[IGSTK-Developers] IGSTK - error handling

[Ziv Yaniv]

Hi all,

Cutting to the chase:
How do I handle errors that occur in an IGSTK component at the 
application level?

Going back to the tracker classes (Aurora):
The interface exposed to the outside world does not enable status 
checking by the application, no GetStatus() method to see what's up with 
the internal state machine, and all methods are declared as void XXX(), 
so no return value.

Let us say an application wants to initialize a tracker, if this fails 
the application user should be alerted. With the current interface I 
cannot know if initialization succeeded or failed. The only way to find 
out is through a hack (thanks Patrick), using  the GetNumberOfTools() 
which should be greater than zero if things are ok, but as I said this 
is a hack and not a solution.

Does IGSTK have a systematic approach to reporting errors/request 
denials to the outside application, and if not what are the plans for this?

              please advise
                   Ziv

P.S. While I raise this issue for the tracking classes I assume the 
situation is similar across IGSTK.


-- 
Ziv Yaniv, PhD., Research Assistant Professor
Imaging Science and Information Systems (ISIS) Center
Department of Radiology
Georgetown University Medical Center
2115 Wisconsin Avenue, Suite 603
Washington, DC, 20007,

Phone: +1-202-687-2902
Fax: +1-202-784-3479
email: zivy at isis.imac.georgetown.edu
web: http://isiswiki.georgetown.edu/zivy/