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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
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 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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package com.sun.xml.ws.transport.tcp.server.glassfish;

import com.sun.xml.ws.api.server.Container;
import com.sun.xml.ws.transport.http.DeploymentDescriptorParser;
import com.sun.xml.ws.transport.tcp.resources.MessagesMessages;
import com.sun.xml.ws.transport.tcp.server.TCPAdapter;
import com.sun.xml.ws.transport.tcp.server.TCPContext;
import com.sun.xml.ws.transport.tcp.server.TCPResourceLoader;
import com.sun.xml.ws.transport.tcp.server.TCPServletContext;
import java.io.IOException;
import java.net.URL;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextAttributeEvent;
import javax.servlet.ServletContextAttributeListener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.ws.WebServiceException;

/**
 * @author JAX-WS team
 */
@SuppressWarnings({"unchecked"})
public final class WSStartupServlet extends HttpServlet
        implements ServletContextAttributeListener, ServletContextListener {
    
    private static final Logger logger = Logger.getLogger(
            com.sun.xml.ws.transport.tcp.util.TCPConstants.LoggingDomain + ".server");
    
    private static final String JAXWS_RI_RUNTIME = "/WEB-INF/sun-jaxws.xml";
    
    private WSTCPLifeCycleModule transportModule;
    
    private List<TCPAdapter> adapters;
    
    protected void doPost(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
    }
    
    protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
    }
    
    public void contextInitialized(final ServletContextEvent contextEvent) {
        logger.log(Level.FINE, "WSStartupServlet.contextInitialized");
        final ServletContext servletContext = contextEvent.getServletContext();
        final TCPContext context = new TCPServletContext(servletContext);
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        if (classLoader == null) {
            classLoader = getClass().getClassLoader();
        }
        final ServletContainer container = new ServletContainer(servletContext);
        
        try {
            transportModule = WSTCPLifeCycleModule.getInstance();
            final DeploymentDescriptorParser<TCPAdapter> parser = new DeploymentDescriptorParser<TCPAdapter>(
                    classLoader, new TCPResourceLoader(context), container, TCPAdapter.FACTORY);
            final URL sunJaxWsXml = context.getResource(JAXWS_RI_RUNTIME);
            if(sunJaxWsXml==null)
                throw new WebServiceException(MessagesMessages.WSTCP_0014_NO_JAXWS_DESCRIPTOR());
            adapters = parser.parse(sunJaxWsXml.toExternalForm(), sunJaxWsXml.openStream());
            
            transportModule.register(servletContext.getContextPath(), adapters);
        } catch (Exception e) {
            logger.log(Level.SEVERE, e.getMessage(), e);
            throw new IllegalStateException("listener.parsingFailed", e);
        }
    }
    
    public void contextDestroyed(final ServletContextEvent contextEvent) {
        logger.log(Level.FINE, "WSStartupServlet.contextDestroyed");
        if (transportModule != null && adapters != null) {
            transportModule.free(contextEvent.getServletContext().getContextPath(),
                    adapters);
        }
    }
    
    public void attributeAdded(final ServletContextAttributeEvent scab) {
    }
    
    public void attributeRemoved(final ServletContextAttributeEvent scab) {
    }
    
    public void attributeReplaced(final ServletContextAttributeEvent scab) {
    }
    
    /**
     * Provides access to {@link ServletContext} via {@link Container}. Pipes
     * can get ServletContext from Container and use it to load some resources.
     */
    private static final class ServletContainer extends Container {
        private final ServletContext servletContext;
        
        ServletContainer(final ServletContext servletContext) {
            this.servletContext = servletContext;
        }
        
        public <T> T getSPI(final Class<T> spiType) {
            if (spiType == ServletContext.class) {
                return (T) servletContext;
            }
            return null;
        }
    }
}