tomcat源码阅读4

org.apache.catalina.cluster 包

该包包含集群相关的代码(Cluster)，集群的基类是实现了org.apache.catalina.Cluster并实现了集群协议的类。 仅有的集群协议是基于JGCluster.java 类的JavaGroups。

CatalinaCluster	A CatalinaCluster interface allows to plug in and out the different cluster implementations 该接口允许嵌入或嵌出不同的不同的集群实现
ClusterDeployer	无内容
ClusterManager	The common interface used by all cluster manager. 所有集群管理器的常用接口
ClusterMessage	无内容
ClusterReceiver	Cluster Receiver Interface 集群接收器接口
ClusterSender	无内容
ClusterSession	无内容
ClusterValve	Cluster Valve Interface to mark all Cluster Valves Only those Valve can'be configured as Cluster Valves （这个doc写的真差，读者自个琢磨吧，我没有琢磨明白）
Member	The Member interface, defines a member in the Cluster. 定义了集群中的成员
MembershipListener	The MembershipListener interface is used as a callback to the membership service. 该接口用于成员服务的回调
MembershipService	The membership service helps the cluster determine the membership logic in the cluster. 用于帮助集群确定成员的逻辑关系
MessageListener	无内容