Re: Handling exceptions in SwingWorker

Efi Merdler wrote:
Rogan Dawes wrote:
Michael Rauscher wrote:
Efi Merdler wrote:
Hello,
I didn't find any information on this subject.
Let's assume that I have an exception while running my background
method, what are my available options :
1. Handle the exception from within the background method, sometimes
not possible especially if it requires handling GUI.
2. Create a getter method called getException() that returns the
exception if one exists and null if none exists.
OK, I'd like to add some possibilities:

3. Use a global 'ErrorManager'

4. Create an 'ExceptionListener' and a method addExceptionListener

5. Use a combination of 3 and 4

Bye
Michael
6. Extend SwingWorker to have both a done() and exception(Exception e)
method, both of which are called on the EDT. Depending on requirements,
you may want both methods to be called if an Exception occurs, or the
exception() method could chain to the done() method.

7. Catch the exception in your worker method, and set the return value
to the exception. In your done() method, check if you get an instance of
Exception and handle it appropriately.

Rogan

Great !
How do you call a method on the EDT, do you use
SwingUtilities.InvokeLater(new Runner(...
exception(e));

?

Thanks,
Efi


I'd take a careful look at the source for SwingWorker. The concurrency issues here are quite severe, it seems. It took 3 or more revisions of SwingWorker by seasoned practitioners before it became robust . . .

Rogan
.

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