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memcached-session-manager(MSM) + Tomcat集群session共享

2014-08-23 18:59 441 查看
1、创建一个登陆的web项目做测试，名为session

环境 windows + JDK1.6 +两个Tomcat6 + MSM 1.8 + memcached-win32-1.4.4-14

1.1 login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
     <table bgcolor="#F8C3C3" border="1" borderColor="#FF0000"
          align="center" width="260" height="160">
          <tr>
               <td height="15" colspan="2" align="center"
                    style="background-color: #000000; font-size: 28px; color: #FFFF00"><b>用户登录</b></td>
          </tr>
          <form method="post" action="LoginSevlet">
               <tr>
                    <td width="80" align="center"><b>用户名</b></td>
                    <td><input type="text" name="userName" value="" /></td>
               </tr>
               <tr>
                    <td align="center"><b>密 码</b></td>
                    <td><input type="password" name="password" value="" /></td>
               </tr>
               <tr>
                    <td colspan="2" align="center" style="background-color: #000000;">
                         <input type="submit" value="登 录" />  <input type="reset"
                         value="重 置" />
                    </td>
               </tr>
          </form>
     </table>
</body>
</html>


1.2 success.jsp 页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录成功页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<%
     String userName = (String) request.getSession().getAttribute("userName");
%>
<body bgcolor="#000000">
     <table width="500" height="200" align="center" border="1"
          style="background-color: #000000;">
          <tr>
               <td align="center"
                    style="background-color: #F8C3C3; color: #00FF00; font-weight: bold; font-size: 30px">
                    当前登录用户：<%=userName %>
               </td>
          </tr>
     </table>
</body>
</html>


1.3 Servlet 类

package org.shirdrn.cluster.tomcat.servlet;

import java.io.IOException;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginSevlet extends HttpServlet {
	private static final long serialVersionUID = 8278367768726269037L;
	    private static Map<String, String> accountDB = new HashMap<String, String>();  
	    static {  
	         accountDB.put("shirdrn", "123456");  
	         accountDB.put("admin", "999999");  
	         accountDB.put("dev", "000888");  
	         accountDB.put("007", "007007");  
	    }  
	     
	    public LoginSevlet() {  
	        super();  
	    }  
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		 this.doPost(request, response);  
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		String userName = request.getParameter("userName");  
        String password = request.getParameter("password");  
        if(userName!=null && password!=null  
                  && accountDB.containsKey(userName)  
                  && accountDB.get(userName).equals(password)) {  
             request.getSession().setAttribute("userName", userName);  
             request.getRequestDispatcher("success.jsp").forward(request, response);                
        } else {  
             request.getRequestDispatcher("login.jsp").forward(request, response);  
        }  
	}

}


1.4 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">   <servlet>
    <servlet-name>LoginSevlet</servlet-name>
    <servlet-class>org.shirdrn.cluster.tomcat.servlet.LoginSevlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>LoginSevlet</servlet-name>
    <url-pattern>/LoginSevlet</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
</web-app>


1.5 将项目导入session.war包放到两个tomcat的\apache-tomcat-6.0.41\webapps 目录下面。

2、下载memcached-session-manager 相关jar包
jsf-api.jar 和jsf-impl.jar是J2EE 的包，在myeclipse下面可以搜索到。
第二个红区域内的包在http://code.google.com/p/memcached-session-manager下载，memcached-session-manager-tcx.jar，这个是根据你的tomcat来的我的是tomcat6，所以memcached-session-manager-tc6.jar，如果你的是其它版本则自己去下载相应版本有6,7,8三个版本。
spymemcached-2.10.3.jar是在http://spymemcached.googlecode.com下载

将这些jar 包 放到两个 tomcat 的lib 下面。
tomcat启动问题： MemcachedSessionService starts initialization... (configured nodes definition n1:localhost:11211, failover nodes null)

解决方法：加入spymemcached-2.10.3.jar
3、修改两个tomcat 配置文件

3.1 Tomcat 1 /conf/server.xml

第一个地方：<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">

第二个地方： </Host> 标签内添加下面内容，端口号默认不改。

<Context docBase="/session.war" path="/session" reloadable="true">  
 <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"  
					memcachedNodes="n1:localhost:11211,n2:localhost:11311"
					<span style="color:#ff6666;">failoverNodes="n1"</span> 
					requestUriIgnorePattern=".*\.(png|gif|jpg|css|js)$"  
					sessionBackupAsync="false"  
					sessionBackupTimeout="100"  
	 transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"  
	 copyCollectionsForSerialization="false" />  
 </Context>


3.2 Tomcat 2 /conf/server.xml

第一个地方：改端口号

<Server port="8006" shutdown="SHUTDOWN">

<Connector port="8081" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />

<Connector port="8089" protocol="AJP/1.3" redirectPort="8443" />

第二个地方：<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2">

第三个地方： </Host> 标签内添加下面内容

<Context docBase="/session.war" path="/session" reloadable="true">  
 <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"  
					memcachedNodes="n1:localhost:11211,n2:localhost:11311"
					<span style="color:#ff6666;">failoverNodes="n2"</span> 
					requestUriIgnorePattern=".*\.(png|gif|jpg|css|js)$"  
					sessionBackupAsync="false"  
					sessionBackupTimeout="100"  
	 transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"  
	 copyCollectionsForSerialization="false" />  
 </Context>


tomcat1与tomcat2配置区别就是红色的地方，其它默认。

4、启动memcached

4.1 本机是winows 系统启动两个memcached 需要改端口号,假设Memcached在如下目录：D:\memcached-win32-1.4.4-14，后面我会上传到资源库中。

4.2在CMD中执行如下命令即可再安装一个Memcached服务（记得换个端口号啊！）：

sc create "Memcached Server1" start= auto binPath= "D:\memcached-win32-1.4.4-14\memcached.exe -d runservice -m 32 -p 11311 -l localhost" DisplayName= "Memcached Server1"

4.3.下面是启动、停止、卸载该服务的命令：

sc start "Memcached Server1" //启动

sc stop "Memcached Server1" //停止

sc delete "Memcached Server1" //卸载该服务

4.4 启动成功后进程里面会有两个 memcached.exe

5.启动tomcat1和tomcat2

5.1 启动不报错后,我们再来测试两个tomcat之间的数据共享。首先访问tomcat1的 http://localhost:8080/session/login.jsp 用户名 admin 密码 999999 登陆成功后跳转到success.jsp页面显示 当前登录用户：admin
,然后我们关闭tomcat1 , tomcat2不要关闭了。





5.2 访问tomcat2的 http://localhost:8081/session/success.jsp ,也显示 ”当前登陆用户：admin, tomcat 2 我都没有登陆，直接进入到success.jsp竟然也能显示与tomcat1登陆后信息一样，说明 tomcat1 当机了之后，tomcat2 能从memcached 取 tomcat1 保存的信息，从而实现session共享了。



代码是copy别人的，具体的自己引入到eclipse中看。

6. 免费下载链接

1、memcached-win32-1.4.4-14.zip

2、MSM1.8集群相关jar包

3、session.war 项目包
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