I too have been trying to implement what is on the wiki.
This is really doing my head in (not helped by the fact the wiki
solution http://wiki.apache.org/tapestry/Tapestry5HowToControlAccess
does not have all the "bits" of code necessary for a newbie like
myself to get it working. For instance, it's missing the package
imports and is also missing a necessary try-catch block at the end of
checkAccess()).
I've had no success after a day or more working on it - even with the
updated code recently provided. It just does not work and seems either
to be a mistake on my part in how Annotations work (they are new to
me, I admit, having not used them before), or a serious problem with
the way the code works (the ClassLoaders? It seems the standard
classloader is loading Private while the tapestry pages are via its
own classloader - I don't know how getAnnotation() works, so I'm
wildly guessing and probably wrong)
Below is the code I have. I'd appreciate a pointer on what I've done wrong.
The output is as follows:
[DEBUG] AppModule.TimingFilter Invoking method
uk.bl.dlportal.services.AppModule.buildTimingFilter(Logger) (at
AppModule.java:97).
1
PAGE CLASS = class uk.bl.dlportal.pages.Administration
PAGE ANNO = null
PAGE ANNOS = @uk.bl.dlportal.pages.util.Private()
[INFO] AppModule.TimingFilter Request time: 4784 ms
[INFO] AppModule.TimingFilter Request time: 0 ms
----------------- AccessController.java --
package uk.bl.dlportal.pages.util;
import java.io.IOException;
import org.apache.tapestry5.runtime.Component;
import org.apache.tapestry5.services.ApplicationStateManager;
import org.apache.tapestry5.services.ComponentClassResolver;
import org.apache.tapestry5.services.ComponentSource;
import org.apache.tapestry5.services.Dispatcher;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.Response;
import uk.bl.dlportal.entities.User;
public class AccessController implements Dispatcher
{
private final static String LOGIN_PAGE = "/index";
private ApplicationStateManager asm;
private final ComponentClassResolver resolver;
private final ComponentSource componentSource;
/**
* Receive all the services needed as constructor arguments. When we
bind
* this service, T5 IoC will provide all the services !
*/
public AccessController(ApplicationStateManager asm,
ComponentClassResolver resolver, ComponentSource
componentSource)
{
this.asm = asm;
this.resolver = resolver;
this.componentSource = componentSource;
}
public boolean dispatch(Request request, Response response)
throws IOException
{
System.out.println("1");
/*
* We need to get the Tapestry page requested by the user. So
we parse
* the path extracted from the request
*/
String path = request.getPath();
if (path.equals(""))
return false;
int nextslashx = path.length();
String pageName;
while (true)
{
pageName = path.substring(1, nextslashx);
if (!pageName.endsWith("/") &&
resolver.isPageName(pageName))
break;
nextslashx = path.lastIndexOf('/', nextslashx - 1);
if (nextslashx <= 1)
return false;
}
return checkAccess(pageName, request, response);
}
/**
* Check the rights of the user for the page requested
*/
public boolean checkAccess(String pageName, Request request,
Response response)
{
boolean canAccess = true;
/* Is the requested page private ? */
Component page = componentSource.getPage(pageName);
System.out.println("PAGE CLASS = "+page.getClass());
System.out.println("PAGE ANNO =
"+page.getClass().getAnnotation(Private.class));
System.out.println("PAGE ANNOS =
"+page.getClass().getAnnotations()[0]);
boolean privatePage =
page.getClass().getAnnotation(Private.class) != null;
if (privatePage)
{
canAccess = false;
/* Is the user already authenticated ? */
if (asm.exists(User.class))
{
User userSession = asm.get(User.class);
canAccess = userSession != null;
}
/*
if (asm.exists(UserSessionImpl.class))
{
UserSessionImpl userSession =
asm.get(UserSessionImpl.class);
canAccess = userSession.isUserLoggedIn();
}
*/
}
if (!canAccess)
{
try
{
response.sendRedirect(request.getContextPath()
+ LOGIN_PAGE);
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return true; // Make sure to leave the chain
}
return false;
}
}
-------------------- AppModule.java --
...
public static void bind(ServiceBinder binder)
{
// binder.bind(MyServiceInterface.class, MyServiceImpl.class);
// Make bind() calls on the binder object to define most IoC
services.
// Use service builder methods (example below) when the
implementation
// is provided inline, or requires more initialization than
simply
// invoking the constructor.
binder.bind(AccessController.class).withId("AccessController");
}
public void contributeMasterDispatcher(
OrderedConfiguration<Dispatcher> configuration,
@InjectService("AccessController") Dispatcher
accessController)
{
configuration.add("AccessController", accessController,
"before:PageRender");
}
...
---------------- Private.java --
package uk.bl.dlportal.pages.util;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Private
{
}
------------------ Administration.java -- (the page I'm testing this on)
package uk.bl.dlportal.pages;
import org.apache.tapestry5.annotations.ApplicationState;
import uk.bl.dlportal.entities.User;
import uk.bl.dlportal.pages.util.Private;
/**
* Admin page of application dlportal.
*/
@Private
public class Administration
{
....
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