001/*
002 *  Copyright 2010 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.Session;
021
022import org.ametys.core.observation.Event;
023import org.ametys.core.observation.Observer;
024import org.ametys.web.ObservationConstants;
025import org.ametys.web.repository.page.SitemapElement;
026import org.ametys.web.repository.site.Site;
027import org.ametys.web.repository.sitemap.Sitemap;
028
029/**
030 * {@link Observer} for observing page deletion in order to 
031 * invalidate cache on front-office.
032 */
033public class InvalidateCacheOnPageDeletionObserver extends AbstractSiteCacheObserver
034{
035    @Override
036    public boolean supports(Event event)
037    {
038        return event.getId().equals(ObservationConstants.EVENT_PAGE_DELETED);
039    }
040    
041    @Override
042    protected Site _getSite(Event event)
043    {
044        return ((Sitemap) event.getArguments().get(ObservationConstants.ARGS_SITEMAP)).getSite();
045    }
046    
047    @Override
048    protected void _internalObserve(Event event, Site site, Session liveSession) throws Exception
049    {
050        if (getLogger().isInfoEnabled())
051        {
052            getLogger().info("Page deletion: " + event + ", invalidating cache");
053        }
054        
055        Map<String, Object> args = event.getArguments();
056        String pageId = (String) args.get(ObservationConstants.ARGS_PAGE_ID);
057        String pathInSitemap = (String) args.get("pathInSitemap");
058        SitemapElement sitemapElement = (SitemapElement) args.get(ObservationConstants.ARGS_PAGE_PARENT);
059        
060        _cachePolicy.invalidateCacheOnPageDeletion(site, sitemapElement, pageId, pathInSitemap);
061    }
062}