Java tutorial
/** * ========================================================================================== * = JAHIA'S DUAL LICENSING - IMPORTANT INFORMATION = * ========================================================================================== * * Copyright (C) 2002-2015 Jahia Solutions Group SA. All rights reserved. * * THIS FILE IS AVAILABLE UNDER TWO DIFFERENT LICENSES: * 1/GPL OR 2/JSEL * * 1/ GPL * ====================================================================================== * * IF YOU DECIDE TO CHOSE THE GPL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS: * * "This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * As a special exception to the terms and conditions of version 2.0 of * the GPL (or any later version), you may redistribute this Program in connection * with Free/Libre and Open Source Software ("FLOSS") applications as described * in Jahia's FLOSS exception. You should have received a copy of the text * describing the FLOSS exception, also available here: * http://www.jahia.com/license" * * 2/ JSEL - Commercial and Supported Versions of the program * ====================================================================================== * * IF YOU DECIDE TO CHOOSE THE JSEL LICENSE, YOU MUST COMPLY WITH THE FOLLOWING TERMS: * * Alternatively, commercial and supported versions of the program - also known as * Enterprise Distributions - must be used in accordance with the terms and conditions * contained in a separate written agreement between you and Jahia Solutions Group SA. * * If you are unsure which license is appropriate for your use, * please contact the sales department at sales@jahia.com. * * * ========================================================================================== * = ABOUT JAHIA = * ========================================================================================== * * Rooted in Open Source CMS, Jahias Digital Industrialization paradigm is about * streamlining Enterprise digital projects across channels to truly control * time-to-market and TCO, project after project. * Putting an end to the Tunnel effect?, the Jahia Studio enables IT and * marketing teams to collaboratively and iteratively build cutting-edge * online business solutions. * These, in turn, are securely and easily deployed as modules and apps, * reusable across any digital projects, thanks to the Jahia Private App Store Software. * Each solution provided by Jahia stems from this overarching vision: * Digital Factory, Workspace Factory, Portal Factory and eCommerce Factory. * Founded in 2002 and headquartered in Geneva, Switzerland, * Jahia Solutions Group has its North American headquarters in Washington DC, * with offices in Chicago, Toronto and throughout Europe. * Jahia counts hundreds of global brands and governmental organizations * among its loyal customers, in more than 20 countries across the globe. * * For more information, please visit http://www.jahia.com */ package org.jahia.modules.dm.thumbnails.video.impl; import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.Calendar; import java.util.HashMap; import java.util.Map; import javax.jcr.Binary; import javax.jcr.PathNotFoundException; import javax.jcr.RepositoryException; import org.apache.commons.exec.CommandLine; import org.apache.commons.exec.DefaultExecutor; import org.apache.commons.exec.PumpStreamHandler; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOUtils; import org.apache.commons.lang.StringUtils; import org.apache.jackrabbit.value.BinaryImpl; import org.jahia.api.Constants; import org.jahia.dm.DocumentOperationException; import org.jahia.dm.thumbnails.VideoThumbnailService; import org.jahia.dm.utils.ProcessUtils; import org.jahia.services.content.JCRContentUtils; import org.jahia.services.content.JCRNodeWrapper; import org.jahia.utils.StringOutputStream; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.InitializingBean; /** * The video thumbnail generation service. * * @author Cdric Mailleux * @author Sergiy Shyrkov */ public class VideoThumbnailServiceImpl implements VideoThumbnailService, InitializingBean { private static final Logger logger = LoggerFactory.getLogger(VideoThumbnailServiceImpl.class); private boolean autodetect; private boolean enabled; private String executablePath = "ffmpeg"; private String parameters = "-y -itsoffset ${offset} -i ${input} -vcodec mjpeg -vframes 1 -an -f rawvideo -s ${size} ${output}"; private File workingDir; public void afterPropertiesSet() throws Exception { if (autodetect) { doAutodetect(); } } public boolean canHandle(JCRNodeWrapper fileNode) throws RepositoryException { if (!isEnabled()) { return false; } return fileNode.isNodeType("nt:file") && JCRContentUtils.isMimeTypeGroup(fileNode.getFileContent().getContentType(), "video"); } public boolean createThumbnailForNode(JCRNodeWrapper fileNode, String thumbnailName, int offsetSeconds, String thumbnailSize) throws RepositoryException, DocumentOperationException { if (!canHandle(fileNode)) { return false; } long timer = System.currentTimeMillis(); JCRNodeWrapper thumbNode = null; File source = null; File thumbnail = null; try { source = File.createTempFile("video-source", null); JCRContentUtils.downloadFileContent(fileNode, source); thumbnail = generateThumbnail(source, offsetSeconds, thumbnailSize); if (thumbnail != null && thumbnail.isFile()) { thumbNode = storeThumbnailNode(fileNode, thumbnail, thumbnailName); if (logger.isDebugEnabled()) { logger.debug("Generated thumbnail {} for node {} in {} ms", new Object[] { thumbNode.getPath(), fileNode.getPath(), (System.currentTimeMillis() - timer) }); } } } catch (Exception e) { logger.error(e.getMessage(), e); } finally { FileUtils.deleteQuietly(thumbnail); FileUtils.deleteQuietly(source); } return thumbNode != null; } protected void doAutodetect() { logger.info("Checking if the {} is present in the current path", executablePath); enabled = ProcessUtils.commandPresent(executablePath, workingDir); if (enabled) { logger.info("Found {} in the current system path." + " Service will be enabled.", executablePath); } else { logger.info("Command {} cannot be found in the current system path." + " The service will be disabled.", executablePath); } } public boolean generateThumbnail(File videoFile, File outputFile, int offsetSeconds, String size) throws DocumentOperationException { if (!isEnabled()) { logger.info("FFmpeg service is not enabled." + " Skip converting file {}", videoFile); return false; } long timer = System.currentTimeMillis(); CommandLine cmd = getConvertCommandLine(videoFile, outputFile, String.valueOf(offsetSeconds), StringUtils.defaultIfEmpty(size, "320x240")); if (logger.isDebugEnabled()) { logger.debug("Execuiting thumbnail generation command: {}", cmd.toString()); } int exitValue = 0; StringOutputStream err = new StringOutputStream(); try { DefaultExecutor executor = new DefaultExecutor(); executor.setStreamHandler(new PumpStreamHandler(null, err)); if (workingDir != null) { if (workingDir.exists() || workingDir.mkdirs()) { executor.setWorkingDirectory(workingDir); } } exitValue = executor.execute(cmd, System.getenv()); } catch (Exception e) { throw new DocumentOperationException(e); } finally { if (exitValue > 0 && err.getLength() > 0) { logger.error("External process finished with error. Cause: {}", err.toString()); } if (logger.isDebugEnabled() && err.getLength() > 0) { logger.debug(err.toString()); } } if (logger.isDebugEnabled()) { logger.debug("Generating thumbnail {} from {} done (exit code: {}) in {} ms", new Object[] { outputFile, videoFile, exitValue, (System.currentTimeMillis() - timer) }); } return exitValue == 0; } public File generateThumbnail(File videoFile, int offsetSeconds, String size) throws DocumentOperationException { if (!isEnabled()) { logger.info("FFmpeg service is not enabled." + " Skip converting file {}", videoFile); return null; } File out = null; try { out = File.createTempFile("video-thumbnail", null); generateThumbnail(videoFile, out, offsetSeconds, size); } catch (DocumentOperationException e) { FileUtils.deleteQuietly(out); throw e; } catch (IOException e) { FileUtils.deleteQuietly(out); logger.error("Unable to create a temp file for video thumbnail generation operation. Cause: " + e.getMessage(), e); } return out; } protected CommandLine getConvertCommandLine(File inputFile, File outputFile, String offset, String size) { CommandLine cmd = new CommandLine(executablePath); cmd.addArguments(parameters); Map<String, Object> params = new HashMap<String, Object>(4); params.put("offset", offset); params.put("input", inputFile); params.put("output", outputFile); params.put("size", size); cmd.setSubstitutionMap(params); return cmd; } public boolean isEnabled() { return enabled; } /** * Enables or disables the conversion service * * @param activate * set to <code>true</code> to enable the service; to <code>false</code> to disable it and to <code>auto</code> to * auto-detect if the executable is present in the path and than enable the service. */ public void setActivate(String activate) { activate = activate != null ? activate.trim() : activate; this.enabled = Boolean.valueOf(activate); if (!this.enabled && activate != null) { this.autodetect = "auto".equalsIgnoreCase(activate) || "autodetect".equalsIgnoreCase(activate); } } public void setExecutablePath(String executablePath) { this.executablePath = executablePath; } public void setParameters(String parameters) { this.parameters = parameters; } public void setWorkingDir(File workingDir) { this.workingDir = workingDir; } protected JCRNodeWrapper storeThumbnailNode(JCRNodeWrapper fileNode, File thumbnail, String thumbnailName) throws RepositoryException, IOException { JCRNodeWrapper node = null; fileNode.getSession().checkout(fileNode); try { node = fileNode.getNode(thumbnailName); } catch (PathNotFoundException e) { node = fileNode.addNode(thumbnailName, Constants.JAHIANT_RESOURCE); node.addMixin(Constants.JAHIAMIX_IMAGE); } if (node.hasProperty(Constants.JCR_DATA)) { node.getProperty(Constants.JCR_DATA).remove(); } Binary b = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(thumbnail)); b = new BinaryImpl(is); node.setProperty(Constants.JCR_DATA, b); } finally { if (b != null) { b.dispose(); } IOUtils.closeQuietly(is); } node.setProperty(Constants.JCR_MIMETYPE, "image/jpeg"); Calendar lastModified = Calendar.getInstance(); node.setProperty(Constants.JCR_LASTMODIFIED, lastModified); fileNode.setProperty(Constants.JCR_LASTMODIFIED, lastModified); return node; } }