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57 lines
2.0 KiB
57 lines
2.0 KiB
"""Module implementing error-catching version of send (sendRobust)"""
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from pydispatch.dispatcher import Any, Anonymous, liveReceivers, getAllReceivers
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from pydispatch.robustapply import robustApply
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def sendRobust(
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signal=Any,
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sender=Anonymous,
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*arguments, **named
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):
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"""Send signal from sender to all connected receivers catching errors
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signal -- (hashable) signal value, see connect for details
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sender -- the sender of the signal
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if Any, only receivers registered for Any will receive
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the message.
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if Anonymous, only receivers registered to receive
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messages from Anonymous or Any will receive the message
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Otherwise can be any python object (normally one
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registered with a connect if you actually want
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something to occur).
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arguments -- positional arguments which will be passed to
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*all* receivers. Note that this may raise TypeErrors
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if the receivers do not allow the particular arguments.
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Note also that arguments are applied before named
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arguments, so they should be used with care.
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named -- named arguments which will be filtered according
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to the parameters of the receivers to only provide those
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acceptable to the receiver.
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Return a list of tuple pairs [(receiver, response), ... ]
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if any receiver raises an error (specifically any subclass of Exception),
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the error instance is returned as the result for that receiver.
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"""
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# Call each receiver with whatever arguments it can accept.
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# Return a list of tuple pairs [(receiver, response), ... ].
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responses = []
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for receiver in liveReceivers(getAllReceivers(sender, signal)):
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try:
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response = robustApply(
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receiver,
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signal=signal,
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sender=sender,
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*arguments,
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**named
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)
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except Exception as err:
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responses.append((receiver, err))
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else:
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responses.append((receiver, response))
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return responses
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