egg(90)--egg之redis在项目中的实际应用

依赖配置cnpm install egg-redis –saveconfig/plugin.jsexports.redis = { enable: false, package: ’egg-redis’,};config/config.default.js config.redis = { client: { port: 6379, // Redis port host: ‘127.0.0.1’, // Redis host password: ‘’, db: 0 } }不用redis之前的请求时间设置redisserviceapp/service/cache.js’use strict’;const Service = require(’egg’).Service;class CacheService extends Service { async set(key,value,seconds) { value = JSON.stringify(value); if(this.app.redis){ if(!seconds){ await this.app.redis.set(key,value); }else{ await this.app.redis.set(key,value,‘EX’,seconds) } } } async get(key){ if(this.app.redis){ var data = await this.app.redis.get(key); if(!data) return; return JSON.parse(data) } }}module.exports = CacheService;controllerapp/controller/default/index.js如果没有设置redis缓存，就去请求数据,再设置缓存 var topNav = await this.ctx.service.cache.get(‘index_topNav’); if(!topNav){ topNav=await this.ctx.model.Nav.find({“position”:1}); await this.ctx.service.cache.set(‘index_topNav’,topNav,6060); }全部代码’use strict’;const Controller = require(’egg’).Controller;class IndexController extends Controller { async index() { console.time(‘index_time’) //获取顶部导航的数据 var topNav = await this.ctx.service.cache.get(‘index_topNav’); if(!topNav){ topNav=await this.ctx.model.Nav.find({“position”:1}); await this.ctx.service.cache.set(‘index_topNav’,topNav,6060); } //轮播图 var focus=await this.ctx.service.cache.get(‘index_focus’); if(!focus){ focus=await this.ctx.model.Focus.find({“type”:1}); await this.ctx.service.cache.set(‘index_focus’,focus,6060); } //商品分类 var goodsCate=await this.ctx.service.cache.get(‘index_goodsCate’); if(!goodsCate){ goodsCate=await this.ctx.model.GoodsCate.aggregate([ { $lookup:{ from:‘goods_cate’, localField:’_id’, foreignField:‘pid’, as:‘items’ } }, { $match:{ “pid”:‘0’ } } ]) await this.ctx.service.cache.set(‘index_goodsCate’,goodsCate,6060); } // console.log(topNav); var middleNav=await this.ctx.service.cache.get(‘index_middleNav’); if(!middleNav){ middleNav=await this.ctx.model.Nav.find({“position”:2}); middleNav=JSON.parse(JSON.stringify(middleNav)); //1、不可扩展对象 for(var i=0;i<middleNav.length;i++){ if(middleNav[i].relation){ //数据库查找relation对应的商品 try{ var tempArr=middleNav[i].relation.replace(/，/g,’,’).split(’,’); var tempRelationIds=[]; tempArr.forEach((value)=>{ tempRelationIds.push({ “_id”:this.app.mongoose.Types.ObjectId(value) }) }) var relationGoods=await this.ctx.model.Goods.find({ $or:tempRelationIds },’title goods_img’); middleNav[i].subGoods=relationGoods; }catch(err){ //2、如果用户输入了错误的ObjectID（商品id） middleNav[i].subGoods=[]; } }else{ middleNav[i].subGoods=[]; } } await this.ctx.service.cache.set(‘index_middleNav’,middleNav,6060); } // console.log(JSON.stringify(middleNav)) var shoujiResult=await this.ctx.service.cache.get(‘index_shoujiResult’); if(!shoujiResult){ shoujiResult=await this.service.goods.get_category_recommend_goods(‘5bbf058f9079450a903cb77b’,‘best’,8); await this.ctx.service.cache.set(‘index_shoujiResult’,shoujiResult,6060); } console.timeEnd(‘index_time’) await this.ctx.render(‘default/index’,{ topNav:topNav, focus:focus, goodsCate:goodsCate, middleNav:middleNav, shoujiResult:shoujiResult }); }}module.exports = IndexController;设置redis缓存后的时间