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https://github.com/Alfresco/alfresco-community-repo.git
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175e8a7420
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@32129 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
362 lines
14 KiB
Java
362 lines
14 KiB
Java
/*
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* Copyright (C) 2005-2011 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.rendition;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import org.alfresco.model.RenditionModel;
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import org.alfresco.repo.copy.CopyBehaviourCallback;
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import org.alfresco.repo.copy.CopyDetails;
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import org.alfresco.repo.copy.CopyServicePolicies;
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import org.alfresco.repo.copy.DefaultCopyBehaviourCallback;
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import org.alfresco.repo.node.NodeServicePolicies;
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import org.alfresco.repo.policy.Behaviour;
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import org.alfresco.repo.policy.JavaBehaviour;
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import org.alfresco.repo.policy.PolicyComponent;
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import org.alfresco.repo.rendition.executer.AbstractRenderingEngine;
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import org.alfresco.repo.rendition.executer.DeleteRenditionActionExecuter;
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import org.alfresco.repo.security.authentication.AuthenticationUtil;
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import org.alfresco.service.cmr.action.Action;
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import org.alfresco.service.cmr.action.ActionService;
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import org.alfresco.service.cmr.dictionary.DataTypeDefinition;
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import org.alfresco.service.cmr.dictionary.DictionaryService;
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import org.alfresco.service.cmr.dictionary.PropertyDefinition;
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import org.alfresco.service.cmr.rendition.RenderCallback;
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import org.alfresco.service.cmr.rendition.RenditionDefinition;
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import org.alfresco.service.cmr.rendition.RenditionService;
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import org.alfresco.service.cmr.repository.ChildAssociationRef;
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import org.alfresco.service.cmr.repository.NodeRef;
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import org.alfresco.service.cmr.repository.NodeService;
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import org.alfresco.service.namespace.NamespaceService;
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import org.alfresco.service.namespace.QName;
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import org.alfresco.util.EqualsHelper;
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import org.alfresco.util.Pair;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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* Renditioned aspect behaviour bean.
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* When any node with the renditioned aspect has a property updated, then all
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* associated renditions are eligible for re-rendering.
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* Each rendition (as identified by the name in its rn:rendition association) will
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* be loaded and if the renditionDefinition exists, the rendition will be updated
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* asynchronously, subject to the defined update policy.
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*
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* @author Neil McErlean
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* @author Roy Wetherall
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*/
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public class RenditionedAspect implements NodeServicePolicies.OnUpdatePropertiesPolicy,
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CopyServicePolicies.OnCopyNodePolicy
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{
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/** logger */
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private static final Log logger = LogFactory.getLog(RenditionedAspect.class);
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/** Services */
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private ActionService actionService;
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private DictionaryService dictionaryService;
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private NodeService nodeService;
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private PolicyComponent policyComponent;
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private RenditionService renditionService;
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/**
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* Set the policy component
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*
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* @param policyComponent policy component
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*/
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public void setPolicyComponent(PolicyComponent policyComponent)
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{
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this.policyComponent = policyComponent;
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}
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/**
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* @since 3.4.2
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*/
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public void setActionService(ActionService actionService)
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{
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this.actionService = actionService;
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}
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/**
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* Set the node service
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*
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* @param nodeService node service
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*/
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public void setNodeService(NodeService nodeService)
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{
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this.nodeService = nodeService;
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}
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/**
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* Set the rendition service
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*
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* @param renditionService rendition service
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*/
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public void setRenditionService(RenditionService renditionService)
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{
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this.renditionService = renditionService;
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}
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/**
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* Set the dictionary service
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*
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* @param dictionaryService dictionary service
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*/
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public void setDictionaryService(DictionaryService dictionaryService)
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{
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this.dictionaryService = dictionaryService;
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}
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/**
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* Initialise method
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*/
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public void init()
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{
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this.policyComponent.bindClassBehaviour(
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QName.createQName(NamespaceService.ALFRESCO_URI, "onUpdateProperties"),
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RenditionModel.ASPECT_RENDITIONED,
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new JavaBehaviour(this, "onUpdateProperties", Behaviour.NotificationFrequency.EVERY_EVENT));
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this.policyComponent.bindClassBehaviour(
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QName.createQName(NamespaceService.ALFRESCO_URI, "getCopyCallback"),
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RenditionModel.ASPECT_RENDITIONED,
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new JavaBehaviour(this, "getCopyCallback"));
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}
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/**
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* @see org.alfresco.repo.node.NodeServicePolicies.OnUpdatePropertiesPolicy#onUpdateProperties(org.alfresco.service.cmr.repository.NodeRef, java.util.Map, java.util.Map)
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*/
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public void onUpdateProperties(
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NodeRef nodeRef,
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Map<QName, Serializable> before,
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Map<QName, Serializable> after)
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{
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if (this.nodeService.exists(nodeRef))
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{
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// Find the changed properties
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List<QName> changedProperties = getChangedProperties(before, after);
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// There may be a different policy for different rendition kinds.
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List<ChildAssociationRef> renditions = this.renditionService.getRenditions(nodeRef);
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for (ChildAssociationRef chAssRef : renditions)
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{
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final QName renditionAssocName = chAssRef.getQName();
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// Rendition Definitions are persisted underneath the Data Dictionary for which Group ALL
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// has Consumer access by default. However, we cannot assume that that access level applies for all deployments. See ALF-7334.
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RenditionDefinition rendDefn = AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<RenditionDefinition>()
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{
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@Override
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public RenditionDefinition doWork() throws Exception
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{
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return renditionService.loadRenditionDefinition(renditionAssocName);
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}
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}, AuthenticationUtil.getSystemUserName());
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if (rendDefn == null)
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{
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if (logger.isDebugEnabled())
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{
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StringBuilder msg = new StringBuilder();
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msg.append("Cannot update rendition ")
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.append(renditionAssocName)
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.append(" on node ").append(nodeRef)
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.append(" as the renditionDefinition could not be loaded.");
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logger.debug(msg.toString());
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}
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continue;
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}
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Serializable updateRenditionsPolicy = rendDefn.getParameterValue(AbstractRenderingEngine.PARAM_UPDATE_RENDITIONS_ON_ANY_PROPERTY_CHANGE);
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boolean updateRenditionsAlways = updateRenditionsPolicy == null ? false : (Boolean)updateRenditionsPolicy;
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boolean renditionUpdateRequired = false;
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for (QName qname : changedProperties)
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{
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try
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{
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PropertyDefinition propertyDef = dictionaryService.getProperty(qname);
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if (propertyDef == null)
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{
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// the property is not recognised
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continue;
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}
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else if (!propertyDef.getDataType().getName().equals(DataTypeDefinition.CONTENT))
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{
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// not a content type
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if (updateRenditionsAlways)
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{
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renditionUpdateRequired = true;
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}
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continue;
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}
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else
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{
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// it is a content property. We always update renditions for changes to content.
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renditionUpdateRequired = true;
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}
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} catch (ClassCastException ccx)
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{
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// the property does not confirm to the model
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continue;
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}
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}
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if (renditionUpdateRequired)
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{
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this.queueUpdate(nodeRef, rendDefn, chAssRef);
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}
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}
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}
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}
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private List<QName> getChangedProperties(Map<QName, Serializable> before, Map<QName, Serializable> after)
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{
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List<QName> results = new ArrayList<QName>();
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for (QName propQName : before.keySet())
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{
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if (after.keySet().contains(propQName) == false)
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{
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// property was deleted
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results.add(propQName);
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}
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else
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{
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Serializable beforeValue = before.get(propQName);
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Serializable afterValue = after.get(propQName);
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if (EqualsHelper.nullSafeEquals(beforeValue, afterValue) == false)
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{
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// Property was changed
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results.add(propQName);
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}
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}
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}
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for (QName propQName : after.keySet())
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{
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if (before.containsKey(propQName) == false)
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{
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// property was added
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results.add(propQName);
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}
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}
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return results;
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}
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/**
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* Queue the update to happen asynchronously
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*
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* @param sourceNodeRef node reference
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*/
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private void queueUpdate(final NodeRef sourceNodeRef, final RenditionDefinition rendDefn,
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final ChildAssociationRef renditionAssoc)
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{
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if (logger.isDebugEnabled())
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{
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StringBuilder msg = new StringBuilder();
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msg.append("Queueing rendition update for node ").append(sourceNodeRef).append(": ").append(rendDefn.getRenditionName());
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logger.debug(msg.toString());
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}
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if (rendDefn != null)
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{
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Action deleteRendition = actionService.createAction(DeleteRenditionActionExecuter.NAME);
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deleteRendition.setParameterValue(DeleteRenditionActionExecuter.PARAM_RENDITION_DEFINITION_NAME, rendDefn.getRenditionName());
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rendDefn.setCompensatingAction(deleteRendition);
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renditionService.render(sourceNodeRef, rendDefn, new RenderCallback()
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{
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public void handleFailedRendition(Throwable t)
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{
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// In the event of a failed re-rendition, we will delete the rendition node
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if (logger.isDebugEnabled())
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{
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StringBuilder msg = new StringBuilder();
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msg.append("Re-rendering of node ")
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.append(sourceNodeRef)
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.append(" with renditionDefinition ")
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.append(rendDefn.getRenditionName())
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.append(" failed. Deleting defunct rendition. ")
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.append("The following exception is shown for informational purposes only ")
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.append("and does not affect operation of the system.");
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logger.debug(msg.toString(), t);
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}
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}
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public void handleSuccessfulRendition(ChildAssociationRef primaryParentOfNewRendition)
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{
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// Intentionally empty
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}
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});
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}
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}
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/**
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* @return Returns {@link RenditionedAspectCopyBehaviourCallback}
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*/
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public CopyBehaviourCallback getCopyCallback(QName classRef, CopyDetails copyDetails)
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{
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return RenditionedAspectCopyBehaviourCallback.INSTANCE;
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}
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/**
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* Behaviour for the {@link RenditionModel#ASPECT_RENDITIONED <b>rn:renditioned</b>} aspect.
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*
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* @author Derek Hulley
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* @author Neil McErlean
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* @since 3.2
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*/
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private static class RenditionedAspectCopyBehaviourCallback extends DefaultCopyBehaviourCallback
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{
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private static final CopyBehaviourCallback INSTANCE = new RenditionedAspectCopyBehaviourCallback();
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/**
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* We do not copy the {@link RenditionModel#ASPECT_RENDITIONED rn:renditioned} aspect.
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*/
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@Override
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public boolean getMustCopy(QName classQName, CopyDetails copyDetails)
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{
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return false;
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}
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@Override
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public Pair<AssocCopySourceAction, AssocCopyTargetAction> getAssociationCopyAction(
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QName classQName,
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CopyDetails copyDetails,
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CopyAssociationDetails assocCopyDetails)
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{
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return new Pair<AssocCopySourceAction, AssocCopyTargetAction>(
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AssocCopySourceAction.IGNORE,
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AssocCopyTargetAction.USE_COPIED_OTHERWISE_ORIGINAL_TARGET);
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}
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@Override
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public ChildAssocCopyAction getChildAssociationCopyAction(
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QName classQName,
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CopyDetails copyDetails,
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CopyChildAssociationDetails childAssocCopyDetails)
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{
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return ChildAssocCopyAction.IGNORE;
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}
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}
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}
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