001/* 002 * (C) Copyright 2006-2013 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 * Vladimir Pasquier <vpasquier@nuxeo.com> 018 * Laurent Doguin <ldoguin@nuxeo.com> 019 */ 020package org.nuxeo.ecm.platform.thumbnail.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.thumbnail.listener.UpdateThumbnailListener.THUMBNAIL_UPDATED; 025 026import org.apache.logging.log4j.LogManager; 027import org.apache.logging.log4j.Logger; 028import org.nuxeo.ecm.core.api.DocumentModel; 029import org.nuxeo.ecm.core.api.model.Property; 030import org.nuxeo.ecm.core.event.Event; 031import org.nuxeo.ecm.core.event.EventContext; 032import org.nuxeo.ecm.core.event.EventListener; 033import org.nuxeo.ecm.core.event.EventService; 034import org.nuxeo.ecm.core.event.impl.DocumentEventContext; 035import org.nuxeo.ecm.platform.thumbnail.ThumbnailConstants; 036import org.nuxeo.runtime.api.Framework; 037 038/** 039 * Thumbnail listener handling document blob update, checking for changes, for documents holding default the schema 040 * named "file". 041 * <P> 042 * Fires an event if it's the case, caught by asynchronous listener at {@link UpdateThumbnailListener}. 043 * 044 * @since 5.7 045 */ 046public class CheckBlobUpdateListener implements EventListener { 047 048 private static final Logger log = LogManager.getLogger(CheckBlobUpdateListener.class); 049 050 @Override 051 public void handleEvent(Event event) { 052 EventContext ec = event.getContext(); 053 if (!(ec instanceof DocumentEventContext)) { 054 return; 055 } 056 DocumentEventContext context = (DocumentEventContext) ec; 057 DocumentModel doc = context.getSourceDocument(); 058 if (!doc.hasSchema("file")) { 059 return; 060 } 061 062 Property content = doc.getProperty("file:content"); 063 // Only perform the thumbnail update at creation or modification if the content is marked as changed and the 064 // thumbnail has not already been updated. This additional check is needed to avoid an infinite loop. 065 if (DOCUMENT_CREATED.equals(event.getName()) 066 || content.isDirty() && !Boolean.TRUE.equals(ec.getProperty(THUMBNAIL_UPDATED))) { 067 068 if (BEFORE_DOC_UPDATE.equals(event.getName()) && doc.hasFacet(ThumbnailConstants.THUMBNAIL_FACET) 069 && content.getValue() == null) { 070 doc.setPropertyValue(ThumbnailConstants.THUMBNAIL_PROPERTY_NAME, null); 071 } 072 073 if (content.getValue() != null) { 074 doc.addFacet(ThumbnailConstants.THUMBNAIL_FACET); 075 076 // only skip sending the event: facet addition is needed for later recomputation 077 if (Boolean.TRUE.equals(context.getProperty(ThumbnailConstants.DISABLE_THUMBNAIL_COMPUTATION))) { 078 log.trace("Thumbnail computation is disabled for document {}", doc::getId); 079 return; 080 } 081 Framework.getService(EventService.class) 082 .fireEvent(ThumbnailConstants.EventNames.scheduleThumbnailUpdate.name(), context); 083 } 084 } 085 } 086 087}