feat(count): 实现关注与粉丝数统计功能

- 新增关注数与粉丝数 MQ 消费者
- 在用户关系服务中新增关注/取关时发送 MQ 消息逻辑
- 新增关注/取关类型枚举类
- 新增用于统计的 MQ 常量定义
- 调整应用主类包路径以符合项目结构（致命，查半天）
- 移除配置文件中不再使用的 MQ 消费者限流配置项

han-note-user-relation/han-note-user-relation-biz/src/main/java/com/hanserwei/hannote/user/relation/biz/constant/MQConstants.java

@@ -16,4 +16,14 @@ public interface MQConstants {
      * 取关标签
      */
     String TAG_UNFOLLOW = "Unfollow";
+
+    /**
+     * Topic: 关注数计数
+     */
+    String TOPIC_COUNT_FOLLOWING = "CountFollowingTopic";
+
+    /**
+     * Topic: 粉丝数计数
+     */
+    String TOPIC_COUNT_FANS = "CountFansTopic";
 }

han-note-user-relation/han-note-user-relation-biz/src/main/java/com/hanserwei/hannote/user/relation/biz/consumer/FollowUnfollowConsumer.java

@@ -7,6 +7,8 @@ import com.hanserwei.hannote.user.relation.biz.constant.MQConstants;
 import com.hanserwei.hannote.user.relation.biz.constant.RedisKeyConstants;
 import com.hanserwei.hannote.user.relation.biz.domain.dataobject.FansDO;
 import com.hanserwei.hannote.user.relation.biz.domain.dataobject.FollowingDO;
+import com.hanserwei.hannote.user.relation.biz.enums.FollowUnfollowTypeEnum;
+import com.hanserwei.hannote.user.relation.biz.model.dto.CountFollowUnfollowMqDTO;
 import com.hanserwei.hannote.user.relation.biz.model.dto.FollowUserMqDTO;
 import com.hanserwei.hannote.user.relation.biz.model.dto.UnfollowUserMqDTO;
 import com.hanserwei.hannote.user.relation.biz.service.FansDOService;
@@ -15,13 +17,17 @@ import com.hanserwei.hannote.user.relation.biz.util.DateUtils;
 import jakarta.annotation.Resource;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.rocketmq.client.producer.SendCallback;
+import org.apache.rocketmq.client.producer.SendResult;
 import org.apache.rocketmq.common.message.Message;
 import org.apache.rocketmq.spring.annotation.ConsumeMode;
 import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
 import org.apache.rocketmq.spring.core.RocketMQListener;
+import org.apache.rocketmq.spring.core.RocketMQTemplate;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.core.script.DefaultRedisScript;
+import org.springframework.messaging.support.MessageBuilder;
 import org.springframework.scripting.support.ResourceScriptSource;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.support.TransactionTemplate;
@@ -32,8 +38,8 @@ import java.util.Objects;
 
 @Component
 @RocketMQMessageListener(
-        consumerGroup = "han_note_group_" + MQConstants.TOPIC_FOLLOW_OR_UNFOLLOW,
-        topic = MQConstants.TOPIC_FOLLOW_OR_UNFOLLOW,
+        consumerGroup = "han_note_group_" + MQConstants.TOPIC_FOLLOW_OR_UNFOLLOW, //han_note_group_FollowUnfollowTopic
+        topic = MQConstants.TOPIC_FOLLOW_OR_UNFOLLOW, //FollowUnfollowTopic
         consumeMode = ConsumeMode.ORDERLY
 )
 @Slf4j
@@ -47,6 +53,8 @@ public class FollowUnfollowConsumer implements RocketMQListener<Message> {
     private RateLimiter rateLimiter;
     @Resource
     private RedisTemplate<Object, Object> redisTemplate;
+    @Resource
+    private RocketMQTemplate rocketMQTemplate;
 
     @Override
     public void onMessage(Message message) {
@@ -114,6 +122,17 @@ public class FollowUnfollowConsumer implements RocketMQListener<Message> {
             String fansRedisKey = RedisKeyConstants.buildUserFansKey(unfollowUserId);
             // 删除指定粉丝
             redisTemplate.opsForZSet().remove(fansRedisKey, userId);
+
+            // 发送MQ消息通知计数服务，统计关注数
+            // 构建DTO对象
+            CountFollowUnfollowMqDTO countFollowUnfollowMqDTO = CountFollowUnfollowMqDTO.builder()
+                    .userId(userId)
+                    .targetUserId(unfollowUserId)
+                    .type(FollowUnfollowTypeEnum.UNFOLLOW.getCode())
+                    .build();
+
+            // 发送MQ
+            sendMQ(countFollowUnfollowMqDTO);
         }
     }
 
@@ -177,6 +196,53 @@ public class FollowUnfollowConsumer implements RocketMQListener<Message> {
 
             // 执行Lua脚本
             redisTemplate.execute(script, Collections.singletonList(fansZSetKey), userId, timestamp);
+
+            // 发送MQ消息通知计数服务，统计关注数
+            // 构建消息体
+            CountFollowUnfollowMqDTO countFollowUnfollowMqDTO = CountFollowUnfollowMqDTO.builder()
+                    .userId(userId)
+                    .targetUserId(followUserId)
+                    .type(FollowUnfollowTypeEnum.FOLLOW.getCode())
+                    .build();
+
+            sendMQ(countFollowUnfollowMqDTO);
         }
     }
+
+    /**
+     * 发送MQ消息
+     *
+     * @param countFollowUnfollowMqDTO 消息体
+     */
+    private void sendMQ(CountFollowUnfollowMqDTO countFollowUnfollowMqDTO) {
+        // 构建MQ消息体
+        org.springframework.messaging.Message<String> message = MessageBuilder.withPayload(JsonUtils.toJsonString(countFollowUnfollowMqDTO))
+                .build();
+
+        // 异步发送 MQ 消息
+        rocketMQTemplate.asyncSend(MQConstants.TOPIC_COUNT_FOLLOWING, message, new SendCallback() {
+            @Override
+            public void onSuccess(SendResult sendResult) {
+                log.info("==> 【计数服务：关注数】MQ 发送成功，SendResult: {}", sendResult);
+            }
+
+            @Override
+            public void onException(Throwable throwable) {
+                log.error("==> 【计数服务：关注数】MQ 发送异常: ", throwable);
+            }
+        });
+
+        // 发送 MQ 通知计数服务：统计粉丝数
+        rocketMQTemplate.asyncSend(MQConstants.TOPIC_COUNT_FANS, message, new SendCallback() {
+            @Override
+            public void onSuccess(SendResult sendResult) {
+                log.info("==> 【计数服务：粉丝数】MQ 发送成功，SendResult: {}", sendResult);
+            }
+
+            @Override
+            public void onException(Throwable throwable) {
+                log.error("==> 【计数服务：粉丝数】MQ 发送异常: ", throwable);
+            }
+        });
+    }
 }

han-note-user-relation/han-note-user-relation-biz/src/main/java/com/hanserwei/hannote/user/relation/biz/enums/FollowUnfollowTypeEnum.java

@@ -0,0 +1,17 @@
+package com.hanserwei.hannote.user.relation.biz.enums;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public enum FollowUnfollowTypeEnum {
+    // 关注
+    FOLLOW(1),
+    // 取关
+    UNFOLLOW(0),
+    ;
+
+    private final Integer code;
+
+}

han-note-user-relation/han-note-user-relation-biz/src/main/java/com/hanserwei/hannote/user/relation/biz/model/dto/CountFollowUnfollowMqDTO.java

@@ -0,0 +1,29 @@
+package com.hanserwei.hannote.user.relation.biz.model.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class CountFollowUnfollowMqDTO {
+
+    /**
+     * 原用户
+     */
+    private Long userId;
+
+    /**
+     * 目标用户
+     */
+    private Long targetUserId;
+
+    /**
+     * 1:关注 0:取关
+     */
+    private Integer type;
+
+}