When I run example "icefaces",I debug class LoggedInInterceptor.But I
found :
import javax.faces.event.PhaseId;
import org.jboss.seam.annotations.Interceptor;
import org.jboss.seam.contexts.Contexts;
import org.jboss.seam.contexts.Lifecycle;
import org.jboss.seam.interceptors.BijectionInterceptor;
import org.jboss.seam.interceptors.BusinessProcessInterceptor;
import org.jboss.seam.interceptors.ConversationInterceptor;
import org.jboss.seam.interceptors.RemoveInterceptor;
import org.jboss.seam.interceptors.ValidationInterceptor;
@Interceptor(around={BijectionInterceptor.class, ValidationInterceptor.class,
ConversationInterceptor.class, BusinessProcessInterceptor.class},
within=RemoveInterceptor.class)
public class LoggedInInterceptor
{
@AroundInvoke
public Object checkLoggedIn(InvocationContext invocation) throws Exception
{
boolean isLoggedIn = Contexts.getSessionContext().get("loggedIn")!=null;
if ( Lifecycle.getPhaseId()==PhaseId.INVOKE_APPLICATION )
{
if (isLoggedIn)
{
return invocation.proceed();
}
else
{
return "login";
}
}
else
{
if ( isLoggedIn )
{
return invocation.proceed();
}
else
{
Method method = invocation.getMethod();
if ( method.getReturnType().equals(void.class) )
{
return null;
}
else
{
return method.invoke( invocation.getTarget(), invocation.getParameters() );
}
}
}
}
}Why "return null" not "return 'login'" in red fragment.
I clicked link "http://localhost:8000/seam-registration/main.seam?cid=2" ,
it did not return to "login" page.
So I fixed "retrun null" above to "return 'login'",
but it still did not return to "login" page.
Through logging, I found if "Lifecycle.getPhaseId()!=PhaseId.INVOKE_APPLICATION",
it will never be redirect to new page.
How can I redirect to new page in Interceptor,
and who can tell me how does Interceptor work?
