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From Jeremias Maerki <dev.jerem...@greenmail.ch>
Subject Re: Running FOP 'headless' FAQ
Date Tue, 01 Jul 2003 16:08:24 GMT

On 01.07.2003 17:50:24 Clay Leeds wrote:
> On 7/1/2003 8:22 AM, Clay Leeds wrote:
> > This is just a guess, but perhaps you're running FOP headless (there's 
> > no monitor?). This FAQ might provide a workaround:
> > 
> > http://xml.apache.org/fop/graphics.html#batik
> I have a question or two about the "headless" FAQ. This's only mentioned 
> in the Graphics/Batik section. However, the quote says:
> ===
> Batik must be run in a graphical environment. It uses AWT classes for 
> rendering SVG, which in turn require an X server on Unixish systems. If 
> you run a server without X, or if you can't connect to the X server due 
> to security restrictions or policies (a so-called "headless" 
> environment), SVG rendering will fail.
> ===
> Unless I'm reading this wrong, this means the "headless" problem is 
> directly related to AWT, and because Batik "uses AWT classes for 
> rendering SVG" it is also indirectly affected. Am I correct? 


> If so, 
> should the "headless" FAQ really be in an AWT section, and the Batik 
> section provide a reference to the AWT headless issue, rather than the 
> current way it's shown?

That may be better. Wanna send a patch?

> BTW, the FAQ shows the first workaround as:
> ===
> If you are using JDK 1.4, start it with the -Djava.awt.headless=true 
> command line option.
> ===
> Is that supposed to be "-D java.awt.headless=true" ?


> On a somewhat-related issue, since I tend to run FOP from the command 
> line interface (CLI), I'm always interested in the arguments I can pass 
> through via the CLI. I haven't seen the above CLI argument documented 
> anywhere. What other CLI args are there which aren't documented in the 
> "help" which is displayed if you don't pass FOP the correct args?

That particular option is an option from the JDK itself. It's not a FOP
feature. See: http://java.sun.com/j2se/1.4.1/docs/guide/awt/AWTChanges.html#headless

Jeremias Maerki

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