EF 二级缓存 EFSecondLevelCache

EFSecondLevelCache
=======
Entity Framework 6.x Second Level Caching Library.

对数据库了。


使用方法:
1- 设置缓存失效通过重写SaveChanges方法防止过期写道

namespace EFSecondLevelCache.TestDataLayer.DataLayer
{
    public class SampleContext : DbContext
    {
        // public DbSet<Product> Products { get; set; }

        public SampleContext()
            : base("connectionString1")
        {
        }

　　　　　　//重写 SaveChanges
        public override int SaveChanges()
        {
            return SaveAllChanges(invalidateCacheDependencies: true);
        }

        public int SaveAllChanges(bool invalidateCacheDependencies = true)
        {
            var changedEntityNames = getChangedEntityNames();
            var result = base.SaveChanges();
            if (invalidateCacheDependencies)
            {
                new EFCacheServiceProvider().InvalidateCacheDependencies(changedEntityNames);
            }
            return result;
        }
 
          //修改、删除、添加数据时缓存失效
        private string[] getChangedEntityNames()
        {
            return this.ChangeTracker.Entries()
                .Where(x => x.State == EntityState.Added ||
                            x.State == EntityState.Modified ||
                            x.State == EntityState.Deleted)
                .Select(x => System.Data.Entity.Core.Objects.ObjectContext.GetObjectType(x.Entity.GetType()).FullName)
                .Distinct()
                .ToArray();
        }
    }
}

在这些情况下,试着SaveAllChanges(invalidateCacheDependencies:false),之前更新数据。

2- 然后正常查询缓存的结果:
var products = context.Products.Include(x => x.Tags).FirstOrDefault();

的扩展方法:
var products = context.Products.Include(x => x.Tags).Cacheable().FirstOrDefault(); // Async methods are supported too.
  如果一个页面需要身份验证,其数据不应该被缓存。

开源地址：
   https://github.com/VahidN/EFSecondLevelCache