Re: Aborting Interpretting

--- Patrick Niemeyer <[email protected]> wrote:

> 
> On Feb 14, 2005, at 10:33 AM, Alexey Zinger wrote:
> 
> > I thought one could simply terminate the thread it's running in.  I  
> > haven't
> > tried it though, but see no reason why this shouldn't work.  BSH  
> > doesn't keep
> > any state persisted on the hard drive that could get corrupted or  
> > anything like
> > that, right?
> 
> Script execution control will definitely be near the top of the list  
> for new features.
> 
> In the interum, if you just want a course grained "abort" button,  
> running the script in its own thread and using the deprecated Thread  
> stop() method will probably do exactly what you want.
> 
> The reasons that Java's Thread stop() method was deprecated are more  
> involved with fine grained recovery of locks and resources.  Normally  
> you can't just halt a thread in the middle of an activity and expect  
> synchronized code to come out in a consistent state.  With that said,  
> since each BeanShell interpreter is almost entirely self contained  
> (there are just a few ways to share static data across them) it  
> probably won't affect you unless you are doing some elaborate  
> application level synchronization between interpreters or between Java  
> and the script interpreter.
> 
> Here is Sun's FAQ on Thread deprecation:
> 
> http://java.sun.com/j2se/1.4.2/docs/guide/misc/ 
> threadPrimitiveDeprecation.html
> 
> So, in short - yes, using a Thread and stop() on your script is  
> probably a fine solution until we offer a better one (hopefully soon).
> 
> If anyone disagrees and thinks that Thread stop() is just totally evil  
> please feel free to chime in.
> 
> 
> Pat
> 
> 

Pat, my knee jerk reaction to having to stop a thread is to use
Thread.interrupt() method:
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Thread.html#interrupt() 
Seems to do the right thing and it's not deprecated.  But I haven't tried it
myself.  It's been a while since I needed to halt a thread and I did use
Thread.stop() back then as it wasn't deprecated.

=====
Alexey
Briggs & Stratton
1988 Kawasaki EX500 (CCS)
http://bsheet.sourceforge.net


		
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