topic锁

community-service/src/main/java/com/tanpu/community/service/VisitLogService.java

@@ -3,12 +3,14 @@ package com.tanpu.community.service;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.tanpu.biz.common.enums.clue.PageEnum;
 import com.tanpu.community.api.enums.DeleteTagEnum;
+import com.tanpu.community.cache.RedisCache;
 import com.tanpu.community.dao.entity.community.TimesCountEntity;
 import com.tanpu.community.dao.entity.community.VisitLogEntity;
 import com.tanpu.community.dao.mapper.community.VisitLogMapper;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.ListUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.time.DateUtils;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -29,6 +31,9 @@ public class VisitLogService {
     @Resource
     private VisitLogMapper visitLogMapper;
 
+    @Resource
+    private RedisCache redisCache;
+
     // 获取用户7天内访问过的
     public List<String> queryUserRecentVisited(String userId) {
         Date endDate = new Date();
@@ -59,11 +64,24 @@ public class VisitLogService {
 
     @Transactional
     public void insertOrUpdateDur(VisitLogEntity vs) {
+        // 分布式锁
+        for (;;) {
+            String key = getVisitLogRedisKey(vs);
+            if (redisCache.setIfAbsent(key, "1", 15)) {
                 if (visitLogMapper.selectByIdentAndRefId(vs.getIdent(), vs.getRefId(), vs.getRefType()) == null) {
                     visitLogMapper.insert(vs);
                 } else {
                     visitLogMapper.updateDurByIdent(vs.getDuration(), vs.getIdent());
                 }
+                // 如果执行超时,会删除别的实例的key
+                redisCache.evict(key);
+                return;
+            }
+        }
+    }
+
+    private String getVisitLogRedisKey(VisitLogEntity vs) {
+        return StringUtils.join("insertOrUpdateDur:", vs.getIdent().substring(0, 4), vs.getRefId(), vs.getRefType());
     }
 
     @Transactional

community-service/src/main/resources/application-test.yml

@@ -60,6 +60,8 @@ spring:
     enabled: false
   zipkin:
     enabled: false
+  redis:
+    database: 7
 
 aliyun:
   oss: