Swing Worker

import org.apache.log4j.Logger;

import javax.swing.*;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;


public abstract class Worker {
    SwingWorker<Void, Void> worker = new SwingWorker<Void, Void>() {
        @Override
        protected Void doInBackground() throws Exception {
            Worker.this.doInBackground();
            return null;
        }
        @Override
        public final void done() {
            try {
                get();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            } catch (ExecutionException e) {
                throw new RuntimeException(e);
            } catch (CancellationException e) {
                cancelled();
            }
            afterDone();
        }
    };
    protected void cancelled() {
        Logger.getLogger(this.getClass()).error(toString() + " cancelled");
    }
    protected abstract void doInBackground() throws Exception;
    protected void afterDone() {
    }
    public final void execute() {
        worker.execute();
    }
    public final boolean isDone() {
        return worker.isDone();
    }
    public final void cancel(boolean interrupt) {
        worker.cancel(interrupt);
    }
}