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Apache-2.0

MybatisPlus 整合 Redis 缓存的CRUD开发脚架

项目介绍

MybatisPlus 整合 Redis 缓存的CRUD开发脚架, 在我们搭建项目, 整合MybatisPlus后, 如果要提升查询性能, 一般都会采用Redis作为缓存, 但是采用网上一些开源的Redis注解方式框架整合, 发现效果并不理想, 不能灵活地控制缓存粒度和保持MySQL与Redis的事务同步, 所以自己整合了这套crud开发脚架, 并且开源,避免重复造轮子,有需要的可以拿去参考和使用;

注意事项

  1. 由于有些操作采用了Redis的事务模板进行操作, 如果你做的是微服务, 并且使用第三方分布式事务框架是LCN,则不适用这套crud,原因 是LCN进行分布式事务协调时,对MySQL连接做了假提交,当分布式事务成功后,才真正提交事务操作到MySQL数据库,而当分布式事务失败后则 不提交事务操作到MySQL,但是RedisTranTemplate当LCN做出假提交后,都会提交事务操作到Redis数据库,所以当LCN分布式事务失 败后,就会出现Redis的事务操作却不能同步回滚的情况,导致缓存中出现脏数据;

2.现在的查询方式已足以应对日常开发遇到的问题,在生成代码时,已限制不采用ser user = new User(); user.insert()这种方式进行操作 [ 原因 : 这种方式本项目还没整合Redis操作,所以不能使用该方式进行操作,否则会造成缓存不一致的情况! ]";

3.了解Redis的人,都知道它的事务其实并不是完整的事务,无法保证一次性提交的事务中的每一个命令都能执行成功,但是绝大多数情况下都是可以全部正确执行的, 如果不使用事务与MySQL整合,后果是更加严重的,例如在注册时插入用户表时发生异常,MySQL的数据已经回滚,但Redis中却不会滚,成功提交了, 脏数据必然会产生,导致缓存中已经有一个user对象;

软件架构

1.Mybatis-plus : 采用能快速进行 CRUD 操作的 Mybatis-plus, 当前版本 3.0.5 , 官方网址 http://mp.baomidou.com/;

2.Redis序列化方式 : 采用高性能省内存空间的Google开源的序列化方式 Protostuff, 序列化性能对比 https://www.cnblogs.com/lonelywolfmoutain/p/5563985.html;

耗时对比:

Image text

空间占用对比:

Image text

感谢 caodongfang126 的博客文章分享的 ProtostuffUtils

测试分页查询

压测工具 Gatling 25秒内启动完线程300个, 持续压测86秒 Image text 每秒qps大概7000多

Image text 99%的请求时间低于50毫秒

安装教程

需要安装 Redis, MySQL, IDEA, Maven等

使用说明

  1. 修改数据库连接信息: application.yml 的 MySQL连接信息, config\redis.properties的redis连接信息;
  2. 执行脚本 \db\crud.sql 初始化数据库;
  3. 执行测试用例,参考 UserServiceTest;
  4. 整合方式, MybatisPlus不使用Redis,继承ServiceImpl; MybatisPlus使用Redis 继承 ServiceWithRedisImpl即可;

开发计划

1.后期新增配套的代码生成器; 已添加 2.完善使用例子

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简介

MybatisPlus 整合 Redis 缓存的CRUD开发脚架, 在我们搭建项目, 整合MybatisPlus后, 如果要提升查询性能, 一般都会采用Redis作为缓存, 但是采用网上一些开源的Redis注解方式框架整合, 发现效果并不理想, 不能灵活地控制缓存粒度和保持MySQL与Redis的事务同步, 所以自己整合了这套crud开发脚架, 并且开源,避免重复造轮子,有需要的可以拿去参考和使用 展开 收起
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