001/*
002 * (C) Copyright 2014 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Vladimir Pasquier <vpasquier@nuxeo.com>
016 */
017
018package org.nuxeo.binary.metadata.internals.listeners;
019
020import static org.nuxeo.ecm.core.api.event.DocumentEventTypes.ABOUT_TO_CREATE;
021import static org.nuxeo.ecm.core.api.event.DocumentEventTypes.BEFORE_DOC_UPDATE;
022
023import org.nuxeo.binary.metadata.api.BinaryMetadataConstants;
024import org.nuxeo.binary.metadata.api.BinaryMetadataService;
025import org.nuxeo.ecm.core.api.DocumentModel;
026import org.nuxeo.ecm.core.event.Event;
027import org.nuxeo.ecm.core.event.EventContext;
028import org.nuxeo.ecm.core.event.EventListener;
029import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
030import org.nuxeo.runtime.api.Framework;
031
032/**
033 * Handle document and blob updates according to following rules in an event context: - Define if rule should be
034 * executed in async or sync mode. - If Blob dirty and document metadata dirty, write metadata from doc to Blob. - If
035 * Blob dirty and document metadata not dirty, write metadata from Blob to doc. - If Blob not dirty and document
036 * metadata dirty, write metadata from doc to Blob.
037 *
038 * @since 7.1
039 */
040public class BinaryMetadataSyncListener implements EventListener {
041
042    @Override
043    public void handleEvent(Event event) {
044        EventContext ctx = event.getContext();
045        if (!(ctx instanceof DocumentEventContext)) {
046            return;
047        }
048        BinaryMetadataService binaryMetadataService = Framework.getLocalService(BinaryMetadataService.class);
049        DocumentEventContext docCtx = (DocumentEventContext) ctx;
050        DocumentModel doc = docCtx.getSourceDocument();
051        Boolean disable = (Boolean) event.getContext().getProperty(
052                BinaryMetadataConstants.DISABLE_BINARY_METADATA_LISTENER);
053        if (ABOUT_TO_CREATE.equals(event.getName()) && !doc.isProxy() && disable == null) {
054            binaryMetadataService.writeMetadata(doc, docCtx.getCoreSession());
055        } else if (BEFORE_DOC_UPDATE.equals(event.getName()) && !doc.isProxy() && disable == null) {
056            doc.putContextData(BinaryMetadataConstants.DISABLE_BINARY_METADATA_LISTENER, Boolean.TRUE);
057            binaryMetadataService.handleSyncUpdate(doc, docCtx);
058        }
059    }
060
061}