exception.py 文件源码

def wrap_exception(notifier=None, event_type=None):
    """This decorator wraps a method to catch any exceptions.

    It logs the exception as well as optionally sending
    it to the notification system.
    """
    def inner(f):
        def wrapped(self, context, *args, **kwargs):
            # Don't store self or context in the payload, it now seems to
            # contain confidential information.
            try:
                return f(self, context, *args, **kwargs)
            except Exception as e:
                with excutils.save_and_reraise_exception():
                    if notifier:
                        call_dict = inspect.getcallargs(f, self, context,
                                                        *args, **kwargs)
                        payload = dict(exception=e,
                                       private=dict(args=call_dict)
                                       )

                        temp_type = event_type
                        if not temp_type:
                            # If f has multiple decorators, they must use
                            # functools.wraps to ensure the name is
                            # propagated.
                            temp_type = f.__name__

                        notifier.error(context, temp_type, payload)

        return functools.wraps(f)(wrapped)
    return inner