Tomcat6.x+memcached集群session管理(memcached-session-manager)
1.开源项目地址：
https://github.com/magro/memcached-session-manager
2.所需jar文件列表
3.配置
3.1将以上文件复制到tomcat的lib目录下
配置tomcat context.xml
在每台tomcat 都配置context.xml文件并在<Context>节点下增加如下配置：（两种模式二选一，推荐非黏性模式）
non-sticky模式（非黏性）: tomcat session 为 中转session， memcached1 为主 sessionmemcached 2 为备session
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager" <span style="white-space:pre"> </span>memcachedNodes="n1:192.168.150.135:11211,n2:192.168.150.136:11211" <span style="white-space:pre"> </span>requestUriIgnorePattern=".*/.(png|gif|jpg|css|js)$" <span style="white-space:pre"> </span>sessionBackupAsync="false" <span style="white-space:pre"> </span>sessionBackupTimeout="100" <span style="white-space:pre"> </span>transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory" <span style="white-space:pre"> </span>copyCollectionsForSerialization="false"/> <Context>
sticky模式（黏性）: tomcat session 为 主 session ， memcached 为备 session
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="<span style="font-family: Arial, Helvetica, sans-serif;">n1:192.168.150.135:11211,n2:192.168.150.136:11211</span><span style="font-family: Arial, Helvetica, sans-serif;">"</span><span style="font-family: Arial, Helvetica, sans-serif;"> </span><span style="font-family: Arial, Helvetica, sans-serif;">
</span> failoverNodes="n2"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
4.测试
将以下jsp页面放置到每台tomcat容器下，使用nginx做负载访问
<%@ page contentType="text/html; charset=utf-8" %>
<%@ page import="java.util.*" %>
<html><head><title>Cluster App Test</title></head>
<body>
Server Info:
<%
out.println(request.getLocalAddr() + " : " + request.getLocalPort()+"<br>");%>
<%
out.println("<br> ID " + session.getId()+"<br>");
// 如果有新的 Session 属性设置
String dataName = request.getParameter("dataName");
if (dataName != null && dataName.length() > 0) {
String dataValue = request.getParameter("dataValue");
session.setAttribute(dataName, dataValue);
}
out.print("<b>Session 列表</b>");
Enumeration e = session.getAttributeNames();
while (e.hasMoreElements()) {
String name = (String)e.nextElement();
String value = session.getAttribute(name).toString();
out.println( name + " = " + value+"<br>");
System.out.println( name + " = " + value);
}
%>
<form action="test.jsp" method="POST">
名称:<input type=text size=20 name="dataName">
<br>
值:<input type=text size=20 name="dataValue">
<br>
<input type=submit>
</form>
</body>
</html>
结果：我们可以看到通过nginx访问到两台tomcat上的页面，但是session确是相同的
ps:nginx做负载请参考我的文章：
http://blog.csdn.net/caicongyang/article/details/46388845
http://blog.csdn.net/caicongyang/article/details/46444007
我的个人网站：http://www.caicongyang.com
我的CSDN博客地址： http://blog.csdn.net/caicongyang