I run them under Linux, and I have found that the web server needs to have X
running, and in fact, there must be someone logged on to X so that the
DISPLAY=:0.0 will be available and usable.
It's a bit odd, but even if the image generation will NOT display the image,
Java (blackdown jdk 1.1.7) will not return things like Graphics to draw the
image on unless you have either displayed the Frame (or better by calling
addNotify() to get the peers created without actually displaying
anything) -- via frame.setVisible(true); frame.setVisible(false); -- and you
can't do these without having the display available.
But, I'd sure like to know if anybody has solved this better. As it is
right now, whenever my web server is rebooted, I must login (to any X
account) via xdm to allow the DISPLAY to work.
David
>I know that many of you have experience using dynamically generated
>images from servlets on Solaris/UNIX hosts and was wondering if anybody
>had an answer to a recurring problem of mine. I have a servlet that
>generates an image and serves it back to the client. I'm trying to
>explain to an ISP how to set up their system for image generation. My
>questions are:
>
>What software has to be installed on the Web server?
>What system environment variables have to be set?
>What has to be running on the Web server to make it all work?
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