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Tomcat example source code file (Host.java)

This example Tomcat source code file (Host.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

add_alias_event, add_alias_event, container, context, context, host, remove_alias_event, remove_alias_event, string, string

The Tomcat Host.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>Host is a Container that represents a virtual host in the
 * Catalina servlet engine.  It is useful in the following types of scenarios:
 * <ul>
 * <li>You wish to use Interceptors that see every single request processed
 *     by this particular virtual host.
 * <li>You wish to run Catalina in with a standalone HTTP connector, but still
 *     want support for multiple virtual hosts.
 * </ul>
 * In general, you would not use a Host when deploying Catalina connected
 * to a web server (such as Apache), because the Connector will have
 * utilized the web server's facilities to determine which Context (or
 * perhaps even which Wrapper) should be utilized to process this request.
 * <p>
 * The parent Container attached to a Host is generally an Engine, but may
 * be some other implementation, or may be omitted if it is not necessary.
 * <p>
 * The child containers attached to a Host are generally implementations
 * of Context (representing an individual servlet context).
 *
 * @author Craig R. McClanahan
 * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public interface Host extends Container {


    // ----------------------------------------------------- Manifest Constants


    /**
     * The ContainerEvent event type sent when a new alias is added
     * by <code>addAlias().
     */
    public static final String ADD_ALIAS_EVENT = "addAlias";


    /**
     * The ContainerEvent event type sent when an old alias is removed
     * by <code>removeAlias().
     */
    public static final String REMOVE_ALIAS_EVENT = "removeAlias";


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


    /**
     * Return the application root for this Host.  This can be an absolute
     * pathname, a relative pathname, or a URL.
     */
    public String getAppBase();


    /**
     * Set the application root for this Host.  This can be an absolute
     * pathname, a relative pathname, or a URL.
     *
     * @param appBase The new application root
     */
    public void setAppBase(String appBase);


    /**
     * Return the value of the auto deploy flag.  If true, it indicates that 
     * this host's child webapps should be discovred and automatically 
     * deployed dynamically.
     */
    public boolean getAutoDeploy();


    /**
     * Set the auto deploy flag value for this host.
     * 
     * @param autoDeploy The new auto deploy flag
     */
    public void setAutoDeploy(boolean autoDeploy);


    /**
     * Return the Java class name of the context configuration class
     * for new web applications.
     */
    public String getConfigClass();

    
    /**
     * Set the Java class name of the context configuration class
     * for new web applications.
     *
     * @param configClass The new context configuration class
     */
    public void setConfigClass(String configClass);

        
    /**
     * Return the value of the deploy on startup flag.  If true, it indicates 
     * that this host's child webapps should be discovred and automatically 
     * deployed.
     */
    public boolean getDeployOnStartup();


    /**
     * Set the deploy on startup flag value for this host.
     * 
     * @param deployOnStartup The new deploy on startup flag
     */
    public void setDeployOnStartup(boolean deployOnStartup);


    /**
     * Return the canonical, fully qualified, name of the virtual host
     * this Container represents.
     */
    public String getName();


    /**
     * Set the canonical, fully qualified, name of the virtual host
     * this Container represents.
     *
     * @param name Virtual host name
     *
     * @exception IllegalArgumentException if name is null
     */
    public void setName(String name);


    /**
     * Get the server.xml <host> attribute's xmlNamespaceAware.
     * @return true if namespace awarenes is enabled.
     *
     */
    public boolean getXmlNamespaceAware();


    /**
     * Get the server.xml <host> attribute's xmlValidation.
     * @return true if validation is enabled.
     *
     */
    public boolean getXmlValidation();


    /**
     * Set the validation feature of the XML parser used when
     * parsing xml instances.
     * @param xmlValidation true to enable xml instance validation
     */
    public void setXmlValidation(boolean xmlValidation);


   /**
     * Set the namespace aware feature of the XML parser used when
     * parsing xml instances.
     * @param xmlNamespaceAware true to enable namespace awareness
     */
    public void setXmlNamespaceAware(boolean xmlNamespaceAware);


    // --------------------------------------------------------- Public Methods


    /**
     * Add an alias name that should be mapped to this same Host.
     *
     * @param alias The alias to be added
     */
    public void addAlias(String alias);


    /**
     * Return the set of alias names for this Host.  If none are defined,
     * a zero length array is returned.
     */
    public String[] findAliases();


    /**
     * Return the Context that would be used to process the specified
     * host-relative request URI, if any; otherwise return <code>null.
     *
     * @param uri Request URI to be mapped
     */
    public Context map(String uri);


    /**
     * Remove the specified alias name from the aliases for this Host.
     *
     * @param alias Alias name to be removed
     */
    public void removeAlias(String alias);


}

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