org.mortbay.jetty.servlet
Class Dispatcher

java.lang.Object
  |
  +--org.mortbay.jetty.servlet.Dispatcher

All Implemented Interfaces:

RequestDispatcher

public class Dispatcher

extends java.lang.Object

implements RequestDispatcher

Servlet RequestDispatcher. If the request attribute "org.mortbay.jetty.servlet.Dispatcher.shared_session" is set, then sessions are shared in cross context dispatch. Watch out for class loading issues!

Version:

$Id: Dispatcher.java,v 1.54.2.7 2004/05/06 10:00:05 gregwilkins Exp $

Author:

Greg Wilkins (gregw)

Field Summary

static java.lang.String	__CONTEXT_PATH
static StringMap	__managedAttributes
static java.lang.String	__PATH_INFO
static java.lang.String	__QUERY_STRING
static java.lang.String	__REQUEST_URI
static java.lang.String	__SERVLET_PATH

Method Summary

void	forward(ServletRequest servletRequest, ServletResponse servletResponse) Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server.
void	include(ServletRequest servletRequest, ServletResponse servletResponse) Includes the content of a resource (servlet, JSP page, HTML file) in the response.
boolean	isNamed()
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

__REQUEST_URI

public static final java.lang.String __REQUEST_URI

See Also:

Constant Field Values

__CONTEXT_PATH

public static final java.lang.String __CONTEXT_PATH

See Also:

Constant Field Values

__SERVLET_PATH

public static final java.lang.String __SERVLET_PATH

See Also:

Constant Field Values

__PATH_INFO

public static final java.lang.String __PATH_INFO

See Also:

Constant Field Values

__QUERY_STRING

public static final java.lang.String __QUERY_STRING

See Also:

Constant Field Values

__managedAttributes

public static final StringMap __managedAttributes

Method Detail

isNamed

public boolean isNamed()

include

public void include(ServletRequest servletRequest,
                    ServletResponse servletResponse)
             throws ServletException,
                    java.io.IOException

Description copied from interface: RequestDispatcher

Includes the content of a resource (servlet, JSP page, HTML file) in the response. In essence, this method enables programmatic server-side includes.

The ServletResponse object has its path elements and parameters remain unchanged from the caller's. The included servlet cannot change the response status code or set headers; any attempt to make a change is ignored.

The request and response parameters must be either the same objects as were passed to the calling servlet's service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them.

Specified by:

include in interface RequestDispatcher

Parameters:

servletRequest - a ServletRequest object that contains the client's request

servletResponse - a ServletResponse object that contains the servlet's response

Throws:

java.io.IOException - if the included resource throws this exception

ServletException - if the included resource throws this exception

forward

public void forward(ServletRequest servletRequest,
                    ServletResponse servletResponse)
             throws ServletException,
                    java.io.IOException

Description copied from interface: RequestDispatcher

Forwards a request from a servlet to another resource (servlet, JSP file, or HTML file) on the server. This method allows one servlet to do preliminary processing of a request and another resource to generate the response.

For a RequestDispatcher obtained via getRequestDispatcher(), the ServletRequest object has its path elements and parameters adjusted to match the path of the target resource.

forward should be called before the response has been committed to the client (before response body output has been flushed). If the response already has been committed, this method throws an IllegalStateException. Uncommitted output in the response buffer is automatically cleared before the forward.

The request and response parameters must be either the same objects as were passed to the calling servlet's service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them.

Specified by:

forward in interface RequestDispatcher

Parameters:

servletRequest - a ServletRequest object that represents the request the client makes of the servlet

servletResponse - a ServletResponse object that represents the response the servlet returns to the client

Throws:

java.io.IOException - if the target resource throws this exception

ServletException - if the target resource throws this exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object