Examples of RequestCycle

org.apache.tapestry.engine.RequestCycle
Provides the logic for processing a single request cycle. Provides access to the {@link IEngine engine} and the {@link RequestContext}. @author Howard Lewis Ship

org.apache.wicket.RequestCycle

Represents the processing of a request. It is responsible for instructing the {@link IRequestCycleProcessor request cycle processor} to execute the various steps there are inthe handling of a request (resolving the kind of work that needs to be done, handling of events and generating a response), and it holds the intended {@link IRequestTarget request target}, which is an abstraction for e.g. the processing of a bookmarkable page.

The abstract urlFor() methods are implemented by subclasses of RequestCycle and return encoded page URLs. The URL returned depends on the kind of page being linked to. Pages broadly fall into two categories:

A page that does not yet exist in a user Session may be encoded as a URL that references the not-yet-created page by class name. A set of PageParameters can also be encoded into the URL, and these parameters will be passed to the page constructor if the page later needs to be instantiated.

Any page of this type is bookmarkable, and a hint to that effect is given to the user in the URL:

/[Application]?bookmarkablePage=[classname]&[param]=[value] [...]

Bookmarkable pages must either implement a constructor that takes a PageParameters argument or a default constructor. If a Page has both constructors the constructor with the PageParameters argument will be used. Links to bookmarkable pages are created by calling the urlFor(Class, PageParameters) method, where Class is the page class and PageParameters are the parameters to encode into the URL.

Stateful pages (that have already been requested by a user) will be present in the user's Session and can be referenced securely with a session-relative number:

/[Application]?wicket:interface=[pageMapName]:[pageId]: ...

Often, the reason to access an existing session page is due to some kind of "postback" (either a link click or a form submit) from a page (possibly accessed with the browser's back button or possibly not). A call to a registered listener is dispatched like so:

/[Application]?wicket:interface=[pageMapName]:[pageId]:[componentPath]:[version]:[interfaceName]

For example:

/[Application]?wicket:interface=:3:signInForm:submit::IFormSubmitListener

URLs for stateful pages (those that already exist in the session map) are created by calling the urlFor(Component, Class) method, where Component is the component being linked to and Class is the interface on the component to call.

For pages falling into the second category, listener interfaces cannot be invoked unless they have first been registered via the static registerSecureInterface() method. This method ensures basic security by restricting the set of interfaces that outsiders can call via GET and POST requests. Each listener interface has a single method which takes only a RequestCycle parameter. Currently, the following classes register the following kinds of listener interfaces:

Class	Interface	Purpose
Form	IFormSubmitListener	Handle form submits
Image	IResourceListener	Respond to image resource requests
Link	ILinkListener	Respond to link clicks
Page	IRedirectListener	Respond to redirects

The redirectToInterceptPage() and continueToOriginalDestination() methods can be used to temporarily redirect a user to some page. This is mainly intended for use in signing in users who have bookmarked a page inside a site that requires the user be authenticated before they can access the page. When it is discovered that the user is not signed in, the user is redirected to the sign-in page with redirectToInterceptPage(). When the user has signed in, they are sent on their way with continueToOriginalDestination(). These methods could also be useful in "interstitial" advertising or other kinds of "intercepts".

@author Jonathan Locke @author Eelco Hillenius @author Igor Vaynberg (ivaynberg)

org.apache.wicket.ng.request.cycle.RequestCycle
org.apache.wicket.request.cycle.RequestCycle
{@link RequestCycle} consists of two steps:
1. Resolve request handler
2. Execute request handler
During {@link IRequestHandler} execution the handler can schedule another {@link IRequestHandler}to run after it is done, or replace all {@link IRequestHandler}s on stack with another {@link IRequestHandler}. @see #scheduleRequestHandlerAfterCurrent(IRequestHandler) @see #replaceAllRequestHandlers(IRequestHandler) @author Matej Knopp @author igor.vaynberg

Examples of org.apache.tapestry.engine.RequestCycle

        
        decodeParameters(request.getActivationPath(), request.getPathInfo(), parameters);
        
        String serviceName = findService(parameters);
        
        IRequestCycle cycle = new RequestCycle(engine, parameters, serviceName, _environment);
        
        _requestGlobals.store(cycle);
        
        try {
            cycle.setResponseBuilder(_responseDelegateFactory.getResponseBuilder(cycle));
        } catch (IOException e) {
            throw new ApplicationRuntimeException("Error creating response builder.", e);
        }
        
        return cycle;

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Examples of org.apache.wicket.RequestCycle

   * @param url
   *            The url which describes the component path and the interface to be called.
   */
  private void dispatchEvent(final Page page, final String url)
  {
    RequestCycle rc = RequestCycle.get();
    IRequestCycleProcessor processor = rc.getProcessor();
    final RequestParameters requestParameters = processor.getRequestCodingStrategy().decode(
      new FormDispatchRequest(rc.getRequest(), url));
    IRequestTarget rt = processor.resolve(rc, requestParameters);
    if (rt instanceof IListenerInterfaceRequestTarget)
    {
      IListenerInterfaceRequestTarget interfaceTarget = ((IListenerInterfaceRequestTarget)rt);
      interfaceTarget.getRequestListenerInterface().invoke(page, interfaceTarget.getTarget());

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Examples of org.apache.wicket.ng.request.cycle.RequestCycle

  public final void onResourceRequested()
  {
    try
    {
      // Get request cycle
      final RequestCycle cycle = RequestCycle.get();


      // Fetch resource from subclass if necessary
      IResourceStream resourceStream = init();


      // Get servlet response to use when responding with resource
      final WebResponse response = (WebResponse)cycle.getResponse();


      // FIXME WICKET-385 Move HTTP caching features out of org.apache.wicket.Resource
      if (isCacheable())
      {
        response.setLastModifiedTime(resourceStream.lastModifiedTime().getMilliseconds());
      }
      else
      {
        response.setLastModifiedTime(-1);
      }
      configureResponse(response);


      cycle.scheduleRequestHandlerAfterCurrent(new ResourceStreamRequestHandler(
        resourceStream));
    }
    finally
    {
      // Really really really make sure parameters are cleared

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Examples of org.apache.wicket.request.cycle.RequestCycle

    Session session = ThreadContext.getSession();


    if (session == null)
    {
      // no session is available via ThreadContext, so lookup in session store
      RequestCycle requestCycle = RequestCycle.get();
      if (requestCycle != null)
      {
        session = Application.get().getSessionStore().lookup(requestCycle.getRequest());
        if (session != null)
        {
          ThreadContext.setSession(session);
        }
      }

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Examples of org.apache.wicket.request.cycle.RequestCycle

   */
  public final String getId()
  {
    if (id == null)
    {
      RequestCycle requestCycle = RequestCycle.get();
      if (requestCycle != null)
      {
        id = getSessionStore().getSessionId(requestCycle.getRequest(), false);
      }
      // we have one?
      if (id != null)
      {
        dirty();

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Examples of org.apache.wicket.request.cycle.RequestCycle

   */
  public final Serializable getAttribute(final String name)
  {
    if (!isTemporary())
    {
      RequestCycle cycle = RequestCycle.get();
      if (cycle != null)
      {
        return getSessionStore().getAttribute(cycle.getRequest(), name);
      }
    }
    else
    {
      if (temporarySessionAttributes != null)

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Examples of org.apache.wicket.request.cycle.RequestCycle

   */
  public final List<String> getAttributeNames()
  {
    if (!isTemporary())
    {
      RequestCycle cycle = RequestCycle.get();
      if (cycle != null)
      {
        return Collections.unmodifiableList(getSessionStore().getAttributeNames(
          cycle.getRequest()));
      }
    }
    else
    {
      if (temporarySessionAttributes != null)

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Examples of org.apache.wicket.request.cycle.RequestCycle

   */
  public final void removeAttribute(String name)
  {
    if (!isTemporary())
    {
      RequestCycle cycle = RequestCycle.get();
      if (cycle != null)
      {
        getSessionStore().removeAttribute(cycle.getRequest(), name);
      }
    }
    else
    {
      if (temporarySessionAttributes != null)

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Examples of org.apache.wicket.request.cycle.RequestCycle

   */
  public final void setAttribute(String name, Serializable value)
  {
    if (!isTemporary())
    {
      RequestCycle cycle = RequestCycle.get();
      if (cycle == null)
      {
        throw new IllegalStateException(
          "Cannot set the attribute: no RequestCycle available.  If you get this error when using WicketTester.startPage(Page), make sure to call WicketTester.createRequestCycle() beforehand.");
      }


      ISessionStore store = getSessionStore();
      Request request = cycle.getRequest();


      // extra check on session binding event
      if (value == this)
      {
        Object current = store.getAttribute(request, name);

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Examples of org.apache.wicket.request.cycle.RequestCycle

  public final void onRequest()
  {
    WebApplication app = (WebApplication)getComponent().getApplication();
    AjaxRequestTarget target = app.newAjaxRequestTarget(getComponent().getPage());


    RequestCycle requestCycle = RequestCycle.get();
    requestCycle.scheduleRequestHandlerAfterCurrent(target);


    respond(target);
  }

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