Waiting for a cancelled future to actually finish

Question

I have a SwingWorker which calls some code that does not check for thread interruption. After the call to worker.cancel(true), the worker.ge

Answer 1

Inspired by the solution by Paul Blessing I improved it a little to become a class, you can subclass to get the desired funcitonality:

class AwaitingWorker extends SwingWorker {

    private final CountDownLatch actuallyFinishedLatch = new CountDownLatch(1);

    /**
     * Override this to do something useful
     */
    protected abstract void performOperation();

    @Override
    protected final T doInBackground() throws Exception {
        try {
            return performOperation();
        } finally {
            actuallyFinishedLatch.countDown();
        }
    }

    public void awaitActualCompletion() throws InterruptedException {
        actuallyFinishedLatch.await();
    }

}