001/*
002 * (C) Copyright 2006-2020 Nuxeo (http://nuxeo.com/) and others.
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 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 */
019
020package org.nuxeo.ecm.platform.comment.listener;
021
022import static org.nuxeo.ecm.platform.comment.api.CommentManager.Feature.COMMENTS_LINKED_WITH_PROPERTY;
023
024import java.util.List;
025
026import org.apache.commons.logging.Log;
027import org.apache.commons.logging.LogFactory;
028import org.nuxeo.ecm.core.api.CoreSession;
029import org.nuxeo.ecm.core.api.DocumentModel;
030import org.nuxeo.ecm.core.api.DocumentNotFoundException;
031import org.nuxeo.ecm.core.event.PostCommitEventListener;
032import org.nuxeo.ecm.platform.comment.api.CommentManager;
033import org.nuxeo.ecm.platform.comment.service.CommentServiceConfig;
034import org.nuxeo.ecm.platform.relations.api.Graph;
035import org.nuxeo.ecm.platform.relations.api.QNameResource;
036import org.nuxeo.ecm.platform.relations.api.RelationManager;
037import org.nuxeo.ecm.platform.relations.api.Resource;
038import org.nuxeo.ecm.platform.relations.api.Statement;
039import org.nuxeo.runtime.api.Framework;
040
041public class DocumentRemovedCommentEventListener extends AbstractCommentListener implements PostCommitEventListener {
042
043    private static final Log log = LogFactory.getLog(DocumentRemovedCommentEventListener.class);
044
045    @Override
046    protected void doProcess(CoreSession coreSession, RelationManager relationManager, CommentServiceConfig config,
047            DocumentModel docMessage) {
048        log.debug("Processing relations cleanup on Document removal");
049        CommentManager commentManager = Framework.getService(CommentManager.class);
050        if (commentManager.hasFeature(COMMENTS_LINKED_WITH_PROPERTY)) {
051            deleteCommentChildren(coreSession, commentManager, docMessage);
052            coreSession.save();
053        } else if (relationManager != null) {
054            onDocumentRemoved(coreSession, relationManager, config, docMessage);
055        } else {
056            log.info("Migration in progress or relation manager is missing");
057        }
058    }
059
060    private static void onDocumentRemoved(CoreSession coreSession, RelationManager relationManager,
061            CommentServiceConfig config, DocumentModel docMessage) {
062
063        Resource documentRes = relationManager.getResource(config.documentNamespace, docMessage, null);
064        if (documentRes == null) {
065            log.error("Could not adapt document model to relation resource ; "
066                    + "check the service relation adapters configuration");
067            return;
068        }
069        Graph graph = relationManager.getGraph(config.graphName, coreSession);
070        List<Statement> statementList = graph.getStatements(null, null, documentRes);
071
072        // remove comments
073        for (Statement stmt : statementList) {
074            QNameResource resource = (QNameResource) stmt.getSubject();
075            String commentId = resource.getLocalName();
076            DocumentModel docModel = (DocumentModel) relationManager.getResourceRepresentation(config.commentNamespace,
077                    resource, null);
078
079            if (docModel != null) {
080                try {
081                    coreSession.removeDocument(docModel.getRef());
082                    log.debug("comment removal succeded for id: " + commentId);
083                } catch (DocumentNotFoundException e) {
084                    log.error("comment removal failed", e);
085                }
086            } else {
087                log.warn("comment not found: id=" + commentId);
088            }
089        }
090        coreSession.save();
091        // remove relations
092        graph.remove(statementList);
093    }
094
095}