[abbot-users] Problems with System.exit

[Jean-Francois P. <jfp...@ya...>]

Hello,

Actually I don't have any problem any more. But I just
want to write what has been a nightmare for me for the
past week, so that others can avoid the same issue.

My application quits through a call to System.exit
(yes I know it it not good practice, but I will not
change it now, I also believe that many people still
use this practice in their Swing applications).

When using costello to record/replay scripts, I had no
problems.

However, when I wanted to use JUnit with Ant to run my
GUI tests, problems had started. That was very
strange: ant would launch my GUI tests (I could them
performed up to the end) but at the end, no report was
generated!
At the beginning I thought it was a classpath problem,
so I investigated in this direction but could find
nothing!
Then I used Eclipse debugger and discovered that the
application (ant's JUnitTestRunner.main) was exitting
in a prematurate way! 
Since I was suspecting Eclipse debugger to have an
impact on the results, I then used jdb (!!!) to
further debug the problem in command-line. The strange
thing was that once my application would call
System.exit, the abbot's NoExitSecurityManager would
catch it and throw an exception, BUT right after it
the exit was still performed!
Then I mrembered having read somewhere (in abbot
Mailing List) something like "System.exit in the AWT
thread is evil". So I decided to check that point
immediately by putting the call to System.exit into a
Thread (just for checking): that solved the problem!

So my conclusion is: Don't call System.exit() from the
AWT Event Dispatch Thread!
If you cannot afford -like me- to quit your
application in a clean way (ie without System.exit),
then call System.exit but ensure that, if you are in
the AWT Thread, you create and start another Thread
that would call System.exit.

Note: besides problems with Abbot/JUnit/Ant, I don't
know if System.exit from the AWT Thread has other
issues, can someone comment on that?

Cheers

Jean-Francois


	

	
		
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