Problem with" using java.awt library in linux X11 display problem"

Processing Forum

yaxuan.yu..

Problem with" using java.awt library in linux X11 display problem"

in Integration and Hardware • 1 year ago

Hey guys...I met a very annoying problem while I am trying to put a program integrated Processing on a tomcat server...I checked many solutions about this. Most of them is saying that the applet on the server side is so-called heavy weight component...But I can't shift them into client side cause I just want processing to make a picture and then send this to the client.

So I think I didn't call the applet display or some interactive operations..I don't know why I have this problem "using java.awt library in linux X11 display problem"..So if I change the tomcat setting as most of people said "-DJava.awt.headless=true", it will get into another error..Both errors show that there is a problem in Papplet.java 244 lines in the source code of processing:

static public final int MENU_SHORTCUT = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();

Can somebody help me , I got stuck here like ages.......

Replies(2)

yaxuan.yu..

Re: Problem with" using java.awt library in linux X11 display problem"

1 year ago

For complementary...If I change it as most of the saying on website..

setting:

export JAVA_OPTS = "${JAVA_OPTS} -Djava.awt.headless=true"

After setting this, the new error mesage is as follows

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: java.lang.ExceptionInInitializerError
	com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:387)
	com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:451)
	com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:632)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.ExceptionInInitializerError
	de.fhg.iais.kd.tm.quote.casReadWrite.CasAnnotationCollector.finishProcessing(CasAnnotationCollector.java:72)

PhiLho

Re: Problem with" using java.awt library in linux X11 display problem"

1 year ago

If you search the forum, you will find several threads on the topic of running Processing headless, on a server.
Basically, it isn't simple, as PApplet is an applet, an AWT component, made for display.
Perhaps you can use PGraphics (one instance of it, like PGraphicsJava2D) in a Java application.
Not sure if it works (some functions use parent which is the instance of the PApplet).

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