31 lines
1.1 KiB
Java
31 lines
1.1 KiB
Java
package com.label.mapper;
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import com.baomidou.mybatisplus.core.mapper.BaseMapper;
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import com.label.entity.AnnotationTask;
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import org.apache.ibatis.annotations.Mapper;
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import org.apache.ibatis.annotations.Param;
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import org.apache.ibatis.annotations.Update;
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/**
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* annotation_task 表 Mapper。
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*/
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@Mapper
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public interface AnnotationTaskMapper extends BaseMapper<AnnotationTask> {
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/**
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* 原子性领取任务：仅当任务为 UNCLAIMED 且属于当前租户时才更新。
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* 使用乐观 WHERE 条件实现并发安全（依赖数据库行级锁）。
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*
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* @param taskId 任务 ID
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* @param userId 领取用户 ID
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* @param companyId 当前租户
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* @return 影响行数（0 = 任务已被他人领取或不存在）
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*/
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@Update("UPDATE annotation_task " +
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"SET status = 'IN_PROGRESS', claimed_by = #{userId}, claimed_at = NOW(), updated_at = NOW() " +
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"WHERE id = #{taskId} AND status = 'UNCLAIMED' AND company_id = #{companyId}")
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int claimTask(@Param("taskId") Long taskId,
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@Param("userId") Long userId,
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@Param("companyId") Long companyId);
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}
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