NHibernate二级缓存，带有外部更新 [英] NHibernate second-level cache with external updates

问题描述

我有一个Web应用程序，该应用程序是99％只读的，具有一个单独的服务，该服务以特定的时间间隔(例如每10分钟更新一次)来更新数据库.该服务如何告知应用程序使其二级缓存无效?真的重要吗? (我实际上并不在乎是否有过时的数据)如果我不使高速缓存无效，则需要多长时间才能更新记录(如果使用SysCache)

I've got a web application that is 99% read-only, with a separate service that updates the database at specific intervals (like every 10 minutes). How can this service tell the application to invalidate it's second-level cache? Is it actually important? (I don't actually care if I have too much stale data) If I don't invalidate the cache how much time is needed to the records to get updated (if using SysCache)

推荐答案

您可以为特定实体，实体类型或集合手动设置二级缓存.

You can manually dispose your 2nd level cache for a specific entity, entity type or a collection.

来自 http://knol .google.com/k/fabio-maulo/nhibernate-chapter-16-improving/1nr4enxv3dpeq/19#

对于二级缓存，在ISessionFactory上定义了一些方法，用于清除实例，整个类，集合实例或整个集合角色的缓存状态.

For the second-level cache, there are methods defined on ISessionFactory for evicting the cached state of an instance, entire class, collection instance or entire collection role.

sessionFactory.Evict(typeof(Cat), catId); //evict a particular Cat
sessionFactory.Evict(typeof(Cat));  //evict all Cats
sessionFactory.EvictCollection("Eg.Cat.Kittens", catId); //evict a particular collection of kittens
sessionFactory.EvictCollection("Eg.Cat.Kittens"); //evict all kitten collections

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