NHibernate second level cache caching entities wit

问题:

I have configured second level cache on the session factory. However for the POCO entity I have not enabled caching.

I am using Fluent NHibernate for configuring the SessionFactory and the POCO entities.

Here is the configuration of the session factory:

            var cfg = Fluently.Configure()
            .Database(MsSqlConfiguration.MsSql2008.ConnectionString(connectionString)
                          .Provider("NHibernate.Connection.DriverConnectionProvider, NHibernate")
                          .Dialect<CustomMsSql2008Dialect>()
                          .Driver<SqlAzureClientDriver>()
                          .ShowSql())
            .Cache(x =>
                {
                    x.UseQueryCache();
                    x.UseSecondLevelCache().ProviderClass<HashtableCacheProvider>().UseMinimalPuts();
                })

The POCO entity configuration is as follows:

        public CustomerConfiguration()
    {
        Table("Sys_Customer");
        DynamicUpdate();

        Id(x => x.Id).GeneratedBy.GuidComb().UnsavedValue(Guid.Empty);

        Map(x => x.Code);
        Map(x => x.Name);
        Map(x => x.IsActive);
        Component(x => x.Contact).ColumnPrefix("Contact_");
        Component(x => x.Address).ColumnPrefix("Address_");
        Map(x => x.IsDeleted);
        Map(x => x.CreatedOn).Column("CreatedOn");
        Map(x => x.CreatedBy).Column("CreatedBy").Length(100);
        Map(x => x.LastModifiedOn).Column("LastModifiedOn");
        Map(x => x.LastModifiedBy).Column("LastModifiedBy").Length(100);

        Version(x => x.RowVersion).UnsavedValue("0");
    }

So clearly for the Sys_Customer entity i have not configured any Caching, yet when i run the following code: the database is hit only once:

        using (ISession s = RepositorySession)
        {
            var f = s.Get<Customer>(new Guid("75EDC0C2-4E58-43FF-B0D8-8C52FBB2D502"));
            var d = f.Code;
        }

        using (ISession s = RepositorySession)
        {
            var f = s.Get<Customer>(new Guid("75EDC0C2-4E58-43FF-B0D8-8C52FBB2D502"));
            var d = f.Code;
        }

when I remove the Cache Configuration from the SessionFactory then the database is hit twice. so clearly the entity is getting cached in the second level cache.

Can someone tell me how to avoid caching the entity into the second level cache of NHibernate????

回答1:

I had ClassConvention that was configured with second level cache. it looked as follows:

    public class ClassConvention : IClassConvention
{
    /// <summary>
    /// Applies the specified instance.
    /// </summary>
    /// <param name="instance">The instance.</param>
    public void Apply(IClassInstance instance)
    {
        instance.Table(instance.EntityType.Name);
        instance.LazyLoad();
        instance.Cache.NonStrictReadWrite();
    }
}

this was causing the entity to be cached into the second level cache. i removed the configuration from IClassConvention and now it is working as expected