54 lines
1.3 KiB
Python
54 lines
1.3 KiB
Python
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# coding=utf-8
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"""
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@project: qabot
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@Author：虎
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@file： lock.py
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@date：2023/9/11 11:45
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@desc:
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"""
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from datetime import timedelta
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from django.core.cache import caches
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memory_cache = caches['default']
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def try_lock(key: str, timeout=None):
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"""
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获取锁
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:param key: 获取锁 key
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:param timeout 超时时间
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:return: 是否获取到锁
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"""
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return memory_cache.add(key, 'lock', timeout=timedelta(hours=1).total_seconds() if timeout is not None else timeout)
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def un_lock(key: str):
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"""
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解锁
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:param key: 解锁 key
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:return: 是否解锁成功
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"""
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return memory_cache.delete(key)
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def lock(lock_key):
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"""
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给一个函数上锁
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:param lock_key: 上锁key 字符串|函数 函数返回值为字符串
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:return: 装饰器函数 当前装饰器主要限制一个key只能一个线程去调用 相同key只能阻塞等待上一个任务执行完毕 不同key不需要等待
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"""
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def inner(func):
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def run(*args, **kwargs):
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key = lock_key(*args, **kwargs) if callable(lock_key) else lock_key
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try:
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if try_lock(key=key):
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return func(*args, **kwargs)
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finally:
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un_lock(key=key)
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return run
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return inner
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