<%@page import="com.vaadin.ui.UI"%> <%@page import="com.vaadin.server.VaadinSession"%> <% HttpSession httpSession = request.getSession(false); for (VaadinSession vs : VaadinSession.getAllSessions(httpSession)) { try { vs.lock(); for (UI ui : vs.getUIs()) { out.append(""); out.append(""); out.append(""); out.append(""); out.append(""); out.append(""); out.append(""); } } finally { vs.unlock(); } } %>

Available UIs:
Service Name	CSRF token	UI id	UI type	Main content
" + vs.getService().getServiceName() + "	" + vs.getCsrfToken() + "	" + ui.getUIId() + "	" + ui.getClass().getName() + "	" + ui.getContent().getClass().getName() + "