分布式架构数据库年末活动

from distributed_transaction import DistributedTransaction

def process_order(order_id):
    with DistributedTransaction() as tx:
        try:
            # 执行数据库操作
            save_order_to_db(order_id, tx)
            update_inventory(order_id, tx)
            commit_transaction(tx)
        except Exception as e:
            rollback_transaction(tx)
            raise e

import redis

r = redis.Redis(host='localhost', port=6379, db=0)

def get_user_info(user_id):
    user_info = r.get(f'user:{user_id}')
    if user_info is None:
        user_info = fetch_user_info_from_db(user_id)
        r.setex(f'user:{user_id}', 3600, user_info)
    return user_info

import time
import socket

def check_node_health(node_address):
    try:
        start_time = time.time()
        sock = socket.create_connection(node_address, timeout=5)
        sock.close()
        if time.time() - start_time < 5:
            return True
    except socket.error:
        pass
    return False