Redis冲冲冲——Redis分布式锁如何实现，2024年最新腾讯T3大牛亲自讲解

import redis
import time
import uuid

def acquire_lock(conn, lock_name, acquire_timeout=10, lock_timeout=10):
    identifier = str(uuid.uuid4())
    end = time.time() + acquire_timeout

    while time.time() < end:
        if conn.setnx(lock_name, identifier):
            conn.expire(lock_name, lock_timeout)
            return identifier
        time.sleep(0.001)

    return False

def release_lock(conn, lock_name, identifier):
    pipe = conn.pipeline(True)
    while True:
        try:
            pipe.watch(lock_name)
            if pipe.get(lock_name) == identifier:
                pipe.multi()
                pipe.delete(lock_name)
                pipe.execute()
                return True
            pipe.unwatch()
            break
        except redis.exceptions.WatchError:
            pass
    return False

# 使用示例
redis_conn = redis.StrictRedis(host='localhost', port=6379, db=0)
lock_name = "my_lock"
lock_identifier = acquire_lock(redis_conn, lock_name)
if lock_identifier:
    try:
        # 在这里执行被锁保护的代码
        print("Lock acquired")
    finally:
        if release_lock(redis_conn, lock_name, lock_identifier):
            print("Lock released")
        else:
            print("Unable to release lock")
else:
    print("Unable to acquire lock")