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