var services = new ServiceCollection();
services.AddMemoryCache(option => { });
services.AddSingleton(sp => new RedisService("localhost:32768"));
services.AddDistributedRedisCache(option => { option.InstanceName = "local"; });
services.AddSingleton<ICacheSerializer, JsonCacheSerializer>();
services.AddSingleton<ICacheProvider, DistributedCacheProvider>();
services.AddSingleton<CacheFactory>();

class PostManager
{
    private readonly ICache m_Cache;

    public PostManager(CacheFactory cacheFactory)
    {
        m_Cache = cacheFactory.GetCache("Post");
    }

    public Post Get(int id)
    {
        var key = CacheKey.NewCacheKeyString(id);//最终格式：local:Post:{id}
        var data = m_Cache.Get<Post>(key);
        if(data == null){
            //TODO: get from database
            //m_Cache.Set(key, data);
        }
        return data;
    }

    public void Delete(int id)
    {
        var key = CacheKey.NewCacheKeyString(id);
        //TODO: delete from database
        m_Cache.Remove(key);
    }
}