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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;
import java.io.File;
import java.util.concurrent.ExecutorService;
import java.util.regex.Pattern;
/**
* A <b>Host</b> 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
*/
public interface Host extends Container {
// ----------------------------------------------------- Manifest Constants
/**
* The ContainerEvent event type sent when a new alias is added
* by <code>addAlias()</code>.
*/
public static final String ADD_ALIAS_EVENT = "addAlias";
/**
* The ContainerEvent event type sent when an old alias is removed
* by <code>removeAlias()</code>.
*/
public static final String REMOVE_ALIAS_EVENT = "removeAlias";
// ------------------------------------------------------------- Properties
/**
* @return the XML root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
* If null, the base path defaults to
* ${catalina.base}/conf/&lt;engine name&gt;/&lt;host name&gt; directory
*/
public String getXmlBase();
/**
* Set the Xml root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
* If null, the base path defaults to
* ${catalina.base}/conf/&lt;engine name&gt;/&lt;host name&gt; directory
* @param xmlBase The new XML root
*/
public void setXmlBase(String xmlBase);
/**
* @return a default configuration path of this Host. The file will be
* canonical if possible.
*/
public File getConfigBaseFile();
/**
* @return the application root for this Host. This can be an absolute
* pathname, a relative pathname, or a URL.
*/
public String getAppBase();
/**
* @return an absolute {@link File} for the appBase of this Host. The file
* will be canonical if possible. There is no guarantee that that the
* appBase exists.
*/
public File getAppBaseFile();
/**
* 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 discovered 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 discovered 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 regular expression that defines the files and directories in
* the host's appBase that will be ignored by the automatic deployment
* process.
*/
public String getDeployIgnore();
/**
* @return the compiled regular expression that defines the files and
* directories in the host's appBase that will be ignored by the automatic
* deployment process.
*/
public Pattern getDeployIgnorePattern();
/**
* Set the regular expression that defines the files and directories in
* the host's appBase that will be ignored by the automatic deployment
* process.
*
* @param deployIgnore A regular expression matching file names
*/
public void setDeployIgnore(String deployIgnore);
/**
* @return the executor that is used for starting and stopping contexts. This
* is primarily for use by components deploying contexts that want to do
* this in a multi-threaded manner.
*/
public ExecutorService getStartStopExecutor();
/**
* Returns <code>true</code> if the Host will attempt to create directories for appBase and xmlBase
* unless they already exist.
* @return true if the Host will attempt to create directories
*/
public boolean getCreateDirs();
/**
* Should the Host attempt to create directories for xmlBase and appBase
* upon startup.
*
* @param createDirs The new value for this flag
*/
public void setCreateDirs(boolean createDirs);
/**
* @return <code>true</code> of the Host is configured to automatically undeploy old
* versions of applications deployed using parallel deployment. This only
* takes effect is {@link #getAutoDeploy()} also returns <code>true</code>.
*/
public boolean getUndeployOldVersions();
/**
* Set to <code>true</code> if the Host should automatically undeploy old versions of
* applications deployed using parallel deployment. This only takes effect
* if {@link #getAutoDeploy()} returns <code>true</code>.
*
* @param undeployOldVersions The new value for this flag
*/
public void setUndeployOldVersions(boolean undeployOldVersions);
// --------------------------------------------------------- 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();
/**
* Remove the specified alias name from the aliases for this Host.
*
* @param alias Alias name to be removed
*/
public void removeAlias(String alias);
}