Listener to control the change of the circuit state

[sergioave]

I would like to know if you have in the roadmap the implementation of some kind of listener to control the state changes of the circuits, I think it is very interesting and especially useful for metric control.

Would you be open to any kind of contribution?.

We have been develop a first version using inheritance.

def state_change(self, old_state, new_state):
    # Called when the circuit breaker state changes.
    pass

def before_callfunc(self, func,  *args, **kwargs):
    # Called before the circuit breaker decorated function has been called
    pass

def succes(self):
    # Called when the circuit breaker decorated function finished ok"
    pass

def failure(self, exc_type, exc_value, _traceback):
    # Called when the circuit breaker decorated function finished with selected exception"
    pass

Best regards

[ramykl]

I've been looking for something like this as well. Would be great to be able to send notifications when a circuit changes state for monitoring purposes...

[eliasdorneles]

Just in case, I noticed that there is a competing library called pybreaker that implements that feature: https://github.com/danielfm/pybreaker#event-listening

EDIT: the other library doesn't seem to support coroutines, this one does!

[sergioave]

Just in case, I noticed that there is a competing library called pybreaker that implements that feature: https://github.com/danielfm/pybreaker#event-listening

EDIT: the other library doesn't seem to support coroutines, this one does!

The interface we have been testing to contribute is similar to pybreaker but instead of listener we use inheritance.