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Deployer (Catalina Internal API Documentation)

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org.apache.catalina
Interface Deployer

All Superinterfaces:: Container

All Known Implementing Classes:: StandardHost

public interface Deployer
extends Container

A Deployer 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.

Version:: $Revision: 1.4 $ $Date: 2001/07/22 20:13:30 $
Author:: Craig R. McClanahan

Field Summary

static java.lang.String INSTALL_EVENT
          The ContainerEvent event type sent when a new application is installed by install().

static java.lang.String REMOVE_EVENT
          The ContainerEvent event type sent when an existing application is removed by remove().

Fields inherited from interface org.apache.catalina.Container

ADD_CHILD_EVENT, ADD_MAPPER_EVENT, ADD_VALVE_EVENT, REMOVE_CHILD_EVENT, REMOVE_MAPPER_EVENT, REMOVE_VALVE_EVENT

Method Summary

Context findDeployedApp(java.lang.String contextPath)
          Return the Context for the deployed application that is associated with the specified context path (if any); otherwise return null.

java.lang.String[] findDeployedApps()
          Return the context paths of all deployed web applications in this Container.

void install(java.lang.String contextPath, java.net.URL war)
          Install a new web application, whose web application archive is at the specified URL, into this container with the specified context path.

void remove(java.lang.String contextPath)
          Remove an existing web application, attached to the specified context path.

void start(java.lang.String contextPath)
          Start an existing web application, attached to the specified context path.

void stop(java.lang.String contextPath)
          Stop an existing web application, attached to the specified context path.

Methods inherited from interface org.apache.catalina.Container

addChild, addContainerListener, addMapper, addPropertyChangeListener, findChild, findChildren, findMapper, findMappers, getCluster, getInfo, getLoader, getLogger, getManager, getName, getParent, getParentClassLoader, getRealm, getResources, invoke, map, removeChild, removeContainerListener, removeMapper, removePropertyChangeListener, setCluster, setLoader, setLogger, setManager, setName, setParent, setParentClassLoader, setRealm, setResources

Field Detail

INSTALL_EVENT


public static final java.lang.String INSTALL_EVENT

The ContainerEvent event type sent when a new application is installed by install().

See Also:: Constant Field Values

REMOVE_EVENT


public static final java.lang.String REMOVE_EVENT

The ContainerEvent event type sent when an existing application is removed by remove().

See Also:: Constant Field Values

Method Detail

install


public void install(java.lang.String contextPath,
                    java.net.URL war)
             throws java.io.IOException

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.

If this application is successfully installed, a ContainerEvent of type INSTALL_EVENT will be sent to all registered listeners, with the newly created Context as an argument.

Parameters:: contextPath - The context path to which this application should be installed (must be unique); 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
Throws:: java.lang.IllegalArgumentException - if the specified context path is malformed (it must be "" or start with a slash); java.lang.IllegalArgumentException - if the specified context path is already attached to an existing web application; java.io.IOException - if an input/output error was encountered during installation

findDeployedApp


public Context findDeployedApp(java.lang.String contextPath)

Return the Context for the deployed application that is associated with the specified context path (if any); otherwise return null.

Parameters:: contextPath - The context path of the requested web application

findDeployedApps


public java.lang.String[] findDeployedApps()

Return the context paths of all deployed web applications in this Container. If there are no deployed applications, a zero-length array is returned.

remove


public void remove(java.lang.String contextPath)
            throws java.io.IOException

Remove an existing web application, attached to the specified context path. If this application is successfully removed, a ContainerEvent of type REMOVE_EVENT will be sent to all registered listeners, with the removed Context as an argument.

Parameters:: contextPath - The context path of the application to be removed
Throws:: java.lang.IllegalArgumentException - if the specified context path is malformed (it must be "" or start with a slash); java.lang.IllegalArgumentException - if the specified context path does not identify a currently installed web application; java.io.IOException - if an input/output error occurs during removal

start


public void start(java.lang.String contextPath)
           throws java.io.IOException

Start an existing web application, attached to the specified context path. Only starts a web application if it is not running.

Parameters:: contextPath - The context path of the application to be started
Throws:: java.lang.IllegalArgumentException - if the specified context path is malformed (it must be "" or start with a slash); java.lang.IllegalArgumentException - if the specified context path does not identify a currently installed web application; java.io.IOException - if an input/output error occurs during startup

stop


public void stop(java.lang.String contextPath)
          throws java.io.IOException

Stop an existing web application, attached to the specified context path. Only stops a web application if it is running.

Parameters:: contextPath - The context path of the application to be stopped
Throws:: java.lang.IllegalArgumentException - if the specified context path is malformed (it must be "" or start with a slash); java.lang.IllegalArgumentException - if the specified context path does not identify a currently installed web application; java.io.IOException - if an input/output error occurs while stopping the web application