fix(ops): 修复区域设备索引缓存问题并优化查询性能

1. 修复 listAvailableBadges() 读穿透 bug
   - 改用 areaDeviceService.getDeviceIdsByArea() 获取设备列表
   - 缓存未命中时自动从数据库重建

2. 优化 N+1 查询问题
   - listBadgesByArea() 和 listAvailableBadges() 使用 batchGetBadgeStatus() 批量查询

3. 简化 BadgeDeviceStatusServiceImpl
   - 移除重复的 AREA_BADGES_KEY_PREFIX 常量
   - 区域索引操作委托给 AreaDeviceService 处理

4. 增强缓存可靠性
   - getDeviceIdsByArea() 支持读穿透缓存
   - 缓存 TTL 从 30 分钟延长到 24 小时

Co-Authored-By: Claude (MiniMax-M2.1) <noreply@anthropic.com>

viewsh-module-ops/viewsh-module-ops-biz/src/main/java/com/viewsh/module/ops/service/area/AreaDeviceService.java

@@ -64,6 +64,14 @@ public interface AreaDeviceService {
      */
     void refreshAreaDeviceIndex();
 
+    /**
+     * 获取区域下的设备ID列表（带读穿透缓存）
+     *
+     * @param areaId 区域ID
+     * @return 设备ID集合
+     */
+    java.util.Set<Long> getDeviceIdsByArea(Long areaId);
+
     /**
      * 添加设备到区域索引
      *

viewsh-module-ops/viewsh-module-ops-biz/src/main/java/com/viewsh/module/ops/service/area/AreaDeviceServiceImpl.java

@@ -14,6 +14,7 @@ import org.springframework.stereotype.Service;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 
 /**
  * 区域设备关联服务实现
@@ -63,9 +64,10 @@ public class AreaDeviceServiceImpl implements AreaDeviceService, InitializingBea
     private static final String NULL_CACHE = "NULL";
 
     /**
-     * 缓存 TTL（30 分钟）
+     * 缓存 TTL（24 小时）
+     * 区域设备关系相对静态，可以设置较长过期时间
      */
-    private static final int CACHE_TTL_MINUTES = 30;
+    private static final int CACHE_TTL_HOURS = 24;
 
     @Override
     public void afterPropertiesSet() {
@@ -108,7 +110,8 @@ public class AreaDeviceServiceImpl implements AreaDeviceService, InitializingBea
         }
 
         // 从数据库查询
-        List<OpsAreaDeviceRelationDO> relations = relationMapper.selectListByAreaIdAndRelationType(areaId, relationType);
+        List<OpsAreaDeviceRelationDO> relations = relationMapper.selectListByAreaIdAndRelationType(areaId,
+                relationType);
 
         // 返回第一个启用的
         OpsAreaDeviceRelationDO relation = relations.stream()
@@ -123,9 +126,8 @@ public class AreaDeviceServiceImpl implements AreaDeviceService, InitializingBea
                 stringRedisTemplate.opsForValue().set(
                         cacheKey,
                         JsonUtils.toJsonString(dto),
-                        CACHE_TTL_MINUTES,
-                        TimeUnit.MINUTES
-                );
+                        CACHE_TTL_HOURS,
+                        TimeUnit.HOURS);
             } else {
                 // 空值缓存，防止穿透
                 stringRedisTemplate.opsForValue().set(cacheKey, NULL_CACHE, 1, TimeUnit.MINUTES);
@@ -169,9 +171,8 @@ public class AreaDeviceServiceImpl implements AreaDeviceService, InitializingBea
                 stringRedisTemplate.opsForValue().set(
                         cacheKey,
                         JsonUtils.toJsonString(dto),
-                        CACHE_TTL_MINUTES,
-                        TimeUnit.MINUTES
-                );
+                        CACHE_TTL_HOURS,
+                        TimeUnit.HOURS);
             } else {
                 // 空值缓存，防止穿透
                 stringRedisTemplate.opsForValue().set(cacheKey, NULL_CACHE, 1, TimeUnit.MINUTES);
@@ -213,6 +214,45 @@ public class AreaDeviceServiceImpl implements AreaDeviceService, InitializingBea
         initAreaDeviceIndex();
     }
 
+    @Override
+    public Set<Long> getDeviceIdsByArea(Long areaId) {
+        if (areaId == null) {
+            return Set.of();
+        }
+
+        String areaKey = AREA_BADGES_KEY_PREFIX + areaId;
+        try {
+            Set<Object> members = redisTemplate.opsForSet().members(areaKey);
+            if (members != null && !members.isEmpty()) {
+                return members.stream()
+                        .map(m -> Long.parseLong(m.toString()))
+                        .collect(Collectors.toSet());
+            }
+
+            // 缓存未命中，读穿透从数据库重构
+            log.info("[AreaDevice] 区域索引缓存未命中，从数据库重建：areaId={}", areaId);
+            List<OpsAreaDeviceRelationDO> relations = relationMapper.selectListByAreaIdAndRelationType(areaId, "BADGE");
+
+            Set<Long> deviceIds = relations.stream()
+                    .filter(OpsAreaDeviceRelationDO::getEnabled)
+                    .map(OpsAreaDeviceRelationDO::getDeviceId)
+                    .collect(Collectors.toSet());
+
+            if (!deviceIds.isEmpty()) {
+                // 写入缓存
+                String[] idStrings = deviceIds.stream().map(Object::toString).toArray(String[]::new);
+                redisTemplate.opsForSet().add(areaKey, (Object[]) idStrings);
+                redisTemplate.expire(areaKey, CACHE_TTL_HOURS, TimeUnit.HOURS);
+            }
+
+            return deviceIds;
+
+        } catch (Exception e) {
+            log.error("[AreaDevice] 获取区域设备索引失败：areaId={}", areaId, e);
+            return Set.of();
+        }
+    }
+
     @Override
     public void addToAreaIndex(Long deviceId, Long areaId) {
         if (deviceId == null || areaId == null) {
@@ -222,7 +262,8 @@ public class AreaDeviceServiceImpl implements AreaDeviceService, InitializingBea
         try {
             String areaKey = AREA_BADGES_KEY_PREFIX + areaId;
             redisTemplate.opsForSet().add(areaKey, deviceId.toString());
-            redisTemplate.expire(areaKey, CACHE_TTL_MINUTES, TimeUnit.MINUTES);
+            // 延长过期时间到 24 小时
+            redisTemplate.expire(areaKey, CACHE_TTL_HOURS, TimeUnit.HOURS);
             log.debug("[AreaDevice] 添加设备到区域索引：deviceId={}, areaId={}", deviceId, areaId);
         } catch (Exception e) {
             log.error("[AreaDevice] 添加设备到区域索引失败：deviceId={}, areaId={}", deviceId, areaId, e);