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.zoneitem;
017
018import java.util.Map;
019
020import javax.jcr.Node;
021import javax.jcr.PropertyIterator;
022import javax.jcr.RepositoryException;
023
024import org.apache.avalon.framework.service.ServiceException;
025import org.apache.avalon.framework.service.ServiceManager;
026
027import org.ametys.cms.repository.Content;
028import org.ametys.core.observation.Event;
029import org.ametys.plugins.repository.AmetysObject;
030import org.ametys.plugins.repository.AmetysObjectResolver;
031import org.ametys.plugins.repository.jcr.JCRAmetysObject;
032import org.ametys.web.ObservationConstants;
033import org.ametys.web.repository.content.WebContent;
034import org.ametys.web.repository.page.ZoneItem;
035
036/**
037 * Invalidates the ZoneItem containing a Content which has just been validated or unpublished.
038 */
039public class InvalidateZoneItemCacheOnContentValidationObserver extends AbstractZoneItemCacheObserver
040{
041    private AmetysObjectResolver _resolver;
042    
043    @Override
044    public void service(ServiceManager manager) throws ServiceException
045    {
046        super.service(manager);
047        _resolver = (AmetysObjectResolver) manager.lookup(AmetysObjectResolver.ROLE);
048    }
049    
050    @Override
051    public boolean supports(Event event)
052    {
053        return event.getId().equals(org.ametys.cms.ObservationConstants.EVENT_CONTENT_VALIDATED)
054            || event.getId().equals(ObservationConstants.EVENT_CONTENT_UNPUBLISHED);
055    }
056
057    @Override
058    public void observe(Event event, Map<String, Object> transientVars) throws Exception
059    {
060        Content content = (Content) event.getArguments().get(org.ametys.cms.ObservationConstants.ARGS_CONTENT);
061        
062        if (content instanceof JCRAmetysObject && content instanceof WebContent)
063        {
064            try
065            {
066                String site = ((WebContent) content).getSiteName();
067                        
068                PropertyIterator it = ((JCRAmetysObject) content).getNode().getReferences();
069                while (it.hasNext())
070                {
071                    Node refererNode = it.nextProperty().getParent();
072                    
073                    AmetysObject ao = _resolver.resolve(refererNode, true);
074                    
075                    if (ao != null && ao instanceof ZoneItem)
076                    {
077                        _zoneItemCache.removeItem("live", site, "CONTENT", ao.getId());
078                    }
079                }
080            }
081            catch (RepositoryException e)
082            {
083                getLogger().error("Unable to get referencing ZoneItems for content '" + content.getId() + "' while processing event " + event, e);
084            }
085        }
086        
087    }
088}