How should I cancel this thread ?

[playwin2]

Thread exeQ suppose to load and display a picture from database.. during it's execution user sees a progressbar and a "Cancel" button... I want to cancel the thread as user press the button... so the question is how should I cancel/stop the following thread ....

Code:

Thread t = new exeQ("theName");
t.start();

And the Thread exeQ is

Code:

class execQ extends Thread
    {
        String DBpicName = "";
        boolean success;
        Exception x;

        public execQ(String picName)
        {
            DBpicName = picName;
        }

        @Override
        public void run()
        {
            //System.out.println("Pic - EDT: " + javax.swing.SwingUtilities.isEventDispatchThread());
            success = true;
            x = null;
            try
            {
                //Get the requested Image from DB....

                Statement stmt = con.createStatement();
                ResultSet rs = stmt.executeQuery("SELECT PIC FROM Mypic WHERE NAME='" + DBpicName + "'");

                //Store the picture in bytes...
                //Move the ResultSet pointer at the 1st. record...
                rs.next();
                //Get the pic...
                thePicBuffer = rs.getBytes(1);

                rs.close();
                stmt.close();
                rs = null;
                stmt = null;
            }
            catch(Exception e)
            {
                success = false;
                x = e;
                System.err.println(x);
            }

            java.awt.EventQueue.invokeLater(GUItask);
        }
        
        Runnable GUItask = new Runnable()
        {

            public void run()
            {
                //System.out.println("Pic gui - EDT: " + javax.swing.SwingUtilities.isEventDispatchThread());
                 // hide the ProgDlg...
                dlg.setVisible(false);
                dlg.dispose();
                if(success)
                {
                    //Create the Image and display...
                    lblImg.setIcon(new javax.swing.ImageIcon(thePicBuffer));
                }
                else
                {
                    showErr(x.toString());
                }
            }
        };
    }

[playwin2]

No one got any clue

[Norm]

If the thread doesn't have any forever loops, where is it hanging and not exiting the thread?
If there were a loop, use a boolean that is set outside the thread and tested for inside to know to exit the loop and the thread.

[playwin2]

Hello thanks for responding...

Quote:

Originally Posted by Norm

If the thread doesn't have any forever loops, where is it hanging and not exiting the thread?

No no the thread isn't hanging at all... I just want to add the "cancel execution feature" to this thread.

Quote:

Originally Posted by Norm

If there were a loop, use a boolean that is set outside the thread and tested for inside to know to exit the loop and the thread.

Exactly but the problem is there are no loops inside the thread, and the stop() method is depreciated now. So what to do here

[Norm]

Why isn't the thread exiting quickly enough for you?
Whereever it is stalling out, there is where you need to be able to tell it to quit and exit.

[playwin2]

Hmm! well I can think of the following line :

Code:

//Get the pic...
thePicBuffer = rs.getBytes(1);

I think I have to do loops here .... what do you think?

BTW what about SwingWorker ? as far as I remember it has a cancel() method, and it's also now part of java 6.

[masijade]

interrupt and catch (InterruptedException)

[playwin2]

Ah! I just forgot about the thing interrupt .... I guess.
(For past few weeks I'm constantly switching lang.)

Yes that might do the magic.. Thank you, thank you , thank you very much.