def ShouldRetry(self, exception):
        """Returns true if should retry based on the passed-in exception.

        :param (errors.HTTPFailure instance) exception:

        :rtype:
            boolean

        """
        if self.current_retry_attempt_count < self._max_retry_attempt_count:
            self.current_retry_attempt_count += 1
            self.retry_after_in_milliseconds = 0
                
            if self._fixed_retry_interval_in_milliseconds:
                self.retry_after_in_milliseconds = self._fixed_retry_interval_in_milliseconds
            elif http_constants.HttpHeaders.RetryAfterInMilliseconds in exception.headers:
                self.retry_after_in_milliseconds = int(exception.headers[http_constants.HttpHeaders.RetryAfterInMilliseconds])
                
            if self.cummulative_wait_time_in_milliseconds < self._max_wait_time_in_milliseconds:
                self.cummulative_wait_time_in_milliseconds += self.retry_after_in_milliseconds
                return True
            
        return False
Returns true if should retry based on the passed-in exception.

        :param (errors.HTTPFailure instance) exception:

        :rtype:
            boolean