Package org.apache.struts.tiles2

Class TilesRequestProcessor

java.lang.Object

org.apache.struts.action.RequestProcessor

org.apache.struts.tiles2.TilesRequestProcessor

All Implemented Interfaces:

Serializable

public class TilesRequestProcessor
extends RequestProcessor

RequestProcessor contains the processing logic that the Struts controller servlet performs as it receives each servlet request from the container.

This processor subclasses the Struts RequestProcessor in order to intercept calls to forward or include. When such calls are done, the Tiles processor checks if the specified URI is a definition name. If true, the definition is retrieved and included. If false, the original URI is included or a forward is performed.

Actually, catching is done by overloading the following methods:

• processForwardConfig(HttpServletRequest,HttpServletResponse,ForwardConfig)
• internalModuleRelativeForward(String, HttpServletRequest, HttpServletResponse)
• internalModuleRelativeInclude(String, HttpServletRequest, HttpServletResponse)

Since:

Struts 1.1

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected ServletContext	servletContext	The used servlet context.

Fields inherited from class org.apache.struts.action.RequestProcessor

actions, INCLUDE_PATH_INFO, INCLUDE_SERVLET_PATH, moduleConfig, servlet

Constructor Summary

Constructors

Constructor	Description
TilesRequestProcessor()

Method Summary

Modifier and Type	Method	Description
protected void	doForward(String uri, HttpServletRequest request, HttpServletResponse response)	Do a forward using request dispatcher.
void	init(ActionServlet servlet, ModuleConfig moduleConfig)	Initialize this request processor instance.
protected void	internalModuleRelativeForward(String uri, HttpServletRequest request, HttpServletResponse response)	Catch the call to a module relative forward.
protected void	internalModuleRelativeInclude(String uri, HttpServletRequest request, HttpServletResponse response)	Do a module relative include to specified uri using request dispatcher.
protected void	processForwardConfig(HttpServletRequest request, HttpServletResponse response, ForwardConfig forward)	Overloaded method from Struts' RequestProcessor.
protected boolean	processTilesDefinition(String definitionName, HttpServletRequest req, HttpServletResponse res)	Process a Tile definition name.

Methods inherited from class org.apache.struts.action.RequestProcessor

destroy, doInclude, getInternal, getServletContext, process, processActionCreate, processActionForm, processActionPerform, processCachedMessages, processContent, processException, processForward, processInclude, processLocale, processMapping, processMultipart, processNoCache, processPath, processPopulate, processPreprocess, processRoles, processValidate

Methods inherited from class java.lang.Object

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

Field Details

servletContext

protected ServletContext servletContext

The used servlet context.

Constructor Details

TilesRequestProcessor

public TilesRequestProcessor()

Method Details

init

public void init(ActionServlet servlet,
 ModuleConfig moduleConfig)
          throws ServletException

Initialize this request processor instance.

Overrides:

init in class RequestProcessor

Parameters:

servlet - The ActionServlet we are associated with.

moduleConfig - The ModuleConfig we are associated with.

Throws:

ServletException - If an error occurs during initialization.

processTilesDefinition

protected boolean processTilesDefinition(String definitionName,
 HttpServletRequest req,
 HttpServletResponse res)
                                  throws IOException,
ServletException

Process a Tile definition name. This method tries to process the parameter definitionName as a definition name. It returns true if a definition has been processed, or false otherwise.

Parameters:

definitionName - Definition name to insert.

req - Current page request.

res - Current page response.

Returns:

true if the method has processed uri as a definition name, false otherwise.

Throws:

IOException - If something goes wrong during writing the definition.

ServletException - If something goes wrong during the evaluation of the definition

doForward

protected void doForward(String uri,
 HttpServletRequest request,
 HttpServletResponse response)
                  throws IOException,
ServletException

Do a forward using request dispatcher. Uri is a valid uri. If response has already been commited, do an include instead.

Overrides:

doForward in class RequestProcessor

Parameters:

uri - Uri or Definition name to forward.

request - Current page request.

response - Current page response.

Throws:

IOException - If something goes wrong during writing the definition.

ServletException - If something goes wrong during the evaluation of the definition

processForwardConfig

protected void processForwardConfig(HttpServletRequest request,
 HttpServletResponse response,
 ForwardConfig forward)
                             throws IOException,
ServletException

Overloaded method from Struts' RequestProcessor. Forward or redirect to the specified destination by the specified mechanism. This method catches the Struts' actionForward call. It checks if the actionForward is done on a Tiles definition name. If true, process the definition and insert it. If false, call the original parent's method.

Overrides:

processForwardConfig in class RequestProcessor

Parameters:

request - The servlet request we are processing.

response - The servlet response we are creating.

forward - The ActionForward controlling where we go next.

Throws:

IOException - if an input/output error occurs.

ServletException - if a servlet exception occurs.

internalModuleRelativeForward

protected void internalModuleRelativeForward(String uri,
 HttpServletRequest request,
 HttpServletResponse response)
                                      throws IOException,
ServletException

Catch the call to a module relative forward. If the specified uri is a tiles definition name, insert it. Otherwise, parent processing is called. Do a module relative forward to specified uri using request dispatcher. Uri is relative to the current module. The real uri is computed by prefixing the module name. This method is used internally and is not part of the public API. It is advised to not use it in subclasses.

Overrides:

internalModuleRelativeForward in class RequestProcessor

Parameters:

uri - Module-relative URI to forward to.

request - Current page request.

response - Current page response.

Throws:

IOException - If something goes wrong during writing the definition.

ServletException - If something goes wrong during the evaluation of the definition

Since:

Struts 1.1

internalModuleRelativeInclude

protected void internalModuleRelativeInclude(String uri,
 HttpServletRequest request,
 HttpServletResponse response)
                                      throws IOException,
ServletException

Do a module relative include to specified uri using request dispatcher. Uri is relative to the current module. The real uri is computed by prefixing the module name. This method is used internally and is not part of the public API. It is advised to not use it in subclasses.

Overrides:

internalModuleRelativeInclude in class RequestProcessor

Parameters:

uri - Module-relative URI to forward to.

request - Current page request.

response - Current page response.

Throws:

IOException - If something goes wrong during writing the definition.

ServletException - If something goes wrong during the evaluation of the definition

Since:

Struts 1.1