引入rabbitmq/应用解偶/流量削峰，引入redisson实现分布式锁

novel-book/book-service/pom.xml

@@ -41,9 +41,6 @@
         </dependency>
 
 
-
-
-
     </dependencies>
 
 

novel-book/book-service/src/main/java/com/java2nb/novel/book/controller/BookController.java

@@ -13,6 +13,7 @@ import io.swagger.annotations.ApiOperation;
 import io.swagger.annotations.ApiParam;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.HashMap;
@@ -34,6 +35,8 @@ public class BookController {
 
     private final BookService bookService;
 
+    private final RabbitTemplate rabbitTemplate;
+
     /**
      * 小说分类列表查询接口
      */
@@ -67,7 +70,7 @@ public class BookController {
     @ApiOperation("点击量新增接口")
     @PostMapping("addVisitCount")
     public ResultBean addVisitCount(@ApiParam("小说ID") @RequestParam("bookId") Long bookId) {
-        bookService.addVisitCount(bookId, 1);
+        rabbitTemplate.convertAndSend("ADD-BOOK-VISIT-EXCHANGE", null, bookId);
         return ResultBean.ok();
     }
 

novel-book/book-service/src/main/java/com/java2nb/novel/book/listener/BookVisitAddListener.java

@@ -0,0 +1,70 @@
+package com.java2nb.novel.book.listener;
+import com.java2nb.novel.book.service.BookService;
+import com.java2nb.novel.common.cache.CacheKey;
+import com.java2nb.novel.common.cache.CacheService;
+import com.java2nb.novel.common.utils.Constants;
+import com.rabbitmq.client.Channel;
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import lombok.extern.slf4j.Slf4j;
+import org.redisson.api.RLock;
+import org.redisson.api.RedissonClient;
+import org.springframework.amqp.core.Message;
+import org.springframework.amqp.rabbit.annotation.RabbitListener;
+import org.springframework.stereotype.Component;
+
+
+/**
+ * @author 11797
+ */
+@Component
+@Slf4j
+@RequiredArgsConstructor
+public class BookVisitAddListener {
+
+    private final BookService bookService;
+
+    private final CacheService cacheService;
+
+
+    private final RedissonClient redissonClient;
+
+
+
+
+    /**
+     * 更新数据库
+     * 流量削峰，每本小说累积10个点击更新一次
+     */
+    @SneakyThrows
+    @RabbitListener(queues = {"UPDATE-DB-QUEUE"})
+    public void updateDb(Long bookId, Channel channel, Message message) {
+
+        log.debug("收到更新数据库消息：" + bookId);
+        RLock lock = redissonClient.getLock("addVisitCountToDb");
+        lock.lock();
+        try {
+            Integer visitCount = (Integer) cacheService.getObject(CacheKey.BOOK_ADD_VISIT_COUNT + bookId);
+            if (visitCount == null) {
+                visitCount = 0;
+            }
+            cacheService.setObject(CacheKey.BOOK_ADD_VISIT_COUNT + bookId, ++visitCount);
+            if (visitCount >= Constants.ADD_MAX_VISIT_COUNT) {
+                bookService.addVisitCount(bookId, visitCount);
+                cacheService.del(CacheKey.BOOK_ADD_VISIT_COUNT + bookId);
+            }
+        }catch (Exception e){
+            log.error("更新数据库失败"+bookId);
+        }
+
+        lock.unlock();
+
+        Thread.sleep(1000 * 2);
+
+
+
+    }
+
+
+
+}

novel-book/book-service/src/main/resources/bootstrap.yml

@@ -3,3 +3,15 @@ spring:
     name: book-service
   profiles:
     active: dev
+
+  cloud:
+    nacos:
+      config:
+        ext‐config[0]:
+          data‐id: novel-redis.yml
+          group: novel-common
+          refresh: true
+        ext‐config[1]:
+          data‐id: novel-rabbitmq.yml
+          group: novel-common
+          refresh: true