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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2009, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.modcluster.container;

/**
 * SPI for an engine, defined as collection of one or more hosts associated with a collection of Connectors. The only Connector
 * of significance is the one used to communicate with a proxy.
 * 
 * @author Paul Ferraro
 */
public interface Engine {
    /**
     * The name of this engine.
     * 
     * @return the engine name
     */
    String getName();

    /**
     * The server to which this engine is associated.
     * 
     * @return a server.
     */
    Server getServer();

    /**
     * The hosts associated with this engine.
     * 
     * @return the engine's hosts.
     */
    Iterable getHosts();

    /**
     * The connector to which this engine uses to communicate with its proxies.
     * 
     * @return the connector used by mod_cluster
     */
    Connector getProxyConnector();

    /**
     * The connector to which this engine uses to communicate with its proxies.
     * 
     * @return the connector used by mod_cluster
     */
    Iterable getConnectors();

    /**
     * The jvm route of this servlet engine. This uniquely identifies this node within the proxy.
     * 
     * @return the servlet engine's jvm route
     */
    String getJvmRoute();

    /**
     * Set this jvm route for this servlet engine. Used to create a reasonable default value, if no explicit route is defined.
     * 
     * @param jvmRoute a unique jvm route.
     */
    void setJvmRoute(String jvmRoute);

    /**
     * Returns the host identified by the specified host name.
     * 
     * @param name the host name
     * @return a servlet engine host
     */
    Host findHost(String name);

    /**
     * Returns the cookie name used for sessions.
     * 
     * @return a cookie name
     */
    String getSessionCookieName();

    /**
     * Returns the url parameter name used for sessions.
     * 
     * @return a parameter name
     */
    String getSessionParameterName();

    /**
     * Returns the default host of this engine.
     * @return the default host
     */
    String getDefaultHost();
}