001/*
002 * (C) Copyright 2010 Nuxeo SA (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.video.listener;
021
022import static org.nuxeo.ecm.core.api.event.DocumentEventTypes.BEFORE_DOC_UPDATE;
023import static org.nuxeo.ecm.core.api.event.DocumentEventTypes.DOCUMENT_CREATED;
024import static org.nuxeo.ecm.platform.video.VideoConstants.CTX_FORCE_INFORMATIONS_GENERATION;
025import static org.nuxeo.ecm.platform.video.VideoConstants.TRANSCODED_VIDEOS_PROPERTY;
026import static org.nuxeo.ecm.platform.video.VideoConstants.VIDEO_FACET;
027
028import java.io.IOException;
029
030import org.apache.commons.logging.Log;
031import org.apache.commons.logging.LogFactory;
032import org.nuxeo.ecm.core.api.DocumentModel;
033import org.nuxeo.ecm.core.api.NuxeoException;
034import org.nuxeo.ecm.core.event.Event;
035import org.nuxeo.ecm.core.event.EventContext;
036import org.nuxeo.ecm.core.event.EventListener;
037import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
038import org.nuxeo.ecm.core.work.api.WorkManager;
039import org.nuxeo.ecm.platform.video.VideoHelper;
040import org.nuxeo.ecm.platform.video.service.VideoInfoWork;
041import org.nuxeo.runtime.api.Framework;
042
043/**
044 * Light synchronous listener that schedules an asynchronous work to process the video info of a document.
045 * <p>
046 * This {@link VideoInfoWork} will in turn schedule two asynchronous works to process the video storyboard and
047 * conversions.
048 *
049 * @since 5.5
050 */
051public class VideoChangedListener implements EventListener {
052
053    private static final Log log = LogFactory.getLog(VideoChangedListener.class);
054
055    @Override
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        String eventName = event.getName();
064        if (shouldProcess(doc, eventName)) {
065            if (BEFORE_DOC_UPDATE.equals(eventName)) {
066                try {
067                    resetProperties(doc);
068                } catch (IOException e) {
069                    throw new NuxeoException(
070                            String.format("Error while resetting video properties of document %s.", doc), e);
071                }
072            }
073            scheduleAsyncProcessing(doc);
074        }
075    }
076
077    protected boolean shouldProcess(DocumentModel doc, String eventName) {
078        return doc.hasFacet(VIDEO_FACET) && !doc.isProxy()
079                && (Boolean.TRUE.equals(doc.getContextData(CTX_FORCE_INFORMATIONS_GENERATION))
080                        || DOCUMENT_CREATED.equals(eventName) || doc.getProperty("file:content").isDirty());
081    }
082
083    protected void resetProperties(DocumentModel doc) throws IOException {
084        log.debug(String.format("Resetting video info, storyboard, previews and conversions of document %s.", doc));
085        VideoHelper.updateVideoInfo(doc, null);
086        VideoHelper.updateStoryboard(doc, null);
087        VideoHelper.updatePreviews(doc, null);
088        doc.setPropertyValue(TRANSCODED_VIDEOS_PROPERTY, null);
089    }
090
091    protected void scheduleAsyncProcessing(DocumentModel doc) {
092        WorkManager workManager = Framework.getService(WorkManager.class);
093        VideoInfoWork work = new VideoInfoWork(doc.getRepositoryName(), doc.getId());
094        log.debug(String.format("Scheduling work: video info of document %s.", doc));
095        workManager.schedule(work, true);
096    }
097
098}