Forward context question

[david joffrin <da...@hotmail.com>]

Hi,

I am pasting the sample from the javadoc regarding redirect helper 
functionality in Tapestry.
public class Home extends BasePage {
      public void validate(IRequestCycle cycle) {
          Visit visit = (Visit) getVisit();
          if (!visit.isAuthenticated()) {
              Login login = (Login) cycle.getPage("Login");
              login.setCallback(new PageCallback(this));
              throw new PageRedirectException(login);
          }
      }
  }

  public Login extends BasePage {
      private ICallback _callback;
      public void setCallback(ICallback _callback) {
          _callback = callback;
      }

      public void formSubmit(IRequestCycle cycle) {
          // Authentication code
          ..

          Visit visit = (Visit) getVisit();
          visit.setAuthenticated(true);
          if (_callback != null) {
              _callback.performCallback(cycle);
          }
      }
  }

Imagine now that I go from A to B with some parameters. As I am not logged 
in, I go throug hthe login page which then redirects to B afterwards.
How can I ensure that the parameters of the request A->B are kept?
Should I use setServicesParameters?

Thanks.
DvJ



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Re: Forward context question

[Kent Tong <ke...@cpttm.org.mo>]

david joffrin <david_joffrin <at> hotmail.com> writes:

> Imagine now that I go from A to B with some parameters. As I am not logged 
> in, I go throug hthe login page which then redirects to B afterwards.
> How can I ensure that the parameters of the request A->B are kept?
> Should I use setServicesParameters?

Use an ExternalCallback instead of a PageCallback. Then page B
must implmenet IExternalPage and implement
activateExternalPage(Object[] parameters, IRequestCycle cycle).



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