TP缓存设计方案解析

TP的缓存主要依赖Cache类,Cache类其实是一个代理类,Cache类通过getInstance静态方法来获取缓存实例,而getInstance方式实际是调用Cache类的connect方法,该方法类似于工厂返回对应缓存类型的驱动实例,这里以Redis为例,那么这里返回的就是CacheRedis驱动,该驱动在构造函数中会实例Redis扩展类,并赋值给handle属性来做本地代理,所以我们可以像使用Redis类一样的使用CahceRedis,并重写get和set方法,提供对外的统一接口.

查询缓存

查询缓存使用Model的cache方法来实现缓存处理,cache方法接受3个参数,分别为:缓存的键,缓存时间,缓存类型,并返回当前Model的实例$this,在这里Model只是将缓存信息存入options属性,之后DB类在select方法中会检测是否使用缓存,并调用S方法来做缓存的存取,S方法实际上则是使用Cache类来做存取

缓存的键:可以为字符串或者true,如果为true,那么TP会根据生成的SQL语句的MD5值作为key,缓存前缀读取配置DATA_CACHE_PREFIX

缓存时间:以秒为单位,如果不设置则读取配置文件中DATA_CACHE_TIME的值

缓存类型:默认为文件缓存,可选类型aaarticlea/png;base64,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" alt="" />,这是TP默认支持的缓存驱动,也可自己扩展,如果不设置该值则读取配置DATA_CACHE_TYPE

Redis相关配置

REDIS_HOST 主机
REDIS_PORT 端口
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