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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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina;
/**
* 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
* @author Filip Hanik
*
*/
public interface Cluster {
// ------------------------------------------------------------- Properties
/**
* Return descriptive information about this Cluster implementation and
* the corresponding version number, in the format
* <code><description>/<version></code>.
*/
public String getInfo();
/**
* 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.
*
* @param clusterName The clustername to join
*/
public void setClusterName(String clusterName);
/**
* Set the Container associated with our Cluster
*
* @param container The Container to use
*/
public void setContainer(Container container);
/**
* Get the Container associated with our Cluster
*
* @return The Container associated with our Cluster
*/
public Container getContainer();
/**
* Set the protocol parameters.
*
* @param protocol The protocol used by the cluster
* @deprecated
*/
public void setProtocol(String protocol);
/**
* Get the protocol used by the cluster.
*
* @return The protocol
* @deprecated
*/
public String getProtocol();
// --------------------------------------------------------- Public Methods
/**
* 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
*/
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 mananger is participating in the cluster.
* @param manager Manager
*/
public void registerManager(Manager manager);
/**
* Removes a manager from the cluster
* @param manager Manager
*/
public void removeManager(Manager manager);
// --------------------------------------------------------- Cluster Wide Deployments
/**
* 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();
}
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