Jade Dungeon

Tomcat Session共享

通过memcached共享session
- 相关的jar包
- session 配置
通过redis共享session
- 相关jar包
- Tomcat配置

通过memcached共享session

相关的jar包

tomcat 6：memcached-session-manager-tc6
tomcat 7：memcached-session-manager-tc7

		<dependency>
			<groupId>de.javakaffee.msm</groupId>
			<artifactId>memcached-session-manager-tc6</artifactId>
			<version>1.8.2</version>
		</dependency>

还有如果要用kryo来替换java默认的序列化方法（推荐），还需要：

		<dependency>
			<groupId>de.javakaffee.msm</groupId>
			<artifactId>memcached-session-manager-tc6</artifactId>
			<version>1.8.2</version>
		</dependency>
		<dependency>
			<groupId>de.javakaffee.msm</groupId>
			<artifactId>msm-kryo-serializer</artifactId>
			<version>1.8.2</version>
		</dependency>
		<dependency>
			<groupId>de.javakaffee</groupId>
			<artifactId>kryo-serializers</artifactId>
			<version>0.11</version>
		</dependency>
		<dependency>
			<groupId>com.googlecode</groupId>
			<artifactId>kryo</artifactId>
			<version>1.04</version>
		</dependency>

通过maven取出并不一定全要，可以取以下部分放到CATALINA_BASE/lib：

memcached-session-manager-1.8.2.jar
memcached-session-manager-tc6-1.8.2.jar
spymemcached-2.11.1.jar
commons-codec-1.5.jar
couchbase-client-1.4.0.jar
kryo-1.04.jar
kryo-serializers-0.11.jar
msm-kryo-serializer-1.8.2.jar
minlog-1.2.jar
reflectasm-1.01.jar
asm-3.2.jar

session 配置

修改$CATALINA_BASE/conf/context.xml，比如用kryo来序列化Session。注意如果是多个tomcat共享session的话就一定要选择非粘着（none-sticky）Session：

<Context>
  ...
  <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
    memcachedNodes="n1:host1.yourdomain.com:11211,n2:host2.yourdomain.com:11211"
    sticky="false"
    sessionBackupAsync="false"
    lockingMode="uriPattern:/path1|/path2"
    requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
    transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
    />
</Context>

通过观察页面上显示的SessionId来看是不是同一个Session：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
		<title>Test Session Page</title>
	</head>
	<body>
		This is A : ${pageContext.session.id}
	</body>
</html>

参考：

通过redis共享session

redis+tomcat-sessoin-manager

Tomcat配置

$CATALINA_BASE/conf/context.xml：

<Context>

<!-- ... --->

<Valve 
	className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
<Manager 
	className="com.orangefunction.tomcat.redissessions.RedisSessionManager"  
	host="127.0.0.1"  port="6379"  database="0"  maxInactiveInterval="60" />

<!-- ... --->

</Context>