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Groups > comp.lang.java.programmer > #28455

Re: threadpool and ui paint

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On 5/13/2014 2:26 AM, Joerg Meier wrote:
> On Tue, 13 May 2014 09:35:09 +0200, Philipp Kraus wrote:
> 
>> class worker {
>>      void run()
>>      {
>>
>>       while (threadruns)
>>       {
>>            for all x = get object from queue
>>            {
>>               calculate x
>>               push x back to the finish queue
> 		SwingUtilities.invokeLater(new Runnable() {
>                     public void run() {
>                        swingJLabelOrWhatever.setText(x);
>                     }
>                  });
>>            }

However, this is broken if 'x' is mutable.  You can't mutate (change)
objects that are being accessed by more than one thread.  You'll need to
synchronize 'x', and that can be a lot of hassle.  The currency
tutorials barely scratch the surface.

I'm going to go out on a limb here and say M. Kraus isn't going to be
able to do that reliably, based on what we've seen from his posts.

I think M. Kraus is going to need to read the language spec, and get a
book called "Java Concurrency in Practice" by Brian Goetz.  After
researching those two thoroughly he might be able to design something
workable.

http://docs.oracle.com/javase/specs/jls/se8/html/jls-17.html

http://jcip.net.s3-website-us-east-1.amazonaws.com/

>>            - or here paint x -
>>
>>            thread await
>>
>>            for all y = ….
>>       }
>>
>> }

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Thread

threadpool and ui paint Philipp Kraus <philipp.kraus@flashpixx.de> - 2014-05-13 09:35 +0200
  Re: threadpool and ui paint Joerg Meier <joergmmeier@arcor.de> - 2014-05-13 11:26 +0200
    Re: threadpool and ui paint markspace <markspace@nospam.nospam> - 2014-05-13 09:35 -0700
  Re: threadpool and ui paint Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-05-13 08:10 -0400
    Re: threadpool and ui paint markspace <markspace@nospam.nospam> - 2014-05-13 09:45 -0700
      Re: threadpool and ui paint Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-05-13 13:22 -0400
        Re: threadpool and ui paint markspace <markspace@nospam.nospam> - 2014-05-13 10:46 -0700

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