def send(self, sender, **named):
"""
Send signal from sender to all connected receivers.
If any receiver raises an error, the error propagates back through send,
terminating the dispatch loop, so it is quite possible to not have all
receivers called if a raises an error.
Arguments:
sender
The sender of the signal Either a specific object or None.
named
Named arguments which will be passed to receivers.
Return nothing
"""
if not self.receivers:
return
task_args = {}
if 'task_args' in named:
task_args = named.pop('task_args')
for receiver in self._live_receivers(_make_id(sender)):
kwargs = {"receiver": receiver, "sender": sender }
kwargs.update(named)
SignalTask.apply_async(kwargs=kwargs, **task_args)
def send_robust(self, sender, **named):
"""
Send signal from sender to all connected receivers catching errors.
Arguments:
sender
The sender of the signal. Can be any python object (normally one
registered with a connect if you actually want something to
occur).
named
Named arguments which will be passed to receivers. These
arguments must be a subset of the argument names defined in
providing_args.
Return nothing
"""
if not self.receivers:
return
# Call each receiver with whatever arguments it can accept.
# Return a list of tuple pairs [(receiver, response), ... ].
for receiver in self._live_receivers(_make_id(sender)):
try:
SignalTask.delay(receiver=receiver, sender=sender, **named)
except Exception, err:
pass
