Code Monkey home page Code Monkey logo

daocache's Introduction

2015-5-30
1.解决了缓存穿透问题,当有相同sql正在读取数据库时,等待另一条相同sql执行结束,并等待另一条相同sql将数据写入缓存,然后本条sql直接到缓存中读数据,不走数据库.
  在并发时,相同的sql会重复从数据库中读取数据,导致缓存无效。此处并非简单地加锁,而是使用了一个带线程名字的线程池,当线程池中没有重复的sql则正常读取,当发现线程中有和本条sql相同的
  sql语句正在读取数据库时,则阻塞本线程,等待另一条sql语句从数据库中取出数据后,直接去缓存中取数据,减轻数据库压力。
  以上描述的场景在应用启动或高并发时非常明显,此方法非常有效地解决了此问题。
2.解决关联关系初始化时不能写入缓存的问题,可能是由于ehcache缓存还未完全启动时写入缓存导致.
2015-5-24
1.解决了根据主键update或delete时,不认为是主键的问题
2.解决了insert into语句不会清除缓存的问题
2015-5-19
1.根据兽解决的缓存保存Null值的问题的原理,做了一些修改.
2.增加1级,如t_user的一级缓存为t_user_L1___
3.增加了缓存之间的关联关系,用于多表查询以及视图查询,多表查询时缓存名使用##连接,如t_user##t_usergroup,当清除t_user表的缓存时会清除缓存名为t_user##t_usergroup的缓存.
4.多表查询以及视图查询相当于L3
2015-5-19前
1.ehcache.xml是配置ehcache文件,放在classes目录
2.dao.js文件通过js文式配置daocache需要缓存的表,以及配置DaoExecutor以及NutDaoExt

daocache's People

Contributors

fangoxyz avatar

Watchers

James Cloos avatar xwqiang avatar

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google ❤️ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.