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.plugins.odfweb.cachepolicy;
017
018import java.util.Arrays;
019import java.util.Collections;
020import java.util.HashSet;
021import java.util.List;
022import java.util.Map;
023import java.util.Set;
024
025import org.apache.avalon.framework.service.ServiceException;
026import org.apache.avalon.framework.service.ServiceManager;
027import org.apache.avalon.framework.service.Serviceable;
028
029import org.ametys.cms.ObservationConstants;
030import org.ametys.core.observation.Event;
031import org.ametys.odf.ProgramItem;
032import org.ametys.odf.coursepart.CoursePart;
033import org.ametys.odf.orgunit.OrgUnit;
034import org.ametys.odf.person.Person;
035import org.ametys.plugins.odfweb.repository.OdfPageHandler;
036import org.ametys.runtime.plugin.component.AbstractLogEnabled;
037import org.ametys.web.cache.pageelement.PageElementCachePolicy;
038import org.ametys.web.inputdata.SitemapInputData;
039import org.ametys.web.repository.site.Site;
040
041/**
042 * Cache policy for the sitemap, handling ODF virtual pages linked with contents.
043 * Used for the Sitemap InputData as well as for the Sitemap service, even if the page element cache is not the same.
044 */
045public class OdfVirtualPagesCachePolicy extends AbstractLogEnabled implements Serviceable, PageElementCachePolicy
046{
047    private static final Set<String> _ODF_PE_TYPES = new HashSet<>();
048    static
049    {
050        // Used for the Sitemap InputData as well as for the Sitemap service.
051        _ODF_PE_TYPES.add(SitemapInputData.class.getName());
052        _ODF_PE_TYPES.add("SERVICE:org.ametys.web.service.SitemapService");
053        _ODF_PE_TYPES.add("CONTENT");
054    }
055    
056    /** The ODF root page handler. */
057    protected OdfPageHandler _odfRootPageHandler;
058    
059    @Override
060    public void service(ServiceManager manager) throws ServiceException
061    {
062        _odfRootPageHandler = (OdfPageHandler) manager.lookup(OdfPageHandler.ROLE);
063    }
064    
065    @Override
066    public Set<String> getPageElementTypes()
067    {
068        return _ODF_PE_TYPES;
069    }
070    
071    @Override
072    public final PolicyResult shouldClearCache(String workspace, Site site, String pageElementType, Event event)
073    {
074        String id = event.getId();
075        
076        if (_getRemovingCacheEventIds(workspace).contains(id))
077        {
078            Map<String, Object> args = event.getArguments();
079            
080            if (args.containsKey(org.ametys.cms.ObservationConstants.ARGS_CONTENT))
081            {
082                Object object = args.get(org.ametys.cms.ObservationConstants.ARGS_CONTENT);
083                if (object instanceof ProgramItem || object instanceof CoursePart || object instanceof OrgUnit || object instanceof Person)
084                {
085                    if (_odfRootPageHandler.hasOdfRootPage(site))
086                    {
087                        return PolicyResult.REMOVE;
088                    }
089                }
090            }
091        }
092        
093        return PolicyResult.KEEP;
094    }
095    
096    @Override
097    public final PolicyResult shouldClearCache(String workspace, Site site, String pageElementType, String elementId, Event event)
098    {
099        // Never called because the first-level method never returns NEED_INFORMATION.
100        throw new UnsupportedOperationException("Should never be called.");
101    }
102    
103    /**
104     * Returns all event ids for which the cache should be removed.
105     * @param workspace the current JCR workspace.
106     * @return all event ids for which the cache should be removed.
107     */
108    protected List<String> _getRemovingCacheEventIds(String workspace)
109    {
110        if ("default".equals(workspace))
111        {
112            return Arrays.asList(ObservationConstants.EVENT_CONTENT_ADDED,
113                                 ObservationConstants.EVENT_CONTENT_MODIFIED,
114                                 ObservationConstants.EVENT_CONTENT_DELETED);
115        }
116        else if ("live".equals(workspace))
117        {
118            return Arrays.asList(ObservationConstants.EVENT_CONTENT_ADDED,
119                                 ObservationConstants.EVENT_CONTENT_VALIDATED,
120                                 ObservationConstants.EVENT_CONTENT_DELETED,
121                                 org.ametys.web.ObservationConstants.EVENT_CONTENT_UNPUBLISHED);
122        }
123        
124        return Collections.emptyList();
125    }
126}