Backgroundrb devel - Jun 2009 - Exception Handling

Hi folks!
I''m still starting with BackgroundRB and I wonder if it is possible to
to put some kind of exception handling (begin/rescue etc.) around each  
method in my worker.

In the example below I want to make sure that the whole method could  
be processed correctly before I commit the data in the database.
Of course I don''t want to write the begin-rescue idiom in every method
(DRY). Is there some kind of hook/callback that I''m missing?

Sample:

class TransferWorker < BackgrounDRb::MetaWorker
  set_worker_name :transfer_worker


  def request_transfer_from_registry

   begin
    ActiveRecord::Base.transaction do
      transfer = Order::OrderTransfer.new(:xml => args[:xml])
      transfer.fetch_from_xml_by_id
    end
   rescue Exception => e
    #notify whomever...
   end

  end

end


Regards,

Tobias

I ended up creating a ''RobustWorker'', which all our workers
subclass.
Then the methods use notify_on_failure :tries => 5 do work; end

That method runs the block in a begin rescue, up to five times,  
sending me an email if it is never successful. Of course, any db work  
should be done in a transaction.

HTH

Adam Williams

On Jun 23, 2009, at 6:27 AM, Tobias Overkamp <tov-backgroundrb at
overkamp.org
 > wrote:
> Hi folks!
> I''m still starting with BackgroundRB and I wonder if it is
possible
> to to put some kind of exception handling (begin/rescue etc.) around  
> each method in my worker.
>
> In the example below I want to make sure that the whole method could  
> be processed correctly before I commit the data in the database.
> Of course I don''t want to write the begin-rescue idiom in every  
> method (DRY). Is there some kind of hook/callback that I''m
missing?
>
> Sample:
>
> class TransferWorker < BackgrounDRb::MetaWorker
> set_worker_name :transfer_worker
>
>
> def request_transfer_from_registry
>
>  begin
>   ActiveRecord::Base.transaction do
>     transfer = Order::OrderTransfer.new(:xml => args[:xml])
>     transfer.fetch_from_xml_by_id
>   end
>  rescue Exception => e
>   #notify whomever...
>  end
>
> end
>
> end
>
>
> Regards,
>
> Tobias
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