RateLimiter ? ConcurrentHashMap ?????

????????????RateLimiter ? Guava ????????????????????? ConcurrentHashMap??????????????????????????????????

????????

RateLimiter ???????????????????????????????????????????????????????????????????????????????????????????????????????????

ConcurrentHashMap ???

ConcurrentHashMap ???????? HashMap ?????????????????????????????????????????????????????????????

?????????

??????????????????????

?? ConcurrentHashMap ??

? Controller ??????? ConcurrentHashMap ????????????????

private final static Map
    
      outMoneyLimitMap = new ConcurrentHashMap<>();

??????

??????????????? ID ? ConcurrentHashMap ?????? RateLimiter??????????????????????????????

public ModelAndView submitOut() {
    RateLimiter rateLimiter = null;
    if (!outMoneyLimitMap.containsKey(uid)) {
        logger.debug("???uid");
        rateLimiter = RateLimiter.create(0.1);
        outMoneyLimitMap.put(uid, rateLimiter);
    } else {
        logger.debug("????uid");
        rateLimiter = outMoneyLimitMap.get(uid);
    }
    if (!rateLimiter.tryAcquire()) {
        throw new OrderException("??????");
    }
    // ??????

?????????

?? RateLimiter.create() ??????????????????????????0.1 ??? 10 ???????????

rateLimiter = RateLimiter.create(0.1);

?????????

?? rateLimiter.tryAcquire() ???????????????????????????????????????????????????????

???????

?????????????????????????????????????????????????????????????????????????? 0.1 ?????????????

???? RateLimiter ? ConcurrentHashMap??????????????????????????????????

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