JDK-7 SwingWorker deadlocks?
- by kd304
I have a small image processing application which does multiple things at once using SwingWorker. However, if I run the following code (oversimplified excerpt), it just hangs on JDK 7 b70 (windows) but works in 6u16. It starts a new worker within another worker and waits for its result (the real app runs multiple sub-workers and waits for all this way). Did I use some wrong patterns here (as mostly there is 3-5 workers in the swingworker-pool, which has limit of 10 I think)?
import javax.swing.SwingUtilities;
import javax.swing.SwingWorker;
public class Swing {
static SwingWorker<String, Void> getWorker2() {
return new SwingWorker<String, Void>() {
@Override
protected String doInBackground() throws Exception {
return "Hello World";
}
};
}
static void runWorker() {
SwingWorker<String, Void> worker
= new SwingWorker<String, Void>() {
@Override
protected String doInBackground() throws Exception {
SwingWorker<String, Void> sw2 = getWorker2();
sw2.execute();
return sw2.get();
}
};
worker.execute();
try {
System.out.println(worker.get());
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
runWorker();
}
});
}
}
