/**
* Gets the currently used Vaadin portlet. The current portlet is automatically defined when
* initializing the portlet and when processing requests to the server and in threads started at a
* point when the current portlet is defined (see {@link InheritableThreadLocal}). In other cases,
* (e.g. from background threads started in some other way), the current portlet is not
* automatically defined.
*
* <p>The current portlet is derived from the current service using {@link
* VaadinService#getCurrent()}
*
* @return the current vaadin portlet instance if available, otherwise <code>null</code>
* @since 7.0
*/
public static VaadinPortlet getCurrent() {
VaadinService vaadinService = CurrentInstance.get(VaadinService.class);
if (vaadinService instanceof VaadinPortletService) {
VaadinPortletService vps = (VaadinPortletService) vaadinService;
return vps.getPortlet();
} else {
return null;
}
}
/**
* Gets the currently used UI. The current UI is automatically defined when processing requests to
* the server. In other cases, (e.g. from background threads), the current UI is not automatically
* defined.
*
* @return the current UI instance if available, otherwise <code>null</code>
* @see #setCurrent(UI)
*/
public static UI getCurrent() {
return CurrentInstance.get(UI.class);
}
