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# -*- coding: utf-8 -*-
#
from collections import defaultdict
from django.db.models.signals import post_save, m2m_changed, post_delete
from django.dispatch import receiver
from common.utils import get_logger
from common.decorator import on_transaction_commit
from .models import Asset, SystemUser, Node, AuthBook
from .tasks import (
update_assets_hardware_info_util,
test_asset_connectivity_util,
push_system_user_to_assets
)
logger = get_logger(__file__)
def update_asset_hardware_info_on_created(asset):
logger.debug("Update asset `{}` hardware info".format(asset))
update_assets_hardware_info_util.delay([asset])
def test_asset_conn_on_created(asset):
logger.debug("Test asset `{}` connectivity".format(asset))
test_asset_connectivity_util.delay([asset])
@receiver(post_save, sender=Asset, dispatch_uid="my_unique_identifier")
@on_transaction_commit
def on_asset_created_or_update(sender, instance=None, created=False, **kwargs):
if created:
logger.info("Asset `{}` create signal received".format(instance))
# 获取资产硬件信息
update_asset_hardware_info_on_created(instance)
test_asset_conn_on_created(instance)
# 过期节点资产数量
nodes = instance.nodes.all()
Node.expire_nodes_assets_amount(nodes)
@receiver(post_delete, sender=Asset, dispatch_uid="my_unique_identifier")
def on_asset_delete(sender, instance=None, **kwargs):
# 过期节点资产数量
nodes = instance.nodes.all()
Node.expire_nodes_assets_amount(nodes)
@receiver(post_save, sender=SystemUser, dispatch_uid="my_unique_identifier")
def on_system_user_update(sender, instance=None, created=True, **kwargs):
if instance and not created:
logger.info("System user `{}` update signal received".format(instance))
assets = instance.assets.all()
push_system_user_to_assets.delay(instance, assets)
# @receiver(m2m_changed, sender=SystemUser.nodes.through)
# def on_system_user_nodes_change(sender, instance=None, **kwargs):
# if instance and kwargs["action"] == "post_add":
# logger.info("System user `{}` nodes update signal received".format(instance))
# assets = set()
# nodes = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
# for node in nodes:
# assets.update(set(node.get_all_assets()))
# instance.assets.add(*tuple(assets))
#
@receiver(m2m_changed, sender=SystemUser.assets.through)
def on_system_user_assets_change(sender, instance=None, **kwargs):
if instance and kwargs["action"] == "post_add":
assets = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
push_system_user_to_assets.delay(instance, assets)
@receiver(m2m_changed, sender=Asset.nodes.through)
def on_asset_node_changed(sender, instance=None, **kwargs):
logger.debug("Asset nodes change signal received")
Asset.expire_all_nodes_keys_cache()
if isinstance(instance, Asset):
if kwargs['action'] == 'pre_remove':
nodes = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
Node.expire_nodes_assets_amount(nodes)
if kwargs['action'] == 'post_add':
nodes = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
Node.expire_nodes_assets_amount(nodes)
system_users_assets = defaultdict(set)
system_users = SystemUser.objects.filter(nodes__in=nodes)
# 清理节点缓存
for system_user in system_users:
system_users_assets[system_user].update({instance})
for system_user, assets in system_users_assets.items():
system_user.assets.add(*tuple(assets))
@receiver(m2m_changed, sender=Asset.nodes.through)
def on_node_assets_changed(sender, instance=None, **kwargs):
if isinstance(instance, Node):
logger.debug("Node assets change signal {} received".format(instance))
# 当节点和资产关系发生改变时，过期资产数量缓存
instance.expire_assets_amount()
assets = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
if kwargs['action'] == 'post_add':
# 重新关联系统用户和资产的关系
system_users = SystemUser.objects.filter(nodes=instance)
for system_user in system_users:
system_user.assets.add(*tuple(assets))
@receiver(post_save, sender=Node)
def on_node_update_or_created(sender, instance=None, created=False, **kwargs):
if instance and not created:
instance.expire_full_value()
@receiver(post_save, sender=AuthBook)
def on_auth_book_created(sender, instance=None, created=False, **kwargs):
if created:
logger.debug('Receive create auth book object signal.')
instance.set_version_and_latest()