Re: threadpool and ui paint

From:
markspace <markspace@nospam.nospam>
Newsgroups:
comp.lang.java.programmer
Date:
Tue, 13 May 2014 09:35:45 -0700
Message-ID:
<lkthl3$h9u$1@dont-email.me>
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 = ?K.
      }

}

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