73 lines
2.5 KiB
Python
73 lines
2.5 KiB
Python
"""
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django使用redis的过期回调通知-商城订单过期取消
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注意：uwsgi部署需要开启enable-threads=true支持多线程
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"""
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from django_redis import get_redis_connection
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import time
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from apps.mall.models import OrderInfo
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import logging
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logger = logging.getLogger(__name__)
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import random
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import threading
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# 连接redis数据库
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client = get_redis_connection('carts')
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# 创建pubsub对象，该对象订阅一个频道并侦听新消息：
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pubsub = client.pubsub()
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# 定义触发事件
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def event_handler(msg):
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# print('Handler', msg)
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# print(msg['data'].decode('utf-8'))
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logger.info("收到商城订单redis过期回调：%s"%msg)
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if msg:
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thedata = str(msg['data']).split("mallorderexpire_")
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if len(thedata) == 2:
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orderid = thedata[1]
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# 获取订单对象
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order = OrderInfo.objects.filter(id=orderid).first()
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if order:
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# 判断用户是否已经付款
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if str(order.status) == "1":#待付款状态
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# 取消订单,更改订单状态
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OrderInfo.objects.filter(id=orderid).update(status="6")
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# 获取订单中的所有商品
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goods = order.ordergoodsskus.all()
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# 遍历商品
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for good in goods:
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# 获取订单中的商品数量
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count = good.count
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# print(count)
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# 获取sku商品
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sku = good.sku
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# 将库存重新增加到sku的stock中去
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sku.stock += count
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# 从销量中减去已经取消的数量
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sku.sales -= count
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sku.save()
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spu = goods.sku.spu
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spu.sales -= count
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spu.save()
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logger.info("已处理收到商城订单redis过期回调：%s"%msg)
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#订阅redis键空间通知
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pubsub.psubscribe(**{'__keyevent@3__:expired': event_handler})
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def sub():
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# 死循环,不停的接收订阅的通知
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while True:
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message = pubsub.get_message()
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if message:
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# print(message)
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pass
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else:
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time.sleep(0.01)
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t = threading.Thread(target=sub) #一般把此代码放在 apps.py ready方法中 在django启动时自动启动
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t.daemon = True #设置为守护线程 因为django 在启动时会执行检查代码和启动程序，当主进程杀死时,该线程结束
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t.start()
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