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package org.apache.catalina;
import java.io.IOException;
import java.net.URL;
/**
* A <b>Deployer</b> is a specialized Container into which web applications
* can be deployed and undeployed. Such a Container will create and install
* child Context instances for each deployed application. The unique key
* for each web application will be the context path to which it is attached.
*
* @author Craig R. McClanahan
* @version $Revision: 1.3 $ $Date: 2007/05/05 05:31:51 $
*/
/* public interface Deployer extends Container { */
public interface Deployer {
// ----------------------------------------------------- Manifest Constants
/**
* The ContainerEvent event type sent when a new application is
* being installed by <code>install()</code>, before it has been
* started.
*/
public static final String PRE_INSTALL_EVENT = "pre-install";
/**
* The ContainerEvent event type sent when a new application is
* installed by <code>install()</code>, after it has been started.
*/
public static final String INSTALL_EVENT = "install";
/**
* The ContainerEvent event type sent when an existing application is
* removed by <code>remove()</code>.
*/
public static final String REMOVE_EVENT = "remove";
// --------------------------------------------------------- Public Methods
/**
* Return the name of the Container with which this Deployer is associated.
*/
public String getName();
/**
* Install a new web application, whose web application archive is at the
* specified URL, into this container with the specified context path.
* A context path of "" (the empty string) should be used for the root
* application for this container. Otherwise, the context path must
* start with a slash.
* <p>
* If this application is successfully installed, a ContainerEvent of type
* <code>INSTALL_EVENT</code> will be sent to all registered listeners,
* with the newly created <code>Context</code> as an argument.
*
* @param contextPath The context path to which this application should
* be installed (must be unique)
* @param war A URL of type "jar:" that points to a WAR file, or type
* "file:" that points to an unpacked directory structure containing
* the web application to be installed
*
* @exception IllegalArgumentException if the specified context path
* is malformed (it must be "" or start with a slash)
* @exception IllegalStateException if the specified context path
* is already attached to an existing web application
* @exception IOException if an input/output error was encountered
* during installation
*/
public void install(String contextPath, URL war) throws IOException;
/**
* <p>Install a new web application, whose context configuration file
* (consisting of a <code><Context></code> element) and web
* application archive are at the specified URLs.</p>
*
* <p>If this application is successfully installed, a ContainerEvent
* of type <code>INSTALL_EVENT</code> will be sent to all registered
* listeners, with the newly created <code>Context</code> as an argument.
* </p>
*
* @param config A URL that points to the context configuration file to
* be used for configuring the new Context
* @param war A URL of type "jar:" that points to a WAR file, or type
* "file:" that points to an unpacked directory structure containing
* the web application to be installed
*
* @exception IllegalArgumentException if one of the specified URLs is
* null
* @exception IllegalStateException if the context path specified in the
* context configuration file is already attached to an existing web
* application
* @exception IOException if an input/output error was encountered
* during installation
*/
public void install(URL config, URL war) throws IOException;
/**
* Return the Context for the deployed application that is associated
* with the specified context path (if any); otherwise return
* <code>null</code>.
*
* @param contextPath The context path of the requested web application
*/
public Context findDeployedApp(String contextPath);
/**
* Return the context paths of all deployed web applications in this
* Container. If there are no deployed applications, a zero-length
* array is returned.
*/
public String[] findDeployedApps();
/**
* Remove an existing web application, attached to the specified context
* path. If this application is successfully removed, a
* ContainerEvent of type <code>REMOVE_EVENT</code> will be sent to all
* registered listeners, with the removed <code>Context</code> as
* an argument.
*
* @param contextPath The context path of the application to be removed
*
* @exception IllegalArgumentException if the specified context path
* is malformed (it must be "" or start with a slash)
* @exception IllegalArgumentException if the specified context path does
* not identify a currently installed web application
* @exception IOException if an input/output error occurs during
* removal
*/
public void remove(String contextPath) throws IOException;
/**
* Remove an existing web application, attached to the specified context
* path. If this application is successfully removed, a
* ContainerEvent of type <code>REMOVE_EVENT</code> will be sent to all
* registered listeners, with the removed <code>Context</code> as
* an argument. Deletes the web application war file and/or directory
* if they exist in the Host's appBase.
*
* @param contextPath The context path of the application to be removed
* @param undeploy boolean flag to remove web application from server
*
* @exception IllegalArgumentException if the specified context path
* is malformed (it must be "" or start with a slash)
* @exception IllegalArgumentException if the specified context path does
* not identify a currently installed web application
* @exception IOException if an input/output error occurs during
* removal
*/
public void remove(String contextPath, boolean undeploy) throws IOException;
/**
* Start an existing web application, attached to the specified context
* path. Only starts a web application if it is not running.
*
* @param contextPath The context path of the application to be started
*
* @exception IllegalArgumentException if the specified context path
* is malformed (it must be "" or start with a slash)
* @exception IllegalArgumentException if the specified context path does
* not identify a currently installed web application
* @exception IOException if an input/output error occurs during
* startup
*/
public void start(String contextPath) throws IOException;
/**
* Stop an existing web application, attached to the specified context
* path. Only stops a web application if it is running.
*
* @param contextPath The context path of the application to be stopped
*
* @exception IllegalArgumentException if the specified context path
* is malformed (it must be "" or start with a slash)
* @exception IllegalArgumentException if the specified context path does
* not identify a currently installed web application
* @exception IOException if an input/output error occurs while stopping
* the web application
*/
public void stop(String contextPath) throws IOException;
}
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