me too, may be its because of the way I'm calling the chain: return ( self.abc1(). addErrback(self.handleFailure1). addCallback(self.abc2,args). addCallback(self.abc3). addErrback(self.handleFailure2) ) I see no call to self.handleFailure1() at all, abc1() just fail on exception (if it was raised). Quoting "Valeriy Pogrebitskiy" <vpogrebi@verizon.net>:
I am confused... If an exception is being raised in adc1() - errback is supposed to be called and passed your Exception instance (wrapped up as an instance of twisted.python.failure.Failure).
Kind regards,
Valeriy Pogrebitskiy Email: vpogrebi@iname.com
-----Original Message----- From: twisted-python-bounces@twistedmatrix.com [mailto:twisted-python-bounces@twistedmatrix.com] On Behalf Of vitaly@synapticvision.com Sent: Thursday, October 22, 2009 2:02 PM To: twisted-python@twistedmatrix.com Subject: Re: [Twisted-Python] How to chain deferred calls
Thank you for response.
the issue is if adc1() will raise up an exception, than following it .addErrback() will never be called cause adc1() will exit or raise Exception.
Quoting "Valeriy Pogrebitskiy" <vpogrebi@verizon.net>:
Add another .addErrback() directly after adc1() - to handle that specific exception...
Kind regards,
Valeriy Pogrebitskiy vpogrebi@verizon.net
On Oct 21, 2009, at 4:12 PM, vitaly@synapticvision.com wrote:
hi, how can I chain in defer methods that could raise exception while showing the exception that coming from method? I mean, if I'll do: return ( adc1().abc2().abc3().addErrback("Common2AllException") ) than "Common2AllException" will be raised if abc1() raise Exception, but I'd like to see the adc1() own exception (and not "Common2AllException") ?
t = Test() def abc1(self): if t.test() is None: raise Exception("Error11") else: return 1
def abc2(self): if t.test() is None: raise Exception("Error12") else: return 1
def abc3(self): if t.test() is None: raise Exception("Error13") else: return 1
Appreciate the help.
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