JProgressBar - monitoring progress of a method in another Object.

Question

Hi all,
I've been three days trying to make a JProgressBar work. I know how to use them but not in this case. I'll try to explain the code instead of making you read it.
-I have a JProgressBar in a JDialog.
-In the constructor of this class I create a new instance of a Object, call it Processor for example, and i run a method start() on it.
-This method execute a number of SQL statment and i want to monitor them in the JProgressBar.
I've followed the official tutorial but it doesnt work for me, I have no idea how to do it beacause i don't know how to refresh the Task process property from outside the doInBackgroundMethod. I also tried to create 2 SwingWorker, run the Processor.run() in one of them, an in run() update a "satic int progress" in each iteration, then from the other SwingWorker i check the Procesor.progress to invoke the setProgress() method.
I have realised that when debugging sometime it works, so i supposed is something about concurrency, I don't know, please help.
Thank you in advanced.

Answer 1

the processor is a runnable, right? then:
MyDialog extends JDialog{
private final JProgressBar progressBar= new JProgressBar()
MyDialog(){...}
private void init(){
new SwingWorker<Void,Object>(){
public Void doInBackground(){
String sql1=...
Object o = execute sql1
publish(o);
... do the same with other sql queries
return null;
public void process(List<Object> chunks){
//update progressbar
//this method will be called using coalescence, so maybe you execute 3 queries, and this method gets called just once, and in this case 'chunks.size()==3'
public void done(){
//make sure that the progress is complete, the last chunks may have not been processed through process() method
progressBar.setValue(100%) // I dont remember the syntax for this
Edited by: thrawnkb on Jun 3, 2009 3:36 PM