feat(PmsConstants.java): 商品详情缓存

1、添加商品详情本地缓存
2、商品详情分布式锁保证原子操作

Closes I3V770

mall-pms/pms-boot/src/main/java/com/youlai/mall/pms/common/constant/PmsConstants.java

@@ -9,4 +9,8 @@ public interface PmsConstants {
     String LOCKED_STOCK_PREFIX = "stock:locked:";
 
     String LOCK_SKU_PREFIX="lock:sku:";
+
+    String PRODUCT_DETAIL_CACHE = "product:detail:cache:";
+
+    String LOCK_PRODUCT_DETAIL="lock:product:detail";
 }

mall-pms/pms-boot/src/main/java/com/youlai/mall/pms/config/ProductLocalCache.java

+package com.youlai.mall.pms.config;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.youlai.mall.pms.pojo.dto.app.ProductFormDTO;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+import java.util.concurrent.TimeUnit;
+
+/**
+* @author DaniR
+* @version 1.0
+* @description 本地缓存设置
+* @createDate 2021/6/16 10:08
+*/
+@Slf4j
+@Component
+public class ProductLocalCache {
+   private Cache<String, ProductFormDTO> localCache = null;
+
+   @PostConstruct
+   private void init(){
+       localCache = CacheBuilder.newBuilder()
+               //设置本地缓存容器的初始容量
+               .initialCapacity(10)
+               //设置本地缓存的最大容量
+               .maximumSize(500)
+               //设置写缓存后多少秒过期
+               .expireAfterWrite(60, TimeUnit.SECONDS).build();
+   }
+
+
+   public void setLocalCache(String key, ProductFormDTO object){
+       localCache.put(key,object);
+   }
+
+   public ProductFormDTO get(String key){
+       return localCache.getIfPresent(key);
+   }
+}

mall-pms/pms-boot/src/main/java/com/youlai/mall/pms/service/impl/ProductServiceImpl.java

@@ -5,58 +5,103 @@ import cn.hutool.core.util.StrUtil;
 import cn.hutool.json.JSONUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.youlai.common.redis.utils.RedisUtils;
+import com.youlai.mall.pms.config.ProductLocalCache;
 import com.youlai.mall.pms.mapper.PmsSpuMapper;
+import com.youlai.mall.pms.pojo.dto.SpuDTO;
 import com.youlai.mall.pms.pojo.dto.app.ProductFormDTO;
-import com.youlai.mall.pms.pojo.entity.PmsSpuAttributeValue;
 import com.youlai.mall.pms.pojo.entity.PmsSku;
 import com.youlai.mall.pms.pojo.entity.PmsSpec;
 import com.youlai.mall.pms.pojo.entity.PmsSpu;
-import com.youlai.mall.pms.pojo.dto.SpuDTO;
-import com.youlai.mall.pms.service.IPmsSpuAttributeValueService;
+import com.youlai.mall.pms.pojo.entity.PmsSpuAttributeValue;
 import com.youlai.mall.pms.service.IPmsSkuService;
 import com.youlai.mall.pms.service.IPmsSpecService;
+import com.youlai.mall.pms.service.IPmsSpuAttributeValueService;
 import com.youlai.mall.pms.service.IProductService;
 import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.redisson.api.RLock;
+import org.redisson.api.RedissonClient;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
 
+import static com.youlai.mall.pms.common.constant.PmsConstants.LOCK_PRODUCT_DETAIL;
+import static com.youlai.mall.pms.common.constant.PmsConstants.PRODUCT_DETAIL_CACHE;
+
 /**
  * @author haoxr
  * @date 2020-11-06
  */
 @Service
+@Slf4j
 @AllArgsConstructor
 public class ProductServiceImpl extends ServiceImpl<PmsSpuMapper, PmsSpu> implements IProductService {
 
-    private IPmsSkuService iPmsSkuService;
-    private IPmsSpuAttributeValueService iPmsSpuAttributeValueService;
-    private IPmsSpecService iPmsSpecService;
+    private final IPmsSkuService iPmsSkuService;
+    private final IPmsSpuAttributeValueService iPmsSpuAttributeValueService;
+    private final IPmsSpecService iPmsSpecService;
+    private final RedisUtils redisUtils;
+    private final RedissonClient redissonClient;
+    private final ProductLocalCache productLocalCache;
+
 
     @Override
     public ProductFormDTO getProductById(Long spuId) {
-        // spu
-        PmsSpu spu = this.getById(spuId);
-        SpuDTO SpuDTO = new SpuDTO();
-        BeanUtil.copyProperties(spu, SpuDTO);
-        if (StrUtil.isNotBlank(spu.getPics())) {
-            // spu专辑图片转换处理 json字符串 -> List
-            List<String> pics = JSONUtil.toList(JSONUtil.parseArray(spu.getPics()), String.class);
-            SpuDTO.setPics(pics);
+        //1、一级本地缓存设置
+        ProductFormDTO product = productLocalCache.get(PRODUCT_DETAIL_CACHE + spuId);
+        if (null != product) {
+            log.info("get LocalCache product:" + product);
+            return product;
         }
-        // 属性
-        List<PmsSpuAttributeValue> attrs = iPmsSpuAttributeValueService.list(
-                new LambdaQueryWrapper<PmsSpuAttributeValue>(
-                ).eq(PmsSpuAttributeValue::getSpuId, spuId)
-        );
-
-        // 规格
-        List<PmsSpec> specs = iPmsSpecService.listBySpuId(spuId);
-
-        // sku
-        List<PmsSku> skuList = iPmsSkuService.list(new LambdaQueryWrapper<PmsSku>().eq(PmsSku::getSpuId, spuId));
+        //2、二级缓存设置，Redis中获取商品详情信息
+        product = (ProductFormDTO) redisUtils.get(PRODUCT_DETAIL_CACHE + spuId);
+        if (null != product) {
+            log.info("get redis product:" + product);
+            return product;
+        }
+        //3、分布式锁，保证原子操作
+        RLock lock = redissonClient.getLock(LOCK_PRODUCT_DETAIL + spuId);
+        try {
+            if (lock.tryLock()) {
+                // spu
+                PmsSpu spu = this.getById(spuId);
+                SpuDTO SpuDTO = new SpuDTO();
+                BeanUtil.copyProperties(spu, SpuDTO);
+                if (StrUtil.isNotBlank(spu.getPics())) {
+                    // spu专辑图片转换处理 json字符串 -> List
+                    List<String> pics = JSONUtil.toList(JSONUtil.parseArray(spu.getPics()), String.class);
+                    SpuDTO.setPics(pics);
+                }
+                // 属性
+                List<PmsSpuAttributeValue> attrs = iPmsSpuAttributeValueService.list(
+                        new LambdaQueryWrapper<PmsSpuAttributeValue>(
+                        ).eq(PmsSpuAttributeValue::getSpuId, spuId)
+                );
+                // 规格
+                List<PmsSpec> specs = iPmsSpecService.listBySpuId(spuId);
+                // sku
+                List<PmsSku> skuList = iPmsSkuService.list(new LambdaQueryWrapper<PmsSku>().eq(PmsSku::getSpuId, spuId));
 
-        ProductFormDTO product = new ProductFormDTO(SpuDTO, attrs, specs, skuList);
+                product = new ProductFormDTO(SpuDTO, attrs, specs, skuList);
+                //TODO 4、需要判断商品是否是秒杀商品，根据秒杀信息更新商品秒杀相关信息
+                log.info("get db product:" + product);
+                redisUtils.set(PRODUCT_DETAIL_CACHE + spuId, product, 3600);
+                productLocalCache.setLocalCache(PRODUCT_DETAIL_CACHE + spuId,product);
+            } else {
+                log.info("get redis2 product:" + product);
+                product = (ProductFormDTO) redisUtils.get(PRODUCT_DETAIL_CACHE + spuId);
+                if (null!=product) {
+                    productLocalCache.setLocalCache(PRODUCT_DETAIL_CACHE + spuId, product);
+                }
+            }
+        } finally {
+            if (lock.isLocked()) {
+                if (lock.isHeldByCurrentThread()) {
+                    lock.unlock();
+                }
+            }
+        }
         return product;
     }
 }