How to programmatically determine if in headless mode..?
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I'm working on an issue with the Parallel Computing Toolbox (PCT)..
As each MATLAB.exe worker thread process is initialized, startup.m is executed. All worker threads are "headless" (no output window). Certain graphics-related function calls that are fine-- when launched within the full MATLAB app with its output capability-- can cause problems in the headless context.
I have a graphics-related function that's very convenient to have in the full MATLAB app's startup.m, but mustn't execute in the PCT worker thread context. Is there a function call I can insert into startup.m to determine if its MATLAB.exe process is running in headless mode? I would like to use as follows:
% Is there an output window associated with this MATLAB.exe process?
if ~isInHeadlessMode()
% YES : render graphics window
someGraphicsFunction();
end
Any help appreciated, Thanks, Brad
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Edric Ellis
2012-1-16
One option is to check:
java.lang.System.getProperty( 'java.awt.headless' )
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Edric Ellis
2012-1-18
FWIW, "usejava('desktop')" is fine for most purposes, but it's not quite the same thing - for example, if you run MATLAB in "-nodesktop" mode (as I do most of the time), then it will give you the wrong answer - you can still produce graphics in "-nodesktop" mode. Oh, and I'm a MathWorker too ;)
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