001/*
002 *  Copyright 2011 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.blog.observer;
017
018import java.util.Map;
019
020import org.apache.avalon.framework.context.Context;
021import org.apache.avalon.framework.context.ContextException;
022import org.apache.avalon.framework.context.Contextualizable;
023import org.apache.avalon.framework.service.ServiceException;
024import org.apache.avalon.framework.service.ServiceManager;
025import org.apache.avalon.framework.service.Serviceable;
026import org.apache.cocoon.components.ContextHelper;
027import org.apache.cocoon.environment.Request;
028import org.apache.commons.lang3.ArrayUtils;
029
030import org.ametys.cms.repository.Content;
031import org.ametys.core.observation.Event;
032import org.ametys.core.observation.Observer;
033import org.ametys.plugins.blog.BlogConstants;
034import org.ametys.plugins.blog.BlogPageHandler;
035import org.ametys.plugins.repository.AmetysObjectResolver;
036import org.ametys.plugins.repository.UnknownAmetysObjectException;
037import org.ametys.plugins.repository.provider.RequestAttributeWorkspaceSelector;
038import org.ametys.runtime.plugin.component.AbstractLogEnabled;
039import org.ametys.web.WebConstants;
040import org.ametys.web.indexing.solr.SolrPageIndexer;
041import org.ametys.web.repository.content.WebContent;
042import org.ametys.web.repository.page.Page;
043
044/**
045 * Abstract {@link Observer} for observing event on blog
046 */
047public abstract class AbstractBlogObserver extends AbstractLogEnabled implements Observer, Contextualizable, Serviceable
048//public abstract class AbstractBlogObserver extends AbstractLiveSolrObserver
049{
050    /** The context. */
051    protected Context _context;
052    /** The blog cache manager */
053    protected BlogPageHandler _blogRootPageHandler;
054    /** The ametys object resolver. */
055    protected AmetysObjectResolver _resolver;
056    /** The solr page indexer. */
057    protected SolrPageIndexer _solrPageIndexer;
058    
059    @Override
060    public void contextualize(Context context) throws ContextException
061    {
062        _context = context;
063    }
064    
065    @Override
066    public void service(ServiceManager smanager) throws ServiceException
067    {
068        _resolver = (AmetysObjectResolver) smanager.lookup(AmetysObjectResolver.ROLE);
069        _solrPageIndexer = (SolrPageIndexer) smanager.lookup(SolrPageIndexer.ROLE);
070        _blogRootPageHandler = (BlogPageHandler) smanager.lookup(BlogPageHandler.ROLE);
071    }
072    
073    @Override
074    public int getPriority(Event event)
075    {
076        // Will be processed after live synchronization observers
077        return MAX_PRIORITY + 3000;
078    }
079    
080    @Override
081    public void observe(Event event, Map<String, Object> transientVars) throws Exception
082    {
083        Map<String, Object> args = event.getArguments();
084        
085        Content content = (Content) args.get(org.ametys.cms.ObservationConstants.ARGS_CONTENT);
086        
087        if (content != null && ArrayUtils.contains(content.getTypes(), BlogConstants.POST_CONTENT_TYPE))
088        {
089            // Retrieve current workspace
090            Request request = ContextHelper.getRequest(_context);
091            String currentWsp = RequestAttributeWorkspaceSelector.getForcedWorkspace(request);
092            
093            try
094            {
095                // Use live workspace
096                RequestAttributeWorkspaceSelector.setForcedWorkspace(request, WebConstants.LIVE_WORKSPACE);
097                
098                Content liveContent = null;
099                try
100                {
101                    // Retrieve page in the live workspace
102                    liveContent = _resolver.resolveById(content.getId());
103                }
104                catch (UnknownAmetysObjectException e)
105                {
106                    // Page is not synchronized
107                }
108                
109                if (liveContent != null)
110                {
111                    Page postPage = _blogRootPageHandler.getPostPage((WebContent) content);
112                    _internalObserve (event, postPage, (WebContent) content);
113                }
114            }
115            finally
116            {
117                // Restore context
118                RequestAttributeWorkspaceSelector.setForcedWorkspace(request, currentWsp);
119            }
120        }
121    }
122    
123    /**
124     * Do the actual work.
125     * @param event the observation event.
126     * @param postPage the Page holding the virtual factory.
127     * @param postContent the post content
128     */
129    protected abstract void _internalObserve(Event event, Page postPage, WebContent postContent);
130   
131}