study-video-time redis优化

servers/boe-server-all/src/main/java/com/xboe/school/study/api/StudyCourseTask.java

@@ -0,0 +1,98 @@
+package com.xboe.school.study.api;
+
+import com.xboe.school.study.service.IStudyService;
+import com.xxl.job.core.handler.annotation.XxlJob;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.redis.connection.RedisConnection;
+import org.springframework.data.redis.core.Cursor;
+import org.springframework.data.redis.core.ScanOptions;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.stereotype.Component;
+
+import java.util.Objects;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author by lyc
+ * @date 2025/3/3
+ */
+@Component
+@Slf4j
+@RequiredArgsConstructor
+public class StudyCourseTask {
+
+    private final IStudyService studyService;
+    private final StringRedisTemplate redisTemplate;
+
+    /**
+     * 定时任务
+     * 获取redis 中学习结束的数据更新入库
+     * */
+    @XxlJob("saveStudyCourseItemLastTime")
+    public void saveStudyCourseItemLastTime() {
+        // 1. 定义匹配模式（匹配所有目标key）
+        final String KEY_PATTERN = "studyContentId:*:last_active";
+
+        // 2. 使用SCAN安全遍历（避免阻塞）
+        ScanOptions options = ScanOptions.scanOptions()
+            .match(KEY_PATTERN)
+            .count(100) // 分页大小
+            .build();
+
+        try (RedisConnection connection = Objects.requireNonNull(redisTemplate.getConnectionFactory()).getConnection()) {
+            Cursor<byte[]> cursor = connection.scan(options);
+            // 3. 遍历处理符合条件的key
+            while (cursor.hasNext()) {
+                String redisKey = new String(cursor.next());
+                // 4. 获取剩余TTL（秒）
+                Long ttl = redisTemplate.getExpire(redisKey, TimeUnit.SECONDS);
+
+                // 5. 过滤条件：剩余时间 >= 29天23小时30分钟（转换为秒）
+                // 总需时间 = (30天 - 30分钟) = 29天23小时30分钟 = 2590200秒
+                if (ttl <= 2590200) {
+                    try {
+                        // 6. 提取studyContentId
+                        String[] parts = redisKey.split(":");
+                        if (parts.length < 2) continue;
+                        String studyContentId = parts[1];
+
+                        // 7. 获取存储的时间点（示例逻辑）
+                        String lastStudyTimeStr = redisTemplate.opsForValue().get(redisKey);
+                        if (lastStudyTimeStr == null) continue;
+                        int lastStudyTime = Integer.parseInt(lastStudyTimeStr);
+
+                        // 8. 更新数据库（调用已有服务方法）
+                        studyService.updateStudyCourseItemLastTime(studyContentId, lastStudyTime, "system_job");
+
+                        // 9. 删除Redis键（原子操作）
+                        redisTemplate.delete(redisKey);
+
+                        log.info("处理成功 key: {}, lastStudyTime: {}", redisKey, lastStudyTime);
+                    } catch (Exception e) {
+                        log.error("处理失败 key: {}", redisKey, e);
+                    }
+                }
+
+            }
+            cursor.close();
+        } catch (Exception e) {
+            log.error("定时任务执行异常", e);
+        }
+
+      /*  // 新增日志逻辑
+        if (ttl <= 172800) {
+            studyService.saveCourseExpireLog(
+                    studyContentId,
+                    lastStudyTime,
+                    redisKey,
+                    ttl,
+                    "system_job"
+            );
+        }*/
+
+    }
+
+
+
+}

servers/boe-server-all/src/main/java/com/xboe/school/study/service/IStudyService.java

@@ -99,4 +99,5 @@ public interface IStudyService {
 
     List<StudyCourseItem> getList(String courseId, String contentId, String name, Integer status);
 
+	void updateStudyCourseItemLastTime(String studyContentId, int lastStudyTime, String systemJob);
 }

servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyServiceImpl.java

@@ -1,5 +1,6 @@
 package com.xboe.school.study.service.impl;
 
+import java.time.Duration;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
@@ -15,6 +16,7 @@ import com.xboe.school.study.entity.StudyCourse;
 import com.xboe.system.user.entity.User;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Service;
 
 import com.xboe.common.OrderCondition;
@@ -51,7 +53,10 @@ public class StudyServiceImpl implements IStudyService{
 	
 	@Autowired
 	UserDao userDao;
-	
+	@Autowired
+	StringRedisTemplate redisTemplate;
+
+
 	@Override
 	public StudyCourseItem checkHas(String studyId,String contentId) {
 		List<StudyCourseItem> items = scItemDao.findList(FieldFilters.eq("studyId", studyId),FieldFilters.eq("contentId", contentId));
@@ -324,8 +329,20 @@ public class StudyServiceImpl implements IStudyService{
 
 	// 更新 前端传输已学习时长
 	@Override
-	@Transactional
 	public void updateLastTime(String studyContentId, int lastStudyTime,String aid) {
+		// 20250303 优化 多次更新改一次更新
+		// 更新Redis中的最后活跃时间（带30秒过期）
+		redisTemplate.opsForValue().set(
+				"studyContentId:" + studyContentId + ":last_active",
+                String.valueOf(lastStudyTime),
+				Duration.ofSeconds(2592000)
+		);
+//		Duration.ofDays(30)  也就是 2592000秒
+	}
+
+	@Override
+	@Transactional
+	public void updateStudyCourseItemLastTime(String studyContentId, int lastStudyTime,String aid) {
 		// 更新最后的学习时间点
 		LocalDateTime now=LocalDateTime.now();
 		UpdateBuilder update=UpdateBuilder.from(StudyCourseItem.class);
@@ -335,7 +352,6 @@ public class StudyServiceImpl implements IStudyService{
 		update.addUpdateField("lastStudyTime", lastStudyTime);
 		update.addUpdateField("lastTime", now);
 		scItemDao.update(update.builder());
-		//增加用户的学习时长,在api中调用
 	}
 
 	@Override