
is bad. (terminal server ships a lot of information across the network)
3) Your application.
Control if too many repaint() or revalidate() are called.
For do that simply u can override that methods in this way in your costom components:
public void repaint()
super.repaint();
System.out.println("Repainting of MyComponent");
the same think for revlidate.
Now, lanching your application, u can control how many times for transaction those methods are invoked.
My doubt is that, every time that a repaint or a revalidate occurs,
Terminal Server reshape all the screen for client (not so sure about
that)
I say u that because I have had a similar problem (flickering).
I have see that flickering was caused by serval repaint invocation
by swing itself.
I had solved it simply do that
public void repaint()
if (!wBatchMode)
super.repaint();
The variable wBatchMode is setted to true (for example in my custom
JTable) util I append columns and rows.
If u look for swing code for each column added, the repaint methid is
invoked.
When i have finished to populate my component i set the wBatchMode
variable to false, so the repaint method occurs only one time and no
flickering occurs.
So, if is true that Terminal Server for every revalidate/repaint reship
the screen, this method may be help u.
Regards