题目库存检查

src/main/java/com/project/exam/domain/service/impl/AssemblePaperDomainServiceImpl.java

@@ -10,6 +10,7 @@ import com.project.question.domain.dto.TaskKnowledgePointDTO;
 import com.project.question.domain.entity.QuestionEntity;
 import com.project.question.domain.entity.TaskKnowledgePointEntity;
 import com.project.question.domain.enums.QuestionUseStatusEnum;
+import com.project.question.domain.service.QuestionInventoryDomainService;
 import com.project.question.domain.service.TaskKnowledgePointBaseService;
 import com.project.question.mapper.QuestionKpRelMapper;
 import com.project.question.mapper.QuestionMapper;
@@ -24,16 +25,18 @@ import com.project.exam.domain.service.ExamRecordBaseService;
 import com.project.task.domain.service.TaskBaseService;
 import com.project.task.domain.service.TaskUserBaseService;
 import io.vavr.control.Try;
+import jakarta.annotation.Resource;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.support.TransactionSynchronization;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
+
 import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.*;
-import java.util.concurrent.ThreadLocalRandom;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.stream.Collectors;
 
@@ -71,11 +74,17 @@ public class AssemblePaperDomainServiceImpl implements AssemblePaperDomainServic
 
     private static final String EXAM_START_LOCK = "lock:exam:start:%s:%s";
 
+    @Resource(name = "taskInternalExecutor")
+    private Executor taskInternalExecutor;
+    @Autowired
+    private QuestionInventoryDomainService questionInventoryDomainService;
+
 
 
     @Override
     @Transactional(rollbackFor = Exception.class)
     public ExamRecordDTO assemblePaper(Long taskId, String userId) throws Exception {
+
         // 校验是否已通过考核
         TaskUserDTO taskUserDTO = Try.of(() -> taskUserBaseService.getOne(new LambdaQueryWrapper<TaskUserEntity>()
                         .eq(TaskUserEntity::getTaskId, taskId).eq(TaskUserEntity::getUserId, userId))
@@ -118,7 +127,19 @@ public class AssemblePaperDomainServiceImpl implements AssemblePaperDomainServic
         if (selectedQuestionList.size() < totalQuestionNum) {
             throw new BusinessErrorException("当前题库可用题目不足，请联系管理员补货");
         }
-        // todo 异步起一个检测库存
+        // 注册一个回调：在当前事务 commit 成功后，再触发异步补库
+        TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() {
+            @Override
+            public void afterCommit() {
+                CompletableFuture.runAsync(() -> {
+                    try {
+                        questionInventoryDomainService.checkAndReplenish(taskId);
+                    } catch (Exception e) {
+                        log.error(">>> [自动补库] 异步检查失败, taskId: {}", taskId, e);
+                    }
+                }, taskInternalExecutor);
+            }
+        });
 
         // 持久化记录
         ExamRecordDTO recordDTO = new ExamRecordDTO();

src/main/java/com/project/interaction/domain/service/impl/SaveClusterDomainServiceImpl.java

@@ -84,7 +84,7 @@ public class SaveClusterDomainServiceImpl implements SaveClusterDomainService {
             if (clusterEntity.getClusterSize() > 1) {
                 // 簇生成目标量
                 int clusterTargetNum = (int) Math.ceil(1.2 * u * clusterEntity.getClusterSize());
-                generateQuestionDomainService.produce(clusterEntity.getId(), QuestionTypeEnum.MULTIPLE_CHOICE ,QuestionSourceTypeEnum.Multi_Concept  , clusterTargetNum);
+                generateQuestionDomainService.produce(clusterEntity.getId(), QuestionTypeEnum.MULTIPLE_CHOICE , QuestionSourceTypeEnum.Multi_Concept  , clusterTargetNum);
             }
         }
     }

src/main/java/com/project/question/domain/service/QuestionInventoryDomainService.java

@@ -0,0 +1,5 @@
+package com.project.question.domain.service;
+
+public interface QuestionInventoryDomainService {
+    void checkAndReplenish(Long taskId) throws Exception;
+}

src/main/java/com/project/question/domain/service/impl/QuestionInventoryDomainServiceImpl.java

@@ -0,0 +1,105 @@
+package com.project.question.domain.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.project.question.domain.entity.TaskKnowledgeClusterEntity;
+import com.project.question.domain.entity.TaskKnowledgePointEntity;
+import com.project.question.domain.enums.QuestionSourceTypeEnum;
+import com.project.question.domain.service.GenerateQuestionDomainService;
+import com.project.question.domain.service.QuestionInventoryDomainService;
+import com.project.question.mapper.QuestionKpRelMapper;
+import com.project.question.mapper.TaskKnowledgeClusterMapper;
+import com.project.question.mapper.TaskKnowledgePointMapper;
+import com.project.task.domain.entity.TaskEntity;
+import com.project.task.domain.enums.QuestionTypeEnum;
+import com.project.task.mapper.TaskMapper;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.Date;
+import java.util.List;
+
+@Service
+@Slf4j
+public class QuestionInventoryDomainServiceImpl implements QuestionInventoryDomainService {
+    @Autowired
+    private TaskKnowledgePointMapper taskKpMapper;
+
+    @Autowired
+    private TaskKnowledgeClusterMapper clusterMapper;
+
+    @Autowired
+    private QuestionKpRelMapper questionKpMapper;
+
+    @Autowired
+    private TaskMapper taskMapper;
+
+    @Autowired
+    private GenerateQuestionDomainService generateQuestionDomainService;
+
+    @Override
+    public void checkAndReplenish(Long taskId) {
+        TaskEntity task = taskMapper.selectById(taskId);
+        if (task == null || task.getEndTime().before(new Date())) {
+            return;
+        }
+        int u = (task.getParticipantNum() == null ? 0 : task.getParticipantNum())
+                - (task.getPassNum() == null ? 0 : task.getPassNum());
+        if (u <= 0) {
+            return;
+        }
+        int watermark = (int) Math.ceil(1.0 * u);
+        int targetLine = (int) Math.ceil(1.2 * u);
+        // 针对每个知识点遍历每种题型
+        List<TaskKnowledgePointEntity> kpList = taskKpMapper.selectList(
+                new LambdaQueryWrapper<TaskKnowledgePointEntity>().eq(TaskKnowledgePointEntity::getTaskId , taskId));
+        for (TaskKnowledgePointEntity kp : kpList) {
+            for (QuestionTypeEnum questionType : QuestionTypeEnum.values()) {
+                checkAndProduce(kp.getId() , questionType , watermark , targetLine);
+            }
+        }
+        // 针对每一个簇
+        List<TaskKnowledgeClusterEntity> clusterList = clusterMapper.selectList(
+                new LambdaQueryWrapper<TaskKnowledgeClusterEntity>().eq(TaskKnowledgeClusterEntity::getTaskId, taskId));
+
+        for (TaskKnowledgeClusterEntity cluster : clusterList) {
+            int w = cluster.getClusterSize();
+            // 簇水位线: 1.0 * U * W
+            int clusterWatermark = watermark * w;
+            // 簇目标线: 1.2 * U * W
+            int clusterTargetLine = targetLine * w;
+
+            checkClusterProduce(cluster.getId(), clusterWatermark, clusterTargetLine);
+        }
+
+    }
+
+    /**
+     * 单知识点补货判定
+     */
+    private void checkAndProduce(Long kpId, QuestionTypeEnum type, int watermark , int targetLine) {
+        int currentStock = questionKpMapper.countAvailableByKp(kpId, type.getValue());
+
+        if (currentStock < watermark) {
+            int gap = targetLine - currentStock;
+            log.info(">>> [自动补库] KP: {}, 题型: {}, 当前库存: {}, 需补货: {}", kpId, type.getDescription(), currentStock, gap);
+            // 触发异步生产逻辑 (内部带 30 分钟冷却锁)
+            generateQuestionDomainService.produce(kpId , type ,  QuestionSourceTypeEnum.Single_Concept , gap);
+        }
+    }
+
+    /**
+     * 知识点簇补货判定
+     */
+    private void checkClusterProduce(Long clusterId, int watermark, int targetLine) {
+        int currentStock = questionKpMapper.countAvailableByCluster(clusterId);
+
+        if (currentStock < watermark) {
+            int gap = targetLine - currentStock;
+            log.info(">>> [自动补库] 簇: {}, 类型: 复合多选, 当前库存: {}, 需补货: {}", clusterId, currentStock, gap);
+            // 簇维度触发，触发异步生产逻辑
+            generateQuestionDomainService.produce(clusterId , QuestionTypeEnum.MULTIPLE_CHOICE ,  QuestionSourceTypeEnum.Single_Concept , gap);
+        }
+    }
+
+}

src/main/java/com/project/question/mapper/QuestionKpRelMapper.java

@@ -18,8 +18,34 @@ public interface QuestionKpRelMapper extends BaseMapper<QuestionKpRelEntity> {
             "FROM evaluator_question_kp_rel r " +
             "INNER JOIN evaluator_question q ON r.question_id = q.id " +
             "WHERE r.kp_id = #{kpId} " +
-            "  AND q.question_type = #{type} " + // 增加题型过滤
+            "  AND q.question_type = #{type} " +
             "  AND q.use_status = 0 " +
             "  AND q.deleted = 0")
     List<Long> findAvailableIdsByKpAndType(@Param("kpId") Long kpId, @Param("type") Integer type);
+
+    /**
+     * 情况 A：统计单知识点（KP）下的可用库存
+     * 用于单选题、判断题、单点多选题的补货判定
+     */
+    @Select("SELECT COUNT(DISTINCT r.question_id) " +
+            "FROM evaluator_question_kp_rel r " +
+            "INNER JOIN evaluator_question q ON r.question_id = q.id " +
+            "WHERE r.kp_id = #{kpId} " +
+            "  AND q.question_type = #{type} " +
+            "  AND q.use_status = 0 " +
+            "  AND q.deleted = 0")
+    int countAvailableByKp(@Param("kpId") Long kpId, @Param("type") Integer type);
+
+    /**
+     * 情况 B：统计知识点簇（Cluster）下的可用库存
+     * 用于复合多选题（Cluster 维度）的补货判定
+     */
+    @Select("SELECT COUNT(DISTINCT r.question_id) " +
+            "FROM evaluator_question_kp_rel r " +
+            "INNER JOIN evaluator_question q ON r.question_id = q.id " +
+            "WHERE r.cluster_id = #{clusterId} " +
+            "  AND q.question_type = 2 " + // 2 代表多选题 QuestionTypeEnum.MULTIPLE_CHOICE
+            "  AND q.use_status = 0 " +
+            "  AND q.deleted = 0")
+    int countAvailableByCluster(@Param("clusterId") Long clusterId);
 }

src/main/java/com/project/task/config/TaskAsyncThreadPoolConfig.java

@@ -17,7 +17,7 @@ public class TaskAsyncThreadPoolConfig {
     public Executor taskInternalExecutor() {
         ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
         executor.setCorePoolSize(1);
-        executor.setMaxPoolSize(4);
+        executor.setMaxPoolSize(5);
         executor.setQueueCapacity(20);
         executor.setThreadNamePrefix("task-init-");
         executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());