nhibernate性能之二级缓存篇

<property name="hibernate.cache.provider_class">NHibernate.Caches.SysCache.SysCacheProvider, NHibernate.Caches.SysCache</property><property name="expiration">120</property>

<?xml version="1.0" encoding="utf-8" ?><hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">  <class name="NhibernateSample1.User,NhibernateSample1" table="Users" lazy="false">    <cache usage="read-write"/>    <id name="Id" column="Id" unsaved-value="0">      <generator class="native" />    </id>    <property name="Name" column="Name" type="string" length="64" not-null="true" unique="true"></property>    <property name="Pwd"  column="Pwd"  type="string" length="64" not-null="true"></property>    <many-to-one name="Role"  class="NhibernateSample1.Role,NhibernateSample1" column="RoleID"></many-to-one>   </class></hibernate-mapping>

using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using NHibernate;using NHibernate.Cfg;namespace WebApp{    public sealed class NHibernateHelper    {        private const string CurrentSessionKey = "nhibernate.current_session";        private static readonly ISessionFactory sessionFactory;        static NHibernateHelper()        {            string cfgPath = @"E:\my project\nhibernate study\simple4\NHibernateStudy1\NhibernateSample1\hibernate.cfg.xml";            sessionFactory = new NHibernate.Cfg.Configuration().Configure(cfgPath).BuildSessionFactory();        }        public static ISession GetCurrentSession()        {            HttpContext context = HttpContext.Current;            ISession currentSession = context.Items[CurrentSessionKey] as ISession;            if (currentSession == null)            {                currentSession = sessionFactory.OpenSession();                context.Items[CurrentSessionKey] = currentSession;            }            return currentSession;        }        public static void CloseSession()        {            HttpContext context = HttpContext.Current;            ISession currentSession = context.Items[CurrentSessionKey] as ISession;            if (currentSession == null)            {                // No current session                return;            }            currentSession.Close();            context.Items.Remove(CurrentSessionKey);        }        public static void CloseSessionFactory()        {            if (sessionFactory != null)            {                sessionFactory.Close();            }        }    }}

System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();            sw.Start();            ISession session = NHibernateHelper.GetCurrentSession();            ITransaction tra = session.BeginTransaction();            session.Load(typeof(NhibernateSample1.User), 1);            tra.Commit();                       sw.Stop();            Response.Write(sw.ElapsedTicks+"<br>");            sw.Reset();            sw.Start();            session = NHibernateHelper.GetCurrentSession();            tra = session.BeginTransaction();            session.Load(typeof(NhibernateSample1.User), 1);            tra.Commit();                       sw.Stop();            Response.Write(sw.ElapsedTicks + "<br>");            sw.Reset();            sw.Start();            session = NHibernateHelper.GetCurrentSession();            session.Close();            sw.Stop();            Response.Write(sw.ElapsedTicks + "<br>");