001/* 002 * (C) Copyright 2010 Nuxeo SAS (http://nuxeo.com/) and contributors. 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.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 * Nuxeo - initial API and implementation 016 */ 017 018package org.nuxeo.ecm.platform.video.listener; 019 020import static org.nuxeo.ecm.core.api.CoreSession.ALLOW_VERSION_WRITE; 021import static org.nuxeo.ecm.platform.video.VideoConstants.HAS_STORYBOARD_FACET; 022import static org.nuxeo.ecm.platform.video.VideoConstants.VIDEO_CHANGED_EVENT; 023 024import java.io.IOException; 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.blobholder.BlobHolder; 031import org.nuxeo.ecm.core.event.Event; 032import org.nuxeo.ecm.core.event.EventBundle; 033import org.nuxeo.ecm.core.event.EventContext; 034import org.nuxeo.ecm.core.event.PostCommitFilteringEventListener; 035import org.nuxeo.ecm.core.event.impl.DocumentEventContext; 036import org.nuxeo.ecm.platform.video.VideoHelper; 037 038/** 039 * Core event listener to compute / update the storyboard of a Video document 040 * 041 * @author ogrisel 042 */ 043public class VideoStoryboardListener implements PostCommitFilteringEventListener { 044 045 public static final Log log = LogFactory.getLog(VideoStoryboardListener.class); 046 047 @Override 048 public void handleEvent(EventBundle events) { 049 for (Event event : events) { 050 if (VIDEO_CHANGED_EVENT.equals(event.getName())) { 051 handleEvent(event); 052 } 053 } 054 } 055 056 public void handleEvent(Event event) { 057 EventContext ctx = event.getContext(); 058 if (!(ctx instanceof DocumentEventContext)) { 059 return; 060 } 061 DocumentEventContext docCtx = (DocumentEventContext) ctx; 062 DocumentModel doc = docCtx.getSourceDocument(); 063 if (doc.hasFacet(HAS_STORYBOARD_FACET)) { 064 BlobHolder blobHolder = doc.getAdapter(BlobHolder.class); 065 VideoHelper.updateStoryboard(doc, blobHolder.getBlob()); 066 try { 067 VideoHelper.updatePreviews(doc, blobHolder.getBlob()); 068 } catch (IOException e) { 069 // this should only happen if the hard drive is full 070 log.error( 071 String.format("Failed to extract previews for video '%s': %s", doc.getTitle(), e.getMessage()), 072 e); 073 } 074 CoreSession session = docCtx.getCoreSession(); 075 if (doc.isVersion()) { 076 doc.putContextData(ALLOW_VERSION_WRITE, Boolean.TRUE); 077 } 078 session.saveDocument(doc); 079 session.save(); 080 } 081 } 082 083 @Override 084 public boolean acceptEvent(Event event) { 085 return VIDEO_CHANGED_EVENT.equals(event.getName()); 086 } 087}