Report a service check, tagged by the service and the backend.
            Statuses are defined in `STATUS_TO_SERVICE_CHECK` mapping.

def _process_service_check(
        self, data, url, tag_by_host=False, services_incl_filter=None, services_excl_filter=None, custom_tags=None
    ):
        ''' Report a service check, tagged by the service and the backend.
            Statuses are defined in `STATUS_TO_SERVICE_CHECK` mapping.
        '''
        custom_tags = [] if custom_tags is None else custom_tags
        service_name = data['pxname']
        status = data['status']
        haproxy_hostname = to_string(self.hostname)
        check_hostname = haproxy_hostname if tag_by_host else ''

        if self._is_service_excl_filtered(service_name, services_incl_filter, services_excl_filter):
            return

        if status in Services.STATUS_TO_SERVICE_CHECK:
            service_check_tags = ["service:%s" % service_name]
            service_check_tags.extend(custom_tags)
            hostname = data['svname']
            if data['back_or_front'] == Services.BACKEND:
                service_check_tags.append('backend:%s' % hostname)

            status = Services.STATUS_TO_SERVICE_CHECK[status]
            message = "%s reported %s:%s %s" % (haproxy_hostname, service_name, hostname, status)
            self.service_check(
                self.SERVICE_CHECK_NAME, status, message=message, hostname=check_hostname, tags=service_check_tags
            )