i think this is they way you need:
@InjectPage(value = "Login")
private ILoginPage _loginPage;
/**
* check for user is authentificated if requested page implements
IRestrictedPage.
*
* @return
*/
@OnEvent(value = "activate")
Object checkPageAccessPermission()
{
//
// Page nur fuer den angemeldeten User erreichbar ?
//
if (this instanceof IRestrictedPage)
{
if (!isLoggedIn())
return _loginPage;
}
return null;
}
2008/2/11, Travis McLeskey <[EMAIL PROTECTED]>:
>
> Unfortunately, for me, returning false produced this nasty-looking
> stack trace:
>
> [ERROR]
> org.apache.tapestry.internal.services.DefaultRequestExceptionHandler
> Processing of request failed with uncaught exception: Page Start did
> not generate any markup when rendered. This could be because its
> template file could not be located, or because a render phase method
> in the page prevented rendering.
> java.lang.RuntimeException: Page Start did not generate any markup
> when rendered. This could be because its template file could not be
> located, or because a render phase method in the page prevented
> rendering.
> at
> org
> .apache
> .tapestry
> .internal
> .services
> .PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:58)
> at
> $
> PageMarkupRenderer_11806dbfeb2
> .renderPageMarkup($PageMarkupRenderer_11806dbfeb2.java)
> at
> org
> .apache
> .tapestry
> .internal
> .services
> .PageResponseRendererImpl
> .renderPageResponse(PageResponseRendererImpl.java:56)
> .
> .
> .
>
> I don't understand, but I think I'll just return void from the method
> instead.
>
> Travis
>
>
> On Feb 10, 2008, at 9:54 PM, Dapeng wrote:
>
> > besides the similarity
> >
> > i guess ur beginRender should return false for redirect
> >
> > refering to the state diagram
> >
> > http://tapestry.apache.org/tapestry5/tapestry-core/guide/
> > rendering.html
> >
> >
> > Travis McLeskey wrote:
> >> Ah, thanks, that works for me. Here's what I did:
> >>
> >> @Inject
> >> private Response response;
> >>
> >> @Inject
> >> private LinkFactory linkFactory;
> >>
> >> public Object beginRender() throws IOException {
> >> if( isLoginNeeded() )
> >>
> >> response.sendRedirect( linkFactory.createPageLink("Login", true) );
> >> return true;
> >> }
> >>
> >> I wish there were a cleaner way, but that'll do.
> >>
> >> Thanks,
> >> Travis
> >>
> >>
> >>
> >> On Feb 10, 2008, at 9:06 PM, Dapeng wrote:
> >>
> >>> what i am doing is
> >>>
> >>> @Inject
> >>> private Response response;
> >>>
> >>> boolean beginRender(){
> >>>
> >>> if( isRedirectNeeded() ) {
> >>> try { response.sendRedirect("") } catch (Exception e) {}
> >>> return false;
> >>> }
> >>>
> >>> }
> >>>
> >>>
> >>>
> >>> Travis McLeskey wrote:
> >>>> In a page, you can listen for the "activate" event and, for
> >>>> example, if the user doesn't have permission to view that page,
> >>>> you can return a value (Page, Class, String, etc.) that triggers
> >>>> a redirect to another page.
> >>>>
> >>>> Is it possible to do the same when a component is loading/
> >>>> rendering? Components don't receive the "activate" event, and I
> >>>> haven't had any luck returning a page object from setupRender()
> >>>> and beginRender().
> >>>>
> >>>> Thanks,
> >>>> Travis
> >>>>
> >>>>
> >>>> ---------------------------------------------------------------------
> >>>> To unsubscribe, e-mail: [EMAIL PROTECTED]
> >>>> For additional commands, e-mail: [EMAIL PROTECTED]
> >>>>
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: [EMAIL PROTECTED]
> >>> For additional commands, e-mail: [EMAIL PROTECTED]
> >>>
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: [EMAIL PROTECTED]
> >> For additional commands, e-mail: [EMAIL PROTECTED]
> >>
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
--
with regards
Sven Homburg
