1

ruoyi-system/src/main/java/com/ruoyi/system/mapper/ClientDeviceMapper.java

@@ -6,8 +6,10 @@ import java.util.List;
 public interface ClientDeviceMapper {
     ClientDevice selectByDeviceId(String deviceId);
     List<ClientDevice> selectByUsername(String username);
+    List<ClientDevice> selectOnlineDevices();
     int insert(ClientDevice device);
     int updateByDeviceId(ClientDevice device);
+    int updateExpiredDevicesOffline();
     int deleteByDeviceId(String deviceId);
     int countByUsername(String username);
 }

ruoyi-system/src/main/resources/mapper/system/ClientDeviceMapper.xml

@@ -48,6 +48,15 @@
     <select id="countByUsername" resultType="int">
         select count(1) from client_device where username = #{username}
     </select>
+
+    <select id="selectOnlineDevices" resultMap="ClientDeviceMap">
+        select * from client_device where status = 'online' order by last_active_at desc
+    </select>
+
+    <update id="updateExpiredDevicesOffline">
+        update client_device set status = 'offline'
+        where status = 'online' and (last_active_at is null or last_active_at &lt; date_sub(now(), interval 2 minute))
+    </update>
 </mapper>