org.apache.catalina.servlets
Class ManagerServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--org.apache.catalina.servlets.ManagerServlet

All Implemented Interfaces:

ContainerServlet, java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

HTMLManagerServlet

public class ManagerServlet

extends javax.servlet.http.HttpServlet

implements ContainerServlet

Servlet that enables remote management of the web applications installed within the same virtual host as this web application is. Normally, this functionality will be protected by a security constraint in the web application deployment descriptor. However, this requirement can be relaxed during testing.

This servlet examines the value returned by getPathInfo() and related query parameters to determine what action is being requested. The following actions and parameters (starting after the servlet path) are supported:

• /install?path=/xxx&war={war-url} - Install and start a new web application attached to context path /xxx, based on the contents of the web application archive found at the specified URL.
• /list - List the context paths of all currently installed web applications for this virtual host. Each context will be listed with the following format path:status:sessions. Where path is the context path. Status is either running or stopped. Sessions is the number of active Sessions.
• /reload?path=/xxx - Reload the Java classes and resources for the application at the specified path, but do not reread the web.xml configuration files.
• /remove?path=/xxx - Shutdown and remove the web application attached to context path /xxx for this virtual host.
• /sessions?path=/xxx - List session information about the web application attached to context path /xxx for this virtual host.
• /start?path=/xxx - Start the web application attached to context path /xxx for this virtual host.
• /stop?path=/xxx - Stop the web application attached to context path /xxx for this virtual host.

Use path=/ for the ROOT context.

The syntax of the URL for a web application archive must conform to one of the following patterns to be successfully deployed:

• file:/absolute/path/to/a/directory - You can specify the absolute path of a directory that contains the unpacked version of a web application. This directory will be attached to the context path you specify without any changes.
• jar:file:/absolute/path/to/a/warfile.war!/ - You can specify a URL to a local web application archive file. The syntax must conform to the rules specified by the JarURLConnection class for a reference to an entire JAR file.
• jar:http://hostname:port/path/to/a/warfile.war!/ - You can specify a URL to a remote (HTTP-accessible) web application archive file. The syntax must conform to the rules specified by the JarURLConnection class for a reference to an entire JAR file.

NOTE - Attempting to reload or remove the application containing this servlet itself will not succeed. Therefore, this servlet should generally be deployed as a separate web application within the virtual host to be managed.

NOTE - For security reasons, this application will not operate when accessed via the invoker servlet. You must explicitly map this servlet with a servlet mapping, and you will always want to protect it with appropriate security constraints as well.

The following servlet initialization parameters are recognized:

• debug - The debugging detail level that controls the amount of information that is logged by this servlet. Default is zero.

Version:

$Revision: 1.9 $ $Date: 2001/09/15 23:31:30 $

Author:

Craig R. McClanahan

See Also:

Serialized Form

Field Summary

protected Context	context The Context container associated with our web application.
protected int	debug The debugging detail level for this servlet.
protected Deployer	deployer The Deployer container that contains our own web application's Context, along with the associated Contexts for web applications that we are managing.
protected static StringManager	sm The string manager for this package.
protected Wrapper	wrapper The Wrapper container associated with this servlet.

Constructor Summary

ManagerServlet()

Method Summary

void	destroy() Finalize this servlet.
void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Process a GET request for the specified resource.
Wrapper	getWrapper() Return the Wrapper with which we are associated.
void	init() Initialize this servlet.
protected void	install(java.io.PrintWriter writer, java.lang.String path, java.lang.String war) Install an application for the specified path from the specified web application archive.
protected void	list(java.io.PrintWriter writer) Render a list of the currently active Contexts in our virtual host.
protected void	reload(java.io.PrintWriter writer, java.lang.String path) Reload the web application at the specified context path.
protected void	remove(java.io.PrintWriter writer, java.lang.String path) Remove the web application at the specified context path.
protected void	sessions(java.io.PrintWriter writer, java.lang.String path) Session information for the web application at the specified context path.
void	setWrapper(Wrapper wrapper) Set the Wrapper with which we are associated.
protected void	start(java.io.PrintWriter writer, java.lang.String path) Start the web application at the specified context path.
protected void	stop(java.io.PrintWriter writer, java.lang.String path) Stop the web application at the specified context path.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

context

protected Context context

The Context container associated with our web application.

debug

protected int debug

The debugging detail level for this servlet.

deployer

protected Deployer deployer

The Deployer container that contains our own web application's Context, along with the associated Contexts for web applications that we are managing.

sm

protected static StringManager sm

The string manager for this package.

wrapper

protected Wrapper wrapper

The Wrapper container associated with this servlet.

Constructor Detail

ManagerServlet

public ManagerServlet()

Method Detail

getWrapper

public Wrapper getWrapper()

Return the Wrapper with which we are associated.

Specified by:

getWrapper in interface ContainerServlet

setWrapper

public void setWrapper(Wrapper wrapper)

Set the Wrapper with which we are associated.

Specified by:

setWrapper in interface ContainerServlet

Parameters:

wrapper - The new wrapper

destroy

public void destroy()

Finalize this servlet.

Specified by:

destroy in interface javax.servlet.Servlet

Overrides:

destroy in class javax.servlet.GenericServlet

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws java.io.IOException,
                  javax.servlet.ServletException

Process a GET request for the specified resource.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

request - The servlet request we are processing

response - The servlet response we are creating

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet-specified error occurs

init

public void init()
          throws javax.servlet.ServletException

Initialize this servlet.

Overrides:

init in class javax.servlet.GenericServlet

javax.servlet.ServletException

install

protected void install(java.io.PrintWriter writer,
                       java.lang.String path,
                       java.lang.String war)

Install an application for the specified path from the specified web application archive.

Parameters:

writer - Writer to render results to

path - Context path of the application to be installed

war - URL of the web application archive to be installed

list

protected void list(java.io.PrintWriter writer)

Render a list of the currently active Contexts in our virtual host.

Parameters:

writer - Writer to render to

reload

protected void reload(java.io.PrintWriter writer,
                      java.lang.String path)

Reload the web application at the specified context path.

Parameters:

writer - Writer to render to

path - Context path of the application to be restarted

remove

protected void remove(java.io.PrintWriter writer,
                      java.lang.String path)

Remove the web application at the specified context path.

Parameters:

writer - Writer to render to

path - Context path of the application to be removed

sessions

protected void sessions(java.io.PrintWriter writer,
                        java.lang.String path)

Session information for the web application at the specified context path. Displays a profile of session MaxInactiveInterval timeouts listing number of sessions for each 10 minute timeout interval up to 10 hours.

Parameters:

writer - Writer to render to

path - Context path of the application to list session information for

start

protected void start(java.io.PrintWriter writer,
                     java.lang.String path)

Start the web application at the specified context path.

Parameters:

writer - Writer to render to

path - Context path of the application to be started

stop

protected void stop(java.io.PrintWriter writer,
                    java.lang.String path)

Stop the web application at the specified context path.

Parameters:

writer - Writer to render to

path - Context path of the application to be stopped