fr.univlorraine.mondossierweb.utils.MdwSpringVaadinServlet.java Source code

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Here is the source code for fr.univlorraine.mondossierweb.utils.MdwSpringVaadinServlet.java

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/**
 *
 *  ESUP-Portail MONDOSSIERWEB - Copyright (c) 2016 ESUP-Portail consortium
 *
 *
 *  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.
 *
 */
package fr.univlorraine.mondossierweb.utils;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.vaadin.server.DefaultUIProvider;
import com.vaadin.server.ServiceException;
import com.vaadin.server.SessionInitEvent;
import com.vaadin.server.SessionInitListener;
import com.vaadin.server.UIProvider;
import com.vaadin.server.VaadinSession;
import com.vaadin.spring.server.SpringUIProvider;
import com.vaadin.spring.server.SpringVaadinServlet;

import fr.univlorraine.mondossierweb.MdwUIProvider;

@SuppressWarnings("serial")
public class MdwSpringVaadinServlet extends SpringVaadinServlet {

    @Override
    protected void servletInitialized() throws ServletException {
        getService().addSessionInitListener(new SessionInitListener() {

            private static final long serialVersionUID = -6307820453486668084L;

            @Override
            public void sessionInit(SessionInitEvent sessionInitEvent) throws ServiceException {
                WebApplicationContext webApplicationContext = WebApplicationContextUtils
                        .getWebApplicationContext(getServletContext());

                // remove DefaultUIProvider instances to avoid mapping
                // extraneous UIs if e.g. a servlet is declared as a nested
                // class in a UI class
                VaadinSession session = sessionInitEvent.getSession();
                List<UIProvider> uiProviders = new ArrayList<UIProvider>(session.getUIProviders());
                for (UIProvider provider : uiProviders) {
                    // use canonical names as these may have been loaded with
                    // different classloaders
                    if (DefaultUIProvider.class.getCanonicalName().equals(provider.getClass().getCanonicalName())) {
                        session.removeUIProvider(provider);
                    }
                }

                // add Spring UI provider
                SpringUIProvider uiProvider = new MdwUIProvider(webApplicationContext);
                session.addUIProvider(uiProvider);
            }
        });
    }

}