Memcached 之 .NET（C#）实例分析

一：Memcached的安装

step1. 下载memcache(http://jehiah.cz/projects/memcached-win32)的windows稳定版（这里我下载了memcached 1.2.1 for Win32 binaries (Dec 23, 2006) 这个版本），解压放某个盘下面，比如在c:\memcached
step2. 在终端（也即cmd命令界面）下输入 ‘c:\memcached\memcached.exe -d install’ 安装
step3. 再输入： ‘c:\memcached\memcached.exe -d start’ 启动。

PS: 以后memcached将作为windows的一个服务每次开机时自动启动。这样服务器端已经安装完毕了。

二： .NET memcached client library
       下载文件：https://sourceforge.net/projects/memcacheddotnet/

将Commons.dll，ICSharpCode.SharpZipLib.dll，log4net.dll，Memcached.ClientLibrary.dll 等放到bin目录

引用Memcached.ClientLibrary.dll

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->using System;
using System.Collections;
using Memcached.ClientLibrary;
using System.Text;

namespace Memcache
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (Request["action"] == "clear")
                    this.clear();
                else
                    this.test();
            }
        }

        public void clear()
        {
            string[] servers = { "192.168.1.113:11211", "192.168.202.128:11211" };

            //初始化池
            SockIOPool pool = SockIOPool.GetInstance();
            pool.SetServers(servers);
            pool.InitConnections = 3;
            pool.MinConnections = 3;
            pool.MaxConnections = 5;
            pool.SocketConnectTimeout = 1000;
            pool.SocketTimeout = 3000;
            pool.MaintenanceSleep = 30;
            pool.Failover = true;
            pool.Nagle = false;
            pool.Initialize();
            MemcachedClient mc = new Memcached.ClientLibrary.MemcachedClient();
            mc.EnableCompression = false;
            mc.Delete("cache");
            mc.Delete("endCache");
            Response.Write("清空缓存成功");
        }

        public void test()
        {
            //分布Memcachedf服务IP 端口
            string[] servers = { "192.168.1.113:11211", "192.168.202.128:11211" };

            //初始化池
            SockIOPool pool = SockIOPool.GetInstance();
            pool.SetServers(servers);
            pool.InitConnections = 3;
            pool.MinConnections = 3;
            pool.MaxConnections = 5;
            pool.SocketConnectTimeout = 1000;
            pool.SocketTimeout = 3000;
            pool.MaintenanceSleep = 30;
            pool.Failover = true;
            pool.Nagle = false;
            pool.Initialize();
            //客户端实例
            MemcachedClient mc = new Memcached.ClientLibrary.MemcachedClient();
            mc.EnableCompression = false;
            StringBuilder sb = new StringBuilder();
            //写入缓存
            sb.AppendLine("写入缓存测试：");
            sb.AppendLine("<br>_______________________________________<br>");
            if (mc.KeyExists("cache"))
            {
                sb.AppendLine("缓存cache已存在");
            }
            else
            {
                mc.Set("cache", "写入缓存时间：" +DateTime.Now.ToString());
                sb.AppendLine("缓存已成功写入到cache");
            }
            sb.AppendLine("<br>_______________________________________<br>");
            sb.AppendLine("读取缓存内容如下：<br>");
            sb.AppendLine(mc.Get("cache").ToString());

            //测试缓存过期
            sb.AppendLine("<br>_______________________________________<br>");
            if (mc.KeyExists("endCache"))
            {
                sb.AppendLine("缓存endCache已存在，过期时间为：" +  mc.Get("endCache").ToString());
            }
            else
            {
                mc.Set("endCache", DateTime.Now.AddMinutes(1).ToString(), DateTime.Now.AddMinutes(1));
                sb.AppendLine("缓存已更新写入到endCache，写入时间：" + DateTime.Now.ToString()  +" 过期时间：" +  DateTime.Now.AddMinutes(1).ToString());
            }

            //分析缓存状态
            Hashtable ht = mc.Stats();
            sb.AppendLine("<br>_______________________________________<br>");
            sb.AppendLine("Memcached Stats:");
            sb.AppendLine("<br>_______________________________________<br>");
            foreach (DictionaryEntry de in ht)
            {
                Hashtable info = (Hashtable)de.Value;
                foreach (DictionaryEntry de2 in info)
                {
                    sb.AppendLine(de2.Key.ToString() + ":    " + de2.Value.ToString() + "<br>");
                }
            }
            Response.Write(sb.ToString());
        }
    }
}