1. What is this?

Cache expensive methods calls with a declarative attribute. No custom code required.

2. Simple Example

[Cache.Cacheable] //this method now cached, will only be called once per guid
public SomeExpensiveObject GetExpensiveObject(Guid userId)
{
..
}

3. Cache with invalidation:

[Cache.Cacheable("UniqueKeyForThisMethod")] //cache using this key plus parameter(s)
public SomeObject GetObjectById(Int32 Id)
{
...
}

[Cache.TriggerInvalidation("UniqueKeyForThisMethod")] //delete from cache using this key and passed parameter(s)
public void RemoveObjectById(Int32 Id)
{
..
} 

More examples can also be found here: http://cascadeofinsights.com/post/1410736927/introducing-attribute-based-caching

4. How does it work

Using postsharp to make method interceptions when a cached version exists

4.1 Configuration

<?xml version="1.0" encoding="utf-8"?>

<configuration>
  <configSections>
    <section name="aopCacheConfiguration" type="CacheAspect.Config.AopCacheConfiguration, CacheAspect" />
  </configSections>
  <aopCacheConfiguration type="CacheAspect.MemoryCache" path="" ttl="7:0:0:0" />
  <system.runtime.caching>
    <memoryCache>
      <namedCaches>
        <clear />
        <add name="PostSharp.Cache" cacheMemoryLimitMegabytes="256" pollingInterval="00:05:00" />
      </namedCaches>
    </memoryCache>
  </system.runtime.caching>
</configuration>

5. More / Press / Blogs

• http://paulstack.co.uk/blog/post/Attribute-Based-Caching-with-PostSharp.aspx
• http://cascadeofinsights.com/post/1410736927/introducing-attribute-based-caching
• http://www.infoq.com/news/2011/04/Attribute-Caching
• http://www.postsharp.net/blog/post/Attribute-Based-Caching-and-Unit-Testing-of-Aspects
• http://stackoverflow.com/questions/5328819/caching-attribute-for-method

6. Previous Releases (on codeplex)

1.00

• Original Codeplex Release

1.2

• faster key generation strategy - thanks payman
• basic unit tests - thanks payman
• btree disk cache
• removed unity dependency
• simple timetolive setting

1.2.1

• adding ignoreTTL
• adding support for colection to KeyBuilder
• adding deconstructor to btreecache - to clean up open filestream
• add compile-time reflection cache attribute
• GitHub version is the most recent version

1.2.2

• adding app.config based configuration