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Tomcat example source code file (Cluster.java)

This example Tomcat source code file (Cluster.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

cluster, cluster, container, container, manager, manager, string, string

The Tomcat Cluster.java source code

/*
 * 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 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
 * used when sending information in the Cluster and
 * <code>ClusterInfo used for receiving information in the Cluster.
 *
 * @author Bip Thelin
 * @author Remy Maucherat
 * @author Filip Hanik
 * @version $Revision: 500684 $, $Date: 2007-01-28 00:27:18 +0100 (dim., 28 janv. 2007) $
 */

public interface Cluster {

    // ------------------------------------------------------------- Properties

    /**
     * Return descriptive information about this Cluster implementation and
     * the corresponding version number, in the format
     * <code><description>/<version>.
     */
    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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