001/*
002 *  Copyright 2012 Anyware Services
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 */
016package org.ametys.web.cache;
017
018import java.util.Map;
019
020import javax.jcr.Node;
021import javax.jcr.Session;
022
023import org.ametys.core.observation.Event;
024import org.ametys.core.observation.Observer;
025import org.ametys.plugins.repository.jcr.JCRAmetysObject;
026import org.ametys.web.ObservationConstants;
027import org.ametys.web.repository.page.Page;
028import org.ametys.web.repository.page.ZoneItem.ZoneType;
029import org.ametys.web.repository.site.Site;
030
031/**
032 * {@link Observer} for observing zone item addition in order to invalidate cache on front-office.
033 */
034public class InvalidateCacheOnZoneItemAdditionObserver extends AbstractSiteCacheObserver
035{
036    @Override
037    public boolean supports(Event event)
038    {
039        return event.getId().equals(ObservationConstants.EVENT_ZONEITEM_ADDED);
040    }
041    
042    @Override
043    protected Site _getSite(Event event)
044    {
045        return _getPage(event).getSite();
046    }
047    
048    private Page _getPage(Event event)
049    {
050        return (Page) event.getArguments().get(ObservationConstants.ARGS_PAGE);
051    }
052    
053    @Override
054    protected void _internalObserve(Event event, Site site, Session liveSession) throws Exception
055    {
056        Page page = _getPage(event);
057        
058        Map<String, Object> args = event.getArguments();
059        
060        ZoneType type = (ZoneType) args.get(ObservationConstants.ARGS_ZONE_TYPE);
061        
062        if (ZoneType.CONTENT.equals(type))
063        {
064            _cachePolicy.invalidateCacheOnPageModification(page);
065        }
066        else
067        {
068            if (page instanceof JCRAmetysObject)
069            {
070                JCRAmetysObject jcrPage = (JCRAmetysObject) page;
071                Node pageNode = jcrPage.getNode();
072                
073                if (liveSession.itemExists(pageNode.getPath()))
074                {
075                    _cachePolicy.invalidateCacheOnPageMinorChange(page);
076                }
077            }
078        }
079    }
080    
081}