CitizenIntelligenceAgencySpringVaadinServlet.java
/*
* Copyright 2014 James Pether Sörling
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* $Id$
* $HeadURL$
*/
package com.hack23.cia.web.impl.ui.application;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.server.DefaultUIProvider;
import com.vaadin.server.ServiceException;
import com.vaadin.server.SessionInitEvent;
import com.vaadin.server.SessionInitListener;
import com.vaadin.server.UICreateEvent;
import com.vaadin.server.UIProvider;
import com.vaadin.server.VaadinServletService;
import com.vaadin.server.VaadinSession;
import com.vaadin.spring.internal.SpringViewDisplayRegistrationBean;
import com.vaadin.spring.internal.UIID;
import com.vaadin.spring.internal.UIScopeImpl;
import com.vaadin.spring.internal.VaadinSessionScope;
import com.vaadin.spring.server.SpringUIProvider;
import com.vaadin.spring.server.SpringVaadinServlet;
import com.vaadin.ui.UI;
import com.vaadin.util.CurrentInstance;
/**
* The Class CitizenIntelligenceAgencySpringVaadinServlet.
*/
@WebServlet(value = "/*", loadOnStartup = 2, asyncSupported = true)
@VaadinServletConfiguration(productionMode = true, ui = CitizenIntelligenceAgencyUI.class, widgetset = "com.hack23.cia.web.widgets.WebWidgetSet")
public final class CitizenIntelligenceAgencySpringVaadinServlet extends SpringVaadinServlet {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
@Override
protected void servletInitialized() throws ServletException {
VaadinServletService service = getService();
service.addSessionInitListener(new SessionInitListener() {
private static final long serialVersionUID = -6307820453486668084L;
@Override
public void sessionInit(SessionInitEvent sessionInitEvent) throws ServiceException {
final VaadinSession session = sessionInitEvent.getSession();
for (UIProvider provider : session.getUIProviders()) {
// use canonical names as these may have been loaded with
// different classloaders
if (DefaultUIProvider.class.getCanonicalName().equals(provider.getClass().getCanonicalName())) {
session.removeUIProvider(provider);
}
}
session.addUIProvider(new CustomSpringUIProvider(session));
}
});
service.addSessionDestroyListener(event -> {
VaadinSession session = event.getSession();
UIScopeImpl.cleanupSession(session);
VaadinSessionScope.cleanupSession(session);
});
}
/**
* The Class CustomSpringUIProvider.
*/
private static class CustomSpringUIProvider extends SpringUIProvider {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The spring view display registration bean. */
private final SpringViewDisplayRegistrationBean springViewDisplayRegistrationBean = new SpringViewDisplayRegistrationBean();
/**
* Instantiates a new custom spring UI provider.
*
* @param vaadinSession the vaadin session
*/
public CustomSpringUIProvider(VaadinSession vaadinSession) {
super(vaadinSession);
}
@Override
public UI createInstance(UICreateEvent event) {
final Class<UIID> key = UIID.class;
final UIID identifier = new UIID(event);
CurrentInstance.set(key, identifier);
try {
logger.debug("Creating a new UI bean of class [{}] with identifier [{}]",
event.getUIClass().getCanonicalName(), identifier);
UI ui = getWebApplicationContext().getBean(event.getUIClass());
getSpringViewDisplayRegistrationBean().setBeanClass(event.getUIClass());
configureNavigator(ui);
return ui;
} finally {
CurrentInstance.set(key, null);
}
}
@Override
protected Object findSpringViewDisplay(UI ui) {
return getSpringViewDisplayRegistrationBean().getSpringViewDisplay(getWebApplicationContext());
}
/**
* Gets the spring view display registration bean.
*
* @return the spring view display registration bean
*/
private SpringViewDisplayRegistrationBean getSpringViewDisplayRegistrationBean() {
return springViewDisplayRegistrationBean;
}
}
}