23 lines
692 B
Java
23 lines
692 B
Java
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package io.as.modules.daycard.dao;
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import com.baomidou.mybatisplus.core.mapper.BaseMapper;
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import io.as.modules.daycard.entity.DayCardPoolEntity;
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import org.apache.ibatis.annotations.Mapper;
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import org.apache.ibatis.annotations.Param;
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/**
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* 天卡池
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*/
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@Mapper
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public interface DayCardPoolDao extends BaseMapper<DayCardPoolEntity> {
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/**
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* 使用 SELECT ... FOR UPDATE SKIP LOCKED 抢占一张未使用的天卡，
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* 避免多线程/多实例并发下单时分配到同一张卡。
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* <p>天卡池为通用池，不再按 partner 过滤</p>
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*
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* @return 被当前事务锁定的可用天卡行，无可用时返回 null
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*/
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DayCardPoolEntity selectOneForUpdateSkipLocked();
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}
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