[jbpm-dev] human task exceptions

Mauricio Salatino salaboy at gmail.com
Fri May 11 07:43:16 EDT 2012


Any ideas?

On Thu, May 10, 2012 at 4:20 PM, Mauricio Salatino <salaboy at gmail.com>wrote:

> Hi guys,
> I was reviewing the Human Task Module and more specifically the HornetQ
> implementation.
> I was writing some tests to check the behavior after a logical failure in
> the server side and I reach a point where some design questions appear:
>
> The following line tries to start a task which doesn't exist in the server:
>
> client.start(3, "");
>
> Where client is -> TaskService.
>
> This leads to a Runtime Exception in the client side with a clear message:
> "Command OperationRequest faild due to No Task with ID 3 was found!.
> Please contact task server administrator."  <-- not sure about the
> administrator part
>
> I understand that we are throwing a Runtime Exception to be able to not
> declare the exception inside the TaskService interface, but...
> For real implementations the user will be forced to do the following:
>
>       try{
>             client.start(3, "");
>         }catch(Exception e){
>               assertEquals("Command OperationRequest faild due to No Task
> with ID 3 was found!. Please contact task server administrator.",
> e.getMessage());
>               // or notify the UI about the error using that message.
>         }
> No matter the method that the user calls in the client UIs the try/catch
> block will need to be included in order to not break the app.
> So my question is: we already have the TaskException class which extends
> RuntimeException, there are not too many implementations, but we surely can
> add
> the TaskPersistence exception, logical exceptions, etc.
> In my perspective adding the exception to both interfaces (TaskService and
> AsyncTaskService) will provide a more clear approach to the users that in
> the end will
> need to add the try catch no matter why.
>
> In my opinion, this is just the first step of providing our clients a way
> to notify the errors to their UIs.
>
> Looking forward for your comments and feedback!
>
> Cheers
>
> --
>  - MyJourney @ http://salaboy.wordpress.com
>  - Co-Founder @ http://www.jugargentina.org
>  - Co-Founder @ http://www.jbug.com.ar
>
>  - Salatino "Salaboy" Mauricio -
>
>


-- 
 - MyJourney @ http://salaboy.wordpress.com
 - Co-Founder @ http://www.jugargentina.org
 - Co-Founder @ http://www.jbug.com.ar

 - Salatino "Salaboy" Mauricio -
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