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 javax.jcr.Session;
019
020import org.ametys.core.observation.Event;
021import org.ametys.core.observation.Observer;
022import org.ametys.web.ObservationConstants;
023import org.ametys.web.repository.page.Page;
024import org.ametys.web.repository.page.SitemapElement;
025import org.ametys.web.repository.page.ZoneItem.ZoneType;
026import org.ametys.web.repository.site.Site;
027
028/**
029 * {@link Observer} for observing zone item deletion in order to invalidate cache on front-office.
030 */
031public class InvalidateCacheOnZoneItemDeletionObserver extends AbstractSiteCacheObserver
032{
033    
034    @Override
035    public boolean supports(Event event)
036    {
037        return event.getId().equals(ObservationConstants.EVENT_ZONEITEM_DELETED) 
038                || event.getId().equals(ObservationConstants.EVENT_ZONEITEM_MODIFIED);
039    }
040    
041    @Override
042    protected Site _getSite(Event event)
043    {
044        return _getPage(event).getSite();
045    }
046    
047    private SitemapElement _getPage(Event event)
048    {
049        return (SitemapElement) event.getArguments().get(ObservationConstants.ARGS_SITEMAP_ELEMENT);
050    }
051    
052    @Override
053    protected void _internalObserve(Event event, Site site, Session liveSession) throws Exception
054    {
055        SitemapElement sitemapElement = _getPage(event);
056        
057        if (sitemapElement instanceof Page page) 
058        {
059            ZoneType type = (ZoneType) event.getArguments().get(ObservationConstants.ARGS_ZONE_TYPE);
060            
061            if (ZoneType.CONTENT.equals(type))
062            {
063                _cachePolicy.invalidateCacheOnPageModification(page);
064            }
065            else
066            {
067                _cachePolicy.invalidateCacheOnPageMinorChange(page);
068            }
069        }
070    }
071    
072}