org.springframework.web.servlet

Class ViewRendererServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.springframework.web.servlet.ViewRendererServlet

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

public class ViewRendererServlet
extends HttpServlet

ViewRendererServlet is a bridge servlet, mainly for the Portlet MVC support.

For usage with Portlets, this Servlet is necessary to force the portlet container to convert the PortletRequest to a ServletRequest, which it has to do when including a resource via the PortletRequestDispatcher. This allows for reuse of the entire Servlet-based View support even in a Portlet environment.

The actual mapping of the bridge servlet is configurable in the DispatcherPortlet, via a "viewRendererUrl" property. The default is "/WEB-INF/servlet/view", which is just available for internal resource dispatching.

Since:

2.0

Author:

William G. Thompson, Jr., John A. Lewis, Juergen Hoeller

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	MODEL_ATTRIBUTE Name of request attribute that holds the model Map
static String	VIEW_ATTRIBUTE Name of request attribute that holds the View object
static String	WEB_APPLICATION_CONTEXT_ATTRIBUTE Request attribute to hold current web application context.

Constructor Summary

Constructors

Constructor and Description
ViewRendererServlet()

Method Summary

Modifier and Type	Method and Description
protected void	doGet(HttpServletRequest request, HttpServletResponse response)
protected void	doPost(HttpServletRequest request, HttpServletResponse response)
protected void	processRequest(HttpServletRequest request, HttpServletResponse response) Process this request, handling exceptions.
protected void	renderView(HttpServletRequest request, HttpServletResponse response) Retrieve the View instance and model Map to render and trigger actual rendering.

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

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

Methods inherited from class java.lang.Object

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

Field Detail

WEB_APPLICATION_CONTEXT_ATTRIBUTE

public static final String WEB_APPLICATION_CONTEXT_ATTRIBUTE

Request attribute to hold current web application context. Otherwise only the global web app context is obtainable by tags etc.

See Also:

RequestContextUtils.findWebApplicationContext(javax.servlet.http.HttpServletRequest, javax.servlet.ServletContext)

VIEW_ATTRIBUTE

public static final String VIEW_ATTRIBUTE

Name of request attribute that holds the View object

MODEL_ATTRIBUTE

public static final String MODEL_ATTRIBUTE

Name of request attribute that holds the model Map

Constructor Detail

ViewRendererServlet

public ViewRendererServlet()

Method Detail

doGet

protected final void doGet(HttpServletRequest request,
                           HttpServletResponse response)
                    throws ServletException,
                           IOException

Overrides:

doGet in class HttpServlet

Throws:

ServletException

IOException

doPost

protected final void doPost(HttpServletRequest request,
                            HttpServletResponse response)
                     throws ServletException,
                            IOException

Overrides:

doPost in class HttpServlet

Throws:

ServletException

IOException

processRequest

protected final void processRequest(HttpServletRequest request,
                                    HttpServletResponse response)
                             throws ServletException,
                                    IOException

Process this request, handling exceptions. The actually event handling is performed by the abstract renderView() template method.

Throws:

ServletException

IOException

See Also:

renderView(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

renderView

protected void renderView(HttpServletRequest request,
                          HttpServletResponse response)
                   throws Exception

Retrieve the View instance and model Map to render and trigger actual rendering.

Parameters:

request - current HTTP request

response - current HTTP response

Throws:

Exception - in case of any kind of processing failure

See Also:

View.render(java.util.Map<java.lang.String, ?>, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)