利用redis缓存锁记录，数据库锁行

public ResultBean issue(String originID, final Long userID, final String fromIp) {
    try {
        if (!cacheSessionStorage.lock(ISSUING_LOCK + userID)) {
            return ResultBean.failed(Result.GLOBAL.FAIL.getCode(), "由于当前正在提现申请等原因，提现额度可能发生变化，发标失败，请稍后重试。");
        }
        Subject subjectDraft = subjectDraftDAO.getByOriginID(originID);
        int limitCategory = subjectDraft.getLimitCategory().intValue();
        if (LimitCategory.NET_VALUE.getType() == limitCategory) {
            return issueNetValue(originID, userID, fromIp);
        } else if (LimitCategory.CREDIT_LIMIT.getType() == limitCategory) {
            return issueCredit(originID, userID, fromIp);
        } else if (LimitCategory.FAST_LIMIT.getType() == limitCategory
                || LimitCategory.SPECIFIC.getType() == limitCategory
                || LimitCategory.DISCUSS.getType() == limitCategory
                || LimitCategory.ESSENCE.getType() == limitCategory
                || LimitCategory.GONGXIN.getType() == limitCategory) {
            return issueFastLoan(originID, userID, fromIp);
        } else if (LimitCategory.ASSETS_LIMIT.getType() == limitCategory) {
            return issueAssets(originID, userID, fromIp);
        } else {
            throw new UserException(BeanCode.GLOBAL.FAIL.getCode(), "发标类型不存在！");
        }
    }catch (Exception e){
        throw new UserException(BeanCode.GLOBAL.FAIL.getCode(), e.getMessage());
    }finally {
        cacheSessionStorage.unlock(ISSUING_LOCK + userID);
    }
}


2.除了使用redis锁行，还有利用数据库行锁，如果要锁的表比较大，而且只是记录一个业务操作，
通常使用中间表，表示这个业务状态，加行锁。