Re: tomcat + linux + graphics
Hi, I had the same problem some time ago. I need to generate graphics with AWT and due to problem with JVM, I needed to install a X server. The first solution that came to my mind was to start an xterm after launching the X server in the rc.local with a -e option to launch a script running tomcat. So I had a X server that consume memory and CPU on a Web server that do not need any graphics interface... Then I found a library that replace some AWT classes and allow you to generate graphics without any X server running !! The package is a GNU one, it's called PJA and you can download it from the following website: http://www.eteks.com So, I installed this package (no need to recompile, just some add to the java command line of tomcat), removed the X server from my web server, and save disk space, save CPU ressource and freed a lot of memory !! So, my advice is you should try it, and forget about Java limitation of the JVM ! Benoît i'm having big problems with graphics dynamically created with tomcat on linux. on windows, the servlet works fine, on linux i have to start tomcat going to the server, starting X and then starting tomcat. i want to do this automatically and i want to connect tomcat to X windows without going to the server. did anybody solve this problem? it would help to get a working startup script for tomcat including the connection to a running X. thanks, michael
Re: tomcat + linux + graphics
One solution is to use the Xvfb (virtual X frame buffer) to avoid having to run a full blown X server on your box. On Fri, 4 May 2001, Michael Weissenbacher wrote: i'm having big problems with graphics dynamically created with tomcat on linux. on windows, the servlet works fine, on linux i have to start tomcat going to the server, starting X and then starting tomcat. i want to do this automatically and i want to connect tomcat to X windows without going to the server. did anybody solve this problem? it would help to get a working startup script for tomcat including the connection to a running X.
Re: tomcat + linux + graphics
According to the current specs for JDK1.4, this issue should become a thing of the past (see 'Headless' Java proposal). But then, JDK1.4 isn't available yet... so you'll need to wait a bit for that solution... -Chris - Original Message - From: Benoit Jacquemont [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, May 04, 2001 11:26 AM Subject: Re: tomcat + linux + graphics Hi, I had the same problem some time ago. I need to generate graphics with AWT and due to problem with JVM, I needed to install a X server. The first solution that came to my mind was to start an xterm after launching the X server in the rc.local with a -e option to launch a script running tomcat. So I had a X server that consume memory and CPU on a Web server that do not need any graphics interface... Then I found a library that replace some AWT classes and allow you to generate graphics without any X server running !! The package is a GNU one, it's called PJA and you can download it from the following website: http://www.eteks.com So, I installed this package (no need to recompile, just some add to the java command line of tomcat), removed the X server from my web server, and save disk space, save CPU ressource and freed a lot of memory !! So, my advice is you should try it, and forget about Java limitation of the JVM ! Benoît i'm having big problems with graphics dynamically created with tomcat on linux. on windows, the servlet works fine, on linux i have to start tomcat going to the server, starting X and then starting tomcat. i want to do this automatically and i want to connect tomcat to X windows without going to the server. did anybody solve this problem? it would help to get a working startup script for tomcat including the connection to a running X. thanks, michael
RE: tomcat + linux + graphics
I also ran into that problem. There is a freeware/opensource program available that emulates the X-server, called Xvbf. It works for me. So you don't need a full blown X-server and save the CPU and memory overhead it consumes. Wouter -Original Message- From: chris brown [mailto:[EMAIL PROTECTED]] Sent: 04 May 2001 13:58 To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: tomcat + linux + graphics According to the current specs for JDK1.4, this issue should become a thing of the past (see 'Headless' Java proposal). But then, JDK1.4 isn't available yet... so you'll need to wait a bit for that solution... -Chris - Original Message - From: Benoit Jacquemont [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, May 04, 2001 11:26 AM Subject: Re: tomcat + linux + graphics Hi, I had the same problem some time ago. I need to generate graphics with AWT and due to problem with JVM, I needed to install a X server. The first solution that came to my mind was to start an xterm after launching the X server in the rc.local with a -e option to launch a script running tomcat. So I had a X server that consume memory and CPU on a Web server that do not need any graphics interface... Then I found a library that replace some AWT classes and allow you to generate graphics without any X server running !! The package is a GNU one, it's called PJA and you can download it from the following website: http://www.eteks.com So, I installed this package (no need to recompile, just some add to the java command line of tomcat), removed the X server from my web server, and save disk space, save CPU ressource and freed a lot of memory !! So, my advice is you should try it, and forget about Java limitation of the JVM ! Benoît i'm having big problems with graphics dynamically created with tomcat on linux. on windows, the servlet works fine, on linux i have to start tomcat going to the server, starting X and then starting tomcat. i want to do this automatically and i want to connect tomcat to X windows without going to the server. did anybody solve this problem? it would help to get a working startup script for tomcat including the connection to a running X. thanks, michael
