org.apache.wicket.core.request.handler.RenderPageRequestHandler Java Examples

@Override
public WebRequest newWebRequest(HttpServletRequest servletRequest, String filterPath) {
	return new ServletWebRequest(servletRequest, filterPath) {

		@Override
		public boolean shouldPreserveClientUrl() {
			if (RequestCycle.get().getActiveRequestHandler() instanceof RenderPageRequestHandler) {
				RenderPageRequestHandler requestHandler = 
						(RenderPageRequestHandler) RequestCycle.get().getActiveRequestHandler();
				
				/*
				 *  Add this to make sure that the page url does not change upon errors, so that 
				 *  user can know which page is actually causing the error. This behavior is common
				 *  for main stream applications.   
				 */
				if (requestHandler.getPage() instanceof GeneralErrorPage) 
					return true;
			}
			return super.shouldPreserveClientUrl();
		}
		
	};
}
 

@Override
public IRequestHandler onException(RequestCycle cycle, Exception e) {
	if (e instanceof PageExpiredException) {
		LOG.error("Page expired", e); // !?
		return null; // see
						// getApplicationSettings().setPageExpiredErrorPage
	}

	if (e instanceof MaintenanceException) {
		return new RenderPageRequestHandler(new PageProvider(MaintenancePage.class));
	}

	if (e instanceof StalePageException) {
		return null;
	}

	String errorCode = String.valueOf(System.currentTimeMillis());
	LOG.error("Error with code " + errorCode, e);

	PageParameters parameters = new PageParameters();
	parameters.add("errorCode", errorCode);
	parameters.add("errorMessage", UrlEncoder.QUERY_INSTANCE.encode(e.getMessage(), HTTP.ISO_8859_1));
	return new RenderPageRequestHandler(new PageProvider(ErrorPage.class, parameters));
}
 

/**
 * Redirects to the specified {@code interceptPage}.
 * 
 * @param interceptPage
 */
public RestartResponseAtInterceptPageException(Page interceptPage)
{
	super(new RenderPageRequestHandler(new PageProvider(interceptPage),
		RedirectPolicy.AUTO_REDIRECT));
	InterceptData.set();
}
 

/**
 * Redirects to the specified intercept page, this will result in a bookmarkable redirect.
 * 
 * @param interceptPageClass
 * @param parameters
 */
public RestartResponseAtInterceptPageException(Class<? extends Page> interceptPageClass,
	PageParameters parameters)
{
	super(new RenderPageRequestHandler(new PageProvider(interceptPageClass, parameters),
		RedirectPolicy.ALWAYS_REDIRECT));
	InterceptData.set();
}
 

@Override
public IRequestHandler onException(RequestCycle cycle, Exception ex) {
	try {
		Throwable th = null;
		if((th=Exceptions.findCause(ex, OSecurityException.class))!=null
				|| (th=Exceptions.findCause(ex, OValidationException.class))!=null
				|| (th=Exceptions.findCause(ex, OSchemaException.class))!=null
				|| (th=Exceptions.findCause(ex, IllegalStateException.class))!=null && Exceptions.findCause(ex, WicketRuntimeException.class)==null)
		{
			Page page = extractCurrentPage(false);
			if(page==null) {
				if(th instanceof OSecurityException) 
					OrientDbWebApplication.get().restartResponseAtSignInPage(); //Will throw exception
				return null;
			}
			OrientDbWebSession.get().error(th.getMessage());
			return new RenderPageRequestHandler(new PageProvider(page),
			RenderPageRequestHandler.RedirectPolicy.ALWAYS_REDIRECT);
		}
		else if((th=Exceptions.findCause(ex, UnauthorizedActionException.class))!=null)
		{
			final UnauthorizedActionException unauthorizedActionException = (UnauthorizedActionException)th;
			return new UnauthorizedInstantiationHandler(unauthorizedActionException.getComponent());
		}
		else
		{
			return null;
		}
	} catch (ReplaceHandlerException e) {
		return e.getReplacementRequestHandler();
	}
}
 

@Override
public void init() {
	super.init();

	// page mounting for bookmarkable URLs
	mountPage("/grades", GradebookPage.class);
	mountPage("/settings", SettingsPage.class);
	mountPage("/importexport", ImportExportPage.class);
	mountPage("/permissions", PermissionsPage.class);
	mountPage("/gradebook", StudentPage.class);
	mountPage("/accessdenied", AccessDeniedPage.class);
	mountPage("/error", ErrorPage.class);

	// remove the version number from the URL so that browser refreshes re-render the page
	getRequestCycleSettings().setRenderStrategy(RenderStrategy.ONE_PASS_RENDER);

	// Configure for Spring injection
	getComponentInstantiationListeners().add(new SpringComponentInjector(this));

	// Add ResourceLoader that integrates with Sakai's Resource Loader
	getResourceSettings().getStringResourceLoaders().add(0, new GradebookNgStringResourceLoader());

	// Don't throw an exception if we are missing a property, just fallback
	getResourceSettings().setThrowExceptionOnMissingResource(false);

	// Remove the wicket specific tags from the generated markup
	getMarkupSettings().setStripWicketTags(true);

	// Don't add any extra tags around a disabled link (default is <em></em>)
	getMarkupSettings().setDefaultBeforeDisabledLink(null);
	getMarkupSettings().setDefaultAfterDisabledLink(null);

	// On Wicket session timeout, redirect to main page
	// getApplicationSettings().setPageExpiredErrorPage(getHomePage());

	// Intercept any unexpected error stacktrace and take to our page
	getRequestCycleListeners().add(new AbstractRequestCycleListener() {
		@Override
		public IRequestHandler onException(final RequestCycle cycle, final Exception e) {
			return new RenderPageRequestHandler(new PageProvider(new ErrorPage(e)));
		}
	});

	// Disable Wicket's loading of jQuery - we load Sakai's preferred version in BasePage.java
	getJavaScriptLibrarySettings().setJQueryReference(new PackageResourceReference(GradebookNgApplication.class, "empty.js"));

	// cleanup the HTML
	getMarkupSettings().setStripWicketTags(true);
	getMarkupSettings().setStripComments(true);
	getMarkupSettings().setCompressWhitespace(true);
}
 

@Override
public IRequestHandler onException(final RequestCycle cycle, final Exception e) {
    LOG.error("Exception found", e);

    PageParameters errorParameters = new PageParameters();

    IRequestablePage errorPage;
    if (instanceOf(e, UnauthorizedInstantiationException.class) != null) {
        errorParameters.add("errorMessage", BaseSession.Error.AUTHORIZATION.fallback());
        errorPage = getErrorPage(errorParameters);
    } else if (instanceOf(e, AccessControlException.class) != null) {
        if (StringUtils.containsIgnoreCase(instanceOf(e, AccessControlException.class).getMessage(), "expired")) {
            errorParameters.add("errorMessage", BaseSession.Error.SESSION_EXPIRED.fallback());
        } else {
            errorParameters.add("errorMessage", BaseSession.Error.AUTHORIZATION.fallback());
        }
        errorPage = getErrorPage(errorParameters);
    } else if (instanceOf(e, PageExpiredException.class) != null || !isSignedIn()) {
        errorParameters.add("errorMessage", BaseSession.Error.SESSION_EXPIRED.fallback());
        errorPage = getErrorPage(errorParameters);
    } else if (instanceOf(e, BadRequestException.class) != null
            || instanceOf(e, WebServiceException.class) != null
            || instanceOf(e, SyncopeClientException.class) != null) {

        errorParameters.add("errorMessage", BaseSession.Error.REST.fallback());
        errorPage = getErrorPage(errorParameters);
    } else {
        Throwable cause = instanceOf(e, ForbiddenException.class);
        if (cause == null) {
            // redirect to default Wicket error page
            errorPage = new ExceptionErrorPage(e, null);
        } else {
            errorParameters.add("errorMessage", cause.getMessage());
            errorPage = getErrorPage(errorParameters);
        }
    }

    if (errorPage instanceof BaseLogin) {
        try {
            invalidateSession();
        } catch (Throwable t) {
            // ignore
            LOG.debug("Unexpected error while forcing logout after error", t);
        }
    }

    return new RenderPageRequestHandler(new PageProvider(errorPage));
}
 

@Override
public void init() {
	super.init();

	// page mounting for bookmarkable URLs
	mountPage("/grades", GradebookPage.class);
	mountPage("/settings", SettingsPage.class);
	mountPage("/importexport", ImportExportPage.class);
	mountPage("/permissions", PermissionsPage.class);
	mountPage("/gradebook", StudentPage.class);
	mountPage("/accessdenied", AccessDeniedPage.class);
	mountPage("/error", ErrorPage.class);

	// remove the version number from the URL so that browser refreshes re-render the page
	getRequestCycleSettings().setRenderStrategy(RenderStrategy.ONE_PASS_RENDER);

	// Configure for Spring injection
	getComponentInstantiationListeners().add(new SpringComponentInjector(this));

	// Add ResourceLoader that integrates with Sakai's Resource Loader
	getResourceSettings().getStringResourceLoaders().add(0, new GradebookNgStringResourceLoader());

	// Don't throw an exception if we are missing a property, just fallback
	getResourceSettings().setThrowExceptionOnMissingResource(false);

	// Remove the wicket specific tags from the generated markup
	getMarkupSettings().setStripWicketTags(true);

	// Don't add any extra tags around a disabled link (default is <em></em>)
	getMarkupSettings().setDefaultBeforeDisabledLink(null);
	getMarkupSettings().setDefaultAfterDisabledLink(null);

	// On Wicket session timeout, redirect to main page
	// getApplicationSettings().setPageExpiredErrorPage(getHomePage());

	// Intercept any unexpected error stacktrace and take to our page
	getRequestCycleListeners().add(new AbstractRequestCycleListener() {
		@Override
		public IRequestHandler onException(final RequestCycle cycle, final Exception e) {
			return new RenderPageRequestHandler(new PageProvider(new ErrorPage(e)));
		}
	});

	// Disable Wicket's loading of jQuery - we load Sakai's preferred version in BasePage.java
	getJavaScriptLibrarySettings().setJQueryReference(new PackageResourceReference(GradebookNgApplication.class, "empty.js"));

	// cleanup the HTML
	getMarkupSettings().setStripWicketTags(true);
	getMarkupSettings().setStripComments(true);
	getMarkupSettings().setCompressWhitespace(true);
}
 

@Override
protected IRequestHandler processHybrid(PageInfo pageInfo, Class< ? extends IRequestablePage> pageClass, PageParameters pageParameters,
    Integer renderCount)
{
  IRequestHandler handler = null;
  try {
    handler = super.processHybrid(pageInfo, pageClass, pageParameters, renderCount);
  } catch (PageExpiredException e) {
    // in case of pageExpiredException at this point, we just redirect to previous bookmarkable resource
    return processBookmarkable(pageClass, pageParameters);
  }
  if (handler != null && handler instanceof RenderPageRequestHandler) {
    // in the current implementation (wicket 1.5.6) super.processHybrid
    // returns a RenderPageRequestHandler
    RenderPageRequestHandler renderPageHandler = (RenderPageRequestHandler) handler;
    if (renderPageHandler.getPageProvider() instanceof PageProvider) {
      PageProvider provider = (PageProvider) renderPageHandler.getPageProvider();
      // This check is necessary to prevent a RestartResponseAtInterceptPageException at the wrong time in request cycle
      if (provider.hasPageInstance()) {
        // get page classes
        Class< ? extends IRequestablePage> oldPageClass = renderPageHandler.getPageClass();
        Class< ? extends IRequestablePage> newPageClass = renderPageHandler.getPageProvider().getPageClass();

        // get page parameters
        PageParameters newPageParameters = renderPageHandler.getPageParameters();
        PageParameters oldPageParameters = renderPageHandler.getPageProvider().getPageInstance().getPageParameters();

        if (oldPageClass != null && oldPageClass.equals(newPageClass) == false) {
          return processBookmarkable(newPageClass, newPageParameters);
        }

        // if we recognize a change between the page parameter of the loaded
        // page and the page parameter of the current request, we redirect
        // to a fresh bookmarkable instance of that page.
        if (!PageParameters.equals(oldPageParameters, newPageParameters)) {
          return processBookmarkable(newPageClass, newPageParameters);
        }
      }
    }
  }
  return handler;
}