# Package org.apache.catalina.ha.session

- Interface Summary
  Interface | Description
  --- | ---
  ReplicatedSessionListener | This is a marker interface used to indicate an implementation of `SessionListener` that should be replicated with the session across the cluster.
  SessionMessage | Class Description: The SessionMessage class is a class that is used when a session has been created, modified, expired in a Tomcat cluster node.

- Class Summary
  Class | Description
  --- | ---
  BackupManager |
  ClusterManagerBase |
  ClusterSessionListener | Receive replicated SessionMessage form other cluster node.
  DeltaManager | The DeltaManager manages replicated sessions by only replicating the deltas in data.
  DeltaRequest |
  DeltaSession | Similar to the StandardSession except that this session will keep track of deltas during a request.
  JvmRouteBinderValve | Valve to handle Tomcat jvmRoute takeover using mod_jk module after node failure.
  SessionMessageImpl | Session cluster message

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