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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.catalina;

A Cluster works as a Cluster client/server for the local host
Different Cluster implementations can be used to support different
ways to communicate within the Cluster. A Cluster implementation is
responsible for setting up a way to communicate within the Cluster
and also supply "ClientApplications" with ClusterSender
used when sending information in the Cluster and
ClusterInfo used for receiving information in the Cluster.
Author:
Bip Thelin, Remy Maucherat/**
 * A <b>Cluster</b> works as a Cluster client/server for the local host
 * Different Cluster implementations can be used to support different
 * ways to communicate within the Cluster. A Cluster implementation is
 * responsible for setting up a way to communicate within the Cluster
 * and also supply "ClientApplications" with <code>ClusterSender</code>
 * used when sending information in the Cluster and
 * <code>ClusterInfo</code> used for receiving information in the Cluster.
 *
 * @author Bip Thelin
 * @author Remy Maucherat
 */
public interface Cluster extends Contained {

    
Return the name of the cluster that this Server is currently
configured to operate within.
Returns:
The name of the cluster associated with this server/**
     * Return the name of the cluster that this Server is currently
     * configured to operate within.
     *
     * @return The name of the cluster associated with this server
     */
    public String getClusterName();


    
Set the name of the cluster to join, if no cluster with
this name is present create one.
Params:
clusterName – The clustername to join/**
     * Set the name of the cluster to join, if no cluster with
     * this name is present create one.
     *
     * @param clusterName The clustername to join
     */
    public void setClusterName(String clusterName);


    
Create a new manager which will use this cluster to replicate its
sessions.
Params:
name – Name (key) of the application with which the manager is
associated
Returns:
The newly created Manager instance/**
     * Create a new manager which will use this cluster to replicate its
     * sessions.
     *
     * @param name Name (key) of the application with which the manager is
     * associated
     *
     * @return The newly created Manager instance
     */
    public Manager createManager(String name);


    
Register a manager with the cluster. If the cluster is not responsible
for creating a manager, then the container will at least notify the
cluster that this manager is participating in the cluster.
Params:
manager – Manager/**
     * Register a manager with the cluster. If the cluster is not responsible
     * for creating a manager, then the container will at least notify the
     * cluster that this manager is participating in the cluster.
     * @param manager Manager
     */
    public void registerManager(Manager manager);


    
Removes a manager from the cluster
Params:
manager – Manager/**
     * Removes a manager from the cluster
     * @param manager Manager
     */
    public void removeManager(Manager manager);


    
Execute a periodic task, such as reloading, etc. This method will be
invoked inside the classloading context of this container. Unexpected
throwables will be caught and logged.
/**
     * Execute a periodic task, such as reloading, etc. This method will be
     * invoked inside the classloading context of this container. Unexpected
     * throwables will be caught and logged.
     */
    public void backgroundProcess();
}