redis - spring缓存 同一个 类中调用 缓存无效

问题描述

package com.github.wuhulala.service;import com.github.wuhulala.mappers.SecKillDao;import com.github.wuhulala.model.SecKill;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cache.annotation.CachePut;import org.springframework.cache.annotation.Cacheable;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;/** * @author xueaohui */@Servicepublic class SecKillService { @Autowired private SecKillDao secKillDao; //@CachePut(value = 'seckills',key = '#secKill.id') public int insertSecKill(SecKill secKill) {return secKillDao.createSecKill(secKill); } @Cacheable(value = 'seckills', key = '#secKill.id') public SecKill findOne(SecKill secKill) {System.out.println('缓存中没有 开始查询');return secKillDao.getSecKill(secKill.getId()); } @CachePut(value = 'seckills', key = '#secKill.id') public SecKill update(SecKill secKill) {System.out.println('更新secKill-----' + secKill);secKillDao.updateSecKill(secKill);return secKill; } @Transactional public int getSecKill(int id) {SecKill secKill = findOne(new SecKill(id));int number = secKill.getNumber();if (number > 0) { secKill.setNumber(number - 1); update(secKill); return id;} else { return -1;} }}

import com.github.wuhulala.AppConfig;import com.github.wuhulala.model.SecKill;import com.github.wuhulala.service.SecKillService;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import org.springframework.test.context.web.WebAppConfiguration;import static org.junit.Assert.assertEquals;/** * @author xueaohui */@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(classes = {AppConfig.class})@WebAppConfiguration('src/main/resources')public class SecKillTest { @Autowired private SecKillService service; @Test public void TestGetSecKill(){for(int i = 0 ; i < 10 ; i++) { System.out.println(service.getSecKill(9));} }}/*缓存中没有 开始查询23:51:35,977 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,042 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,072 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1更新secKill-----SecKill{id=9, name=’秒杀产品1’, number=0}23:51:36,075 DEBUG com.github.wuhulala.mappers.SecKillDao.updateSecKill (139) - ==> Preparing: update seckills set number = ? , name = ? where id=? 23:51:36,078 DEBUG com.github.wuhulala.mappers.SecKillDao.updateSecKill (139) - ==> Parameters: 0(Integer), 秒杀产品1(String), 9(Integer)23:51:36,081 DEBUG com.github.wuhulala.mappers.SecKillDao.updateSecKill (139) - <== Updates: 19缓存中没有 开始查询23:51:36,090 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,092 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,095 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,099 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,101 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,103 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,108 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,109 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,112 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,119 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,121 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,124 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,128 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,129 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,135 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,140 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,142 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,145 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,149 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,150 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,155 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,162 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,163 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,166 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1缓存中没有 开始查询23:51:36,171 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Preparing: select * from seckills where id=? 23:51:36,173 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - ==> Parameters: 9(Integer)23:51:36,176 DEBUG com.github.wuhulala.mappers.SecKillDao.getSecKill (139) - <== Total: 1-1*/

问题解答

使用auto proxy的aop（spring默认）解决不了类内部调用的问题。如果要解决这个问题得上aspectj（spring可以和aspectj的集成），aspectj采用运行时weaving 或者 编译时 weaving，会修改字节码，可以解决这个问题。

确实不可以 这是spring aop的原理所导致的

Spring类内部调用this获取的是目标对象,不是代理对象

通过BeanPostProcessor,在类正常初始化完毕以后,把自己注入bean中

通过AopContext.currentProxy获取当前代理对象