Redis在金融領(lǐng)域中的應(yīng)用探索

import redis

def get_product_info(product_id):
    r = redis.Redis(host='localhost', port=6379, db=0)
    cache_key = f'product_info:{product_id}'
    product_info = r.get(cache_key)
    if product_info:
        return product_info
    else:
        # 從數(shù)據(jù)庫(kù)或其他數(shù)據(jù)源中獲取產(chǎn)品信息
        product_info = query_product_info_from_database(product_id)
        # 將產(chǎn)品信息寫入緩存
        r.set(cache_key, product_info, ex=3600)  # 設(shè)置緩存過(guò)期時(shí)間為1小時(shí)
        return product_info

def query_product_info_from_database(product_id):
    # 從數(shù)據(jù)庫(kù)中查詢產(chǎn)品信息
    pass

import redis
import threading

def process_trade_records():
    r = redis.Redis(host='localhost', port=6379, db=0)
    pubsub = r.pubsub()
    pubsub.subscribe('trade_records')

    for message in pubsub.listen():
        # 處理交易記錄，這里只打印消息
        print(message['data'])

def publish_trade_record(trade_record):
    r = redis.Redis(host='localhost', port=6379, db=0)
    r.publish('trade_records', trade_record)

# 啟動(dòng)處理交易記錄的線程
thread = threading.Thread(target=process_trade_records)
thread.start()

# 發(fā)布交易記錄消息
publish_trade_record('{"trade_id": "123456", "amount": "100.00"}')

import redis
import time
import threading

class DistributedLock:
    def __init__(self, name, timeout=10):
        self.name = name
        self.timeout = timeout
        self.unlock_script = """
            if redis.call("get", KEYS[1]) == ARGV[1] then
                return redis.call("del", KEYS[1])
            else
                return 0
            end
        """
    
    def acquire(self):
        r = redis.Redis(host='localhost', port=6379, db=0)
        while True:
            result = r.set(self.name, 'locked', nx=True, ex=self.timeout)
            if result:
                return True
            else:
                time.sleep(0.1)
    
    def release(self):
        r = redis.Redis(host='localhost', port=6379, db=0)
        r.eval(self.unlock_script, 1, self.name, 'locked')

def perform_transfer(user_id, amount):
    lock = DistributedLock(f'lock:user_{user_id}')
    if lock.acquire():
        try:
            # 執(zhí)行轉(zhuǎn)賬操作
            pass
        finally:
            lock.release()

# 并發(fā)執(zhí)行轉(zhuǎn)賬操作
threads = []
for i in range(10):
    thread = threading.Thread(target=perform_transfer, args=(i, 100))
    thread.start()
    threads.append(thread)

for thread in threads:
    thread.join()