做网站服务器软件,wordpress 建博客教程,wordpress外国模板,做网站一定要有营业执照吗文章目录 概要整体架构流程技术细节小结 概要
因为商品是经常被浏览的,所以数据库的访问量就问大大增加,造成负载过大影响性能,所以我们需要把商品缓存到redis当中,因为redis是存在内存中的,所以效率会比MySQL的快. 整体架构流程 技术细节
我们在缓存时需要保持数据的一致性所… 文章目录 概要整体架构流程技术细节小结 概要
因为商品是经常被浏览的,所以数据库的访问量就问大大增加,造成负载过大影响性能,所以我们需要把商品缓存到redis当中,因为redis是存在内存中的,所以效率会比MySQL的快. 整体架构流程 技术细节
我们在缓存时需要保持数据的一致性所以当管理端用户进行增删改操作的时候需要清理缓存,否则用户看到的商品则是缓存中的(未被修改的商品)
小结
GetMapping(/list)ApiOperation(根据分类id查询菜品)public ResultListDishVO list(Long categoryId) {//缓存菜品String key dish_ categoryId;ListDishVO list (ListDishVO) redisTemplate.opsForValue().get(key);if (list ! null list.size() 0) {return Result.success(list);}Dish dish new Dish();dish.setCategoryId(categoryId);dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品list dishService.listWithFlavor(dish);//如果不存在则查数据库存入redisredisTemplate.opsForValue().set(key,list);return Result.success(list);}
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package com.sky.controller.admin;import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;import javax.websocket.server.PathParam;
import java.util.List;
import java.util.Set;RestController
RequestMapping(admin/dish)
Slf4j
Api(tags 菜品相关接口)
public class DishController {Autowiredprivate DishService dishService;Autowiredprivate RedisTemplate redisTemplate;/*** 新增菜品* param dishDTO* return*/PostMappingApiOperation(新增菜品)public Result save(RequestBody DishDTO dishDTO){Long categoryId dishDTO.getCategoryId();String key dish_ categoryId;deleteCache(key);dishService.saveWithFlavor(dishDTO);return Result.success();}/*** 菜品分页查询* param dishPageQueryDTO* return*/GetMapping(/page)ApiOperation(菜品分页查询)public ResultPageResult page(DishPageQueryDTO dishPageQueryDTO){log.info(菜品分页查询:{}, dishPageQueryDTO);PageResult pageResult dishService.pageQuery(dishPageQueryDTO);return Result.success(pageResult);}/*** 批量删除菜品* param ids* return*/DeleteMappingApiOperation(批量删除菜品)public Result delete(RequestParam ListLong ids){log.info(批量删除菜品:{}, ids);deleteCache(dish_*);dishService.deleteBatch(ids);return Result.success();}/*** 根据id查询菜品* param id* return*/GetMapping(/{id})ApiOperation(根据id查询菜品)public ResultDishVO getById(PathVariable Long id){log.info(根据id查询菜品);DishVO dishVO dishService.getByIdWithFlavor(id);return Result.success(dishVO);}/*** 修改菜品* param dishDTO* return*/PutMappingApiOperation(修改菜品)public Result update(RequestBody DishDTO dishDTO){log.info(修改菜品:{},dishDTO);deleteCache(dish_*);dishService.updateWithFlavor(dishDTO);return Result.success();}GetMapping(/list)public ResultListDish list(RequestParam Long categoryId){log.info(根据分类id查询菜品:{},categoryId);ListDish list dishService.list(categoryId);return Result.success(list);}PostMapping(/status/{status})ApiOperation(菜品起售停售)public ResultString startOrStop(PathVariable Integer status, Long id){deleteCache(dish_*);dishService.startOrStop(status,id);return Result.success();}private void deleteCache(String pattern){Set keys redisTemplate.keys(pattern);redisTemplate.delete(keys);}
}
