配置使用tomcat的session集中存储

session存储

集群中有4种存储session的方式

1. Session Sticky 。 每次请求都到一台机子中去
2. Session Replication 每个容器对session进行同步复制
3. Session数据集中存储 使用redis
4. Cookie Based 数据放到cookie中传输

tomcat中配置Session Replication

1. tomcat复制2份 端口勿冲突,不需要做任何修改，在这一行的下面加入如下代码：

   -- tomcat中有这么一行代码，打开注释即可
     <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"  
                     channelSendOptions="8">  
       
              <Manager className="org.apache.catalina.ha.session.DeltaManager"  
                       expireSessionsOnShutdown="false"  
                       notifyListenersOnReplication="true"/>  
       
              <Channel className="org.apache.catalina.tribes.group.GroupChannel">  
                <Membership className="org.apache.catalina.tribes.membership.McastService"  
                            address="228.0.0.4"  
                            port="45564"  
                            frequency="500"  
                            dropTime="3000"/>  
                <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"  
                          address="auto"  
                          port="4000"  
                          autoBind="100"  
                          selectorTimeout="5000"  
                          maxThreads="6"/>  
       
                <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">  
                <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>  
                </Sender>  
                <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>  
                <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>  
              </Channel>  
       
              <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"  
                     filter=""/>  
              <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>  
       
              <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"  
                        tempDir="/tmp/war-temp/"  
                        deployDir="/tmp/war-deploy/"  
                        watchDir="/tmp/war-listen/"  
                        watchEnabled="false"/>  
       
              <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>  
              <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>  
            </Cluster>