Thanks a lot everyone. Finally the BasePase way works
But the dispatcher way still doesn't work.
lyifan wrote:
>
> I am a 100% new user for tapestry. Currently I'm working on 5.0.5, but I
> got stuck from the just beginning.
>
> I want to implement a kind of user access controller. All the pages,
> excepts for the login page, can be accessed by authenticated users only.
> users who hasn't passed the authentication will be redirected to the login
> page to input their user name and password, and then, if the user name and
> password are correct, they will see the page they want
>
> I think this is a very very simple thing to do.But after a few days
> working, I am very frustrated.
>
> Firstly, I've tried the onActivate method. My code looks like below:
>
> class BasePage {
> @ApplicationState
> private UserIdentity _userIdentity;
> private boolean _userIdentityExists;
>
> Object onActivate() {
>
> if( !_userIdentityExists)
> return "Login"; //Login is my login page
>
> return null;
> }
> }
>
> And the I visited http://localhost:8080/myapp(default page is start), I
> got a blank empty page. There is nothing at all on the browser. But I can
> see the login page when I went to http://localhost:8080/myapp/login
>
> After that I found an article at
> http://wiki.apache.org/tapestry/Tapestry5HowToCreateADispatcher. According
> to this, I created my dispatcher. But I found ASO doesn't work in my
> dispatcher class.
> boolean _myIdentityExists always be false.
>
> And if I contribute it use "before:PageRender", the dispatch method would
> not be invoked then I visit the default start page. I had to use
> "before:RootPath". Following it my dispatcher class code:
>
> public class SessionController implements Dispatcher {
>
> @ApplicationState
> private MyIdentity _myIdentity;
> private boolean _myIdentityExists;
>
> public SessionController() {
> System.out.println("SessionController: SessionController
> created.");
> }
>
> public boolean dispatch(Request request, Response response) throws
> IOException {
> System.out.println("Requesting " + request.getPath());
>
> if (! _myIdentityExists ) { // _myIdentityExists always be false
> if( _myIdentity == null ) { // here MyIdentity won't be
> created
> _myIdentity = new MyIdentity(); // I have to
> create it by myself.
> System.out.println("SessionController: Identity
> does not exist.");
> response.sendRedirect("login");
> return true; // this works, I can see the
> login page correctly.
> }else
> System.out.println("SessionController: Identity
> exists.");
> }
>
> return false;
> }
> }
>
> and here is the code in AppModule:
> public void
> contributeMasterDispatcher(OrderedConfiguration<Dispatcher> configuration,
> @InjectService("SessionController") Dispatcher
> sessionController) {
> configuration.add("SessionController", sessionController,
> "before:PageRender");
> }
>
>
> before:PageRender and before:Asset do not call dispatch method,
> before:RootPath does
>
> I set the session timeout to 1 min in the web.xml.
> <session-config>
> <session-timeout>1</session-timeout>
> </session-config>
>
> After 1 min, I came to the start page.supposedly, I would be redirected to
> the login page because session is timeout. But I could still visit the
> start page, which meas _myIdentity is still in the Session after the
> timeout. Is it a bug or I shouldn't create it by myself?
>
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