"""passbook app_gw cache clean signals"""
from logging import getLogger
from django.core.cache import cache
from django.db.models.signals import post_save
from django.dispatch import receiver
from passbook.app_gw.models import ApplicationGatewayProvider
from passbook.app_gw.proxy.handler import IGNORED_HOSTNAMES_KEY
LOGGER = getLogger(__name__)
@receiver(post_save)
# pylint: disable=unused-argument
def invalidate_app_gw_cache(sender, instance, **kwargs):
"""Invalidate Policy cache when app_gw is updated"""
if isinstance(instance, ApplicationGatewayProvider):
LOGGER.debug("Invalidating cache for ignored hostnames")
cache.delete(IGNORED_HOSTNAMES_KEY)
