001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.ecm.webengine.jaxrs.servlet.config;
020
021import java.util.ArrayList;
022
023import javax.servlet.ServletConfig;
024import javax.servlet.ServletContextEvent;
025import javax.servlet.ServletContextListener;
026
027import org.nuxeo.common.xmap.annotation.XNodeList;
028import org.nuxeo.common.xmap.annotation.XObject;
029import org.nuxeo.ecm.webengine.jaxrs.BundleNotFoundException;
030
031/**
032 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
033 */
034@XObject("listeners")
035public class ListenerSetDescriptor {
036
037    @XNodeList(value = "listener", type = ArrayList.class, componentType = ListenerDescriptor.class, trim = true, nullByDefault = false)
038    protected ArrayList<ListenerDescriptor> listenerDescriptors;
039
040    private ServletContextListener[] listeners;
041
042    private ServletContextEvent event;
043
044    public synchronized boolean isInitialized() {
045        return event != null;
046    }
047
048    public synchronized void init(ServletConfig config) throws ReflectiveOperationException, BundleNotFoundException {
049        if (event == null && !listenerDescriptors.isEmpty()) {
050            event = new ServletContextEvent(config.getServletContext());
051            listeners = new ServletContextListener[listenerDescriptors.size()];
052            for (int i = 0; i < listeners.length; i++) {
053                ListenerDescriptor ld = listenerDescriptors.get(i);
054                listeners[i] = ld.getListener();
055                listeners[i].contextInitialized(event);
056            }
057        }
058    }
059
060    public synchronized boolean destroy() {
061        if (event != null) {
062            if (listeners != null) {
063                try {
064                    for (ServletContextListener listener : listeners) {
065                        listener.contextDestroyed(event);
066                    }
067                } finally {
068                    event = null;
069                    listeners = null;
070                }
071                return true;
072            }
073        }
074        return false;
075    }
076
077    @Override
078    public String toString() {
079        return listenerDescriptors.toString();
080    }
081
082}