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I have chased this issue up with Sun and the issue will be resolved in the
Java release codenamed Merlin, due around Aug 2001. It is an issue with
the Java Foundation Classes which don't allow the use of graphics libs
without initalising an X session.
Just have to be patient for now....
Regards, Mark
"Bill Volk" <[EMAIL PROTECTED]> on 02/19/2001 12:51:49 PM
Please respond to "Java Apache Users"
<[EMAIL PROTECTED]>
To: "Java Apache Users" <[EMAIL PROTECTED]>
cc:
Subject: RE: [Fwd: sinking X11 connections]
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BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
WHEN YOU POST, include all relevant version numbers, log files,
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----------------------------------------------------------------
How does this help me with server-side rendering on a server weher we DON'T
want to install or run X?
Yes, I know about PJA ... No, it doesn't work for us. In fact I don't know
of anyone it's worked for.
How about just a JPEG save/load?
Bill
> -----Original Message-----
> From: [EMAIL PROTECTED]
> Java Apache Users wrote:
> >
> > >
> > >I've been reading the stuff going back and forth about server
> side image
> > >processing.
> > >
> > >The display dependency in the Java graphics libs is a classic
> issue going
> > back
> > >to the very beginning, and can be a royal pain in the rear if you're
> > running a
> > >secure, headless server and don't want it makig X connections to the
> > outside
> > >world.
> > >
> > >An alternative to restricting your choice of libs to something that
> > doesn't use
> > >AWT/Swing (which seem to be the culprits) is to just get something
that
> > will
> > >sink the X connection on the server side - it's doesn't need
> to be a very
> > full
> > >implementation of X, and I considered concoting one, but found
> VNC to be
> > a
> > >highly suitable alternative. We actually use it in production for this
> > purpose.
> > >
> > > http://www.uk.research.att.com/vnc/
> > >
> > >What is VNC? It's a "screen-scraper" type remote display
> technology, very
> > like
> > >Symantec pcAnywhere, except it's open source and cross platform. The
> > interesting
> > >thing is the way the Unix version of the server works; rather than
> > scraping the
> > >actual video display, it leverages the inherent capability of X to
> > support
> > >multiple displays on a single server and creates an entirely
> new, virtual
> > X
> > >display. To set it up to sink X, just install the server code as per
> > >instructions, and start it like this:
> > >
> > > vncserver :1
> > >
> > >To get your JServ VM to use it, it needs to have DISPLAY=:1.0 in its
> > >environment.
> > >
> > >If you use ApJServMaunal Off, you need to add this to jserv.properties
> > >
> > > wrapper.env=DISPLAY=:1.0
> > >
> > >If you use ApJServManual On, add this in your script:
> > >
> > > DISPLAY=:1.0 ; export DISPLAY # assumes sh or derivative
> > >
> > >Enjoy
> > >Dave
> > >>
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