JRuby script with Rubeus and Swing exiting once packaged into jar using warble

Question

I am trying to package a simple JRuby script into a jar file. The script uses Rubeus::Swing and runs correctly when executed with the JRuby interpreter.

Answer 1

Just set the appropriate flag:

System.setProperty("warbler.skip_system_exit","true");

Answer 2

Warbler calls System.exit() after your main script exits. This causes the Swing EventThread to exit, closing your app.

https://github.com/jruby/warbler/blob/master/ext/JarMain.java#L131

I worked around this problem by joining with the event thread at the bottom of my start script like so:

event_thread = nil
SwingUtilities.invokeAndWait { event_thread = java.lang.Thread.currentThread }
event_thread.join

Hacky, but it works.