场景记录
累积活跃度奖励
场景概述
给定某 N 个槽位用于领奖（比如累积活跃度奖励），支持按周增量更新配置奖励内容及奖励条件。
配置结构
| reward_id |
from_week_id |
need_active_num |
rewards |
| 1 |
1 |
2 |
aaa |
| 2 |
1 |
4 |
bbb |
| 3 |
1 |
8 |
ccc |
| 4 |
1 |
16 |
ddd |
| 5 |
1 |
32 |
eee |
| 6 |
1 |
64 |
fff |
| 2 |
5 |
4 |
bbb’ |
详细说明
有 6 个奖励项（N = 6），每个奖励项从第一周开始存在奖励配置。例如第一周开始，要求 reward_id(1) 的奖励项达成条件是 need_active_num 达到 2；reward_id(3) 的奖励达成条件是 need_active_num 达到 8。从第 5 周开始，奖励项 reward_id(2) 的奖励条件由 need_active_num 的 4 保持为 4，而奖励发生了变更。如何支持配置的索引结构来高效支持这样的频繁查询？需要支持至少以下两种功能接口：
-
const WeeklyActiveRewardConf *GetWeeklyActiveRewardConf(std::uint32_t reward_id, std::uint32_t week_id) 按照给定周的给定奖励项，获取得到相应的奖励项配置。
-
const std::vector<const WeeklyActiveRewardConf *> &GetWeeklyActiveRewardConf(std::uint32_t week_id) 按照给定周来获取当前周所有的奖励项配置。比如上述从第五周开始，调用此方法得到的配置项的奖励列表应当是 aaa、bbb'、ccc、ddd、eee 和 fff。
实现代码
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| static const std::uint32_t max_reward_num = 6U;
for (const auto &reward_conf : WeeklyActiveRewardConfVector::GetInst().GetConfAll())
{
if (weekly_active_reward_conf_.find(reward_conf.from_week_id) == weekly_active_reward_conf_.end())
{
weekly_active_reward_conf_[reward_conf.from_week_id] =
std::vector<const WeeklyActiveRewardConf *>(max_reward_num, nullptr);
}
CHECK_EXP_ELOG(reward_conf.reward_id <= 0U || reward_conf.reward_id > max_reward_num, continue,
"invalid reward_id|must from 0 to %u|reward_id:%u", max_reward_num, reward_conf.reward_id);
weekly_active_reward_conf_[reward_conf.from_week_id][reward_conf.reward_id - 1UL] = &reward_conf;
}
for (auto iter = weekly_active_reward_conf_.begin(); iter != weekly_active_reward_conf_.end(); ++iter)
{
for (std::size_t i = 0UL; i < iter->second.size(); ++i)
{
CHECK_EXP(iter->second[i] != nullptr, continue);
if (iter == weekly_active_reward_conf_.begin())
{
ERR_LOG(0UL, "no reward config|week_id:%u|reward_id:%zu", iter->first, i + 1UL);
return false;
}
else
{
iter->second[i] = std::prev(iter)->second[i];
}
}
}
|
利用这样的缓存的 weekly_active_reward_conf_ 数据，可以满足上述需求。对此的两个接口定义为：
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| const WeeklyActiveRewardConf *GetWeeklyActiveRewardConf(std::uint32_t reward_id, std::uint32_t week_id) const
{
COND_RET(weekly_active_reward_conf_.empty(), nullptr);
auto iter = weekly_active_reward_conf_.upper_bound(week_id);
COND_RET(iter == weekly_active_reward_conf_.begin(), nullptr);
const auto &conf_vec = std::prev(iter)->second;
COND_RET(reward_id <= 0 || reward_id > conf_vec.size(), nullptr);
return conf_vec[reward_id - 1U];
}
|
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| const std::vector<const WeeklyActiveRewardConf *> &GetWeeklyActiveRewardConf(std::uint32_t week_id) const
{
static std::vector<const WeeklyActiveRewardConf *> empty;
COND_RET(weekly_active_reward_conf_.empty(), empty);
auto iter = weekly_active_reward_conf_.upper_bound(week_id);
COND_RET(iter == weekly_active_reward_conf_.end(), empty);
return std::prev(iter)->second;
}
|
