Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.cerebro.provevaadin; import com.vaadin.navigator.Navigator; import com.vaadin.navigator.View; import com.vaadin.navigator.ViewChangeListener; import com.vaadin.ui.Button; import com.vaadin.ui.Component; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.UI; import com.vaadin.ui.VerticalLayout; import org.apache.shiro.SecurityUtils; import org.apache.shiro.authz.annotation.RequiresRoles; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * * @author matteo */ class Secure extends VerticalLayout { public Secure() { HorizontalLayout top = new HorizontalLayout(); this.addComponent(top); top.addComponent(new Label("Area sicura")); VerticalLayout content = new VerticalLayout(); this.addComponent(content); Navigator nav = new Navigator(UI.getCurrent(), content); nav.setErrorView(new ErrorView()); nav.addView("", new HomeView()); nav.navigateTo(""); Button logout = new Button("Logout"); logout.addClickListener((Button.ClickEvent event) -> { System.out.println("Esco dalla sessione"); SecurityUtils.getSubject().logout(); UI.getCurrent().getSession().close(); UI.getCurrent().getPage().setLocation(""); }); top.addComponent(logout); } private static class ErrorView extends VerticalLayout implements View { public ErrorView() { this.addComponent( new Label("La pagina che stai cercando non esiste oppure non hai i permessi per accederci")); } @Override public void enter(ViewChangeListener.ViewChangeEvent event) { System.out.println("View di errore"); } } private static class HomeView extends VerticalLayout implements View { Logger log = LoggerFactory.getLogger(MyUI.class); public HomeView() { this.addComponent(new Label("Homepage")); this.addComponent(addLabelAdmin()); } @Override public void enter(ViewChangeListener.ViewChangeEvent event) { log.info("View Home page"); } @RequiresRoles("admin") private Label addLabelAdmin() { Label l = new Label("Etichetta"); if (SecurityUtils.getSubject().hasRole("admin")) { l.setValue("Etichetta come amministratore"); } return l; } } }