Java tutorial
/* * Copyright (C) 2014-2016 Andrea Feccomandi * * Licensed under the terms of GNU GPL License; * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.gnu.org/licenses/gpl-2.0.html * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY. * See the GNU General Public License for more details. * */ package com.bibisco.manager; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import java.util.UUID; import org.apache.commons.io.FilenameUtils; import org.apache.commons.lang.Validate; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import com.bibisco.BibiscoException; import com.bibisco.bean.ImageDTO; import com.bibisco.dao.SqlSessionFactoryManager; import com.bibisco.dao.client.ImagesMapper; import com.bibisco.dao.model.Images; import com.bibisco.dao.model.ImagesExample; import com.bibisco.enums.ElementType; import com.bibisco.log.Log; /** * Image manager. * * @author Andrea Feccomandi * */ public class ImageManager { private static Log mLog = Log.getInstance(ImageManager.class); public static ImageDTO insert(ImageDTO pImageDTO) { mLog.debug("Start insert(ImageDTO)"); // validate preconditions Validate.notNull(pImageDTO, "argument ImageDTO cannot be null"); Validate.notNull(pImageDTO.getIdElement(), "argument ImageDTO.idElement cannot be null"); Validate.notNull(pImageDTO.getElementType(), "argument ImageDTO.elementType cannot be null"); Validate.notNull(pImageDTO.getInputStream(), "argument ImageDTO.inputStream cannot be null"); Validate.notEmpty(pImageDTO.getSourceFileName(), "argument ImageDTO.sourceFileName cannot be empty"); Validate.notEmpty(pImageDTO.getDescription(), "argument ImageDTO.description cannot be empty"); SqlSessionFactory lSqlSessionFactory = SqlSessionFactoryManager.getInstance().getSqlSessionFactoryProject(); SqlSession lSqlSession = lSqlSessionFactory.openSession(); try { // write file to file system String lStrFileName = writeFile(pImageDTO); Images lImages = new Images(); lImages.setDescription(pImageDTO.getDescription()); lImages.setIdElement(pImageDTO.getIdElement()); lImages.setElementType(pImageDTO.getElementType().getValue()); lImages.setFileName(lStrFileName); ImagesMapper lImagesMapper = lSqlSession.getMapper(ImagesMapper.class); lImagesMapper.insert(lImages); pImageDTO.setIdImage(lImages.getIdImage().intValue()); pImageDTO.setTargetFileName(lStrFileName); lSqlSession.commit(); } catch (Throwable t) { mLog.error(t); lSqlSession.rollback(); throw new BibiscoException(t, BibiscoException.SQL_EXCEPTION); } finally { lSqlSession.close(); } mLog.debug("Start insert(ImageDTO)"); return pImageDTO; } private static String writeFile(ImageDTO pImageDTO) { String lStrFileName = null; mLog.debug("Start writeFile(ImageDTO)"); String lStrFileItemFileName = pImageDTO.getSourceFileName(); // build file name StringBuilder lStringBuilderFileName = new StringBuilder(); lStringBuilderFileName.append(UUID.randomUUID().toString()); lStringBuilderFileName.append("."); lStringBuilderFileName.append(FilenameUtils.getExtension(lStrFileItemFileName)); lStrFileName = lStringBuilderFileName.toString(); // get file path String lStrFilePath = getFilePath(lStrFileName); // write file to disk InputStream lInputStream = pImageDTO.getInputStream(); try { File lFile = new File(lStrFilePath); FileOutputStream lFileOutputStream = new FileOutputStream(lFile); int lIntRead = 0; byte[] lBytes = new byte[1024]; while ((lIntRead = lInputStream.read(lBytes)) != -1) { lFileOutputStream.write(lBytes, 0, lIntRead); } lInputStream.close(); lFileOutputStream.close(); } catch (Throwable t) { mLog.error(t, "insert() Error writing file: lFile=" + pImageDTO.getSourceFileName()); throw new BibiscoException(BibiscoException.IO_EXCEPTION); } mLog.debug("End writeFile(ImageDTO): return ", lStrFileName); return lStrFileName; } private static String getFilePath(String pStrFileName) { // build file path StringBuilder lStringBuilderFilePath = new StringBuilder(); lStringBuilderFilePath .append(ProjectManager.getDBProjectDirectory(ContextManager.getInstance().getIdProject())); lStringBuilderFilePath.append(System.getProperty("file.separator")); lStringBuilderFilePath.append(pStrFileName); String lStrFilePath = lStringBuilderFilePath.toString(); return lStrFilePath; } private static void deleteFile(String pStrFileName) { mLog.debug("Start deleteFile(" + pStrFileName + ")"); // get file path String lStrFilePath = getFilePath(pStrFileName); // delete file File lFile = new File(lStrFilePath); lFile.delete(); mLog.debug("End deleteFile(" + pStrFileName + ")"); } public static String load(Integer pIntIdImage) { String lStrFileName = null; mLog.debug("Start load(ImageDTO)"); // validate preconditions Validate.notNull(pIntIdImage, "argument idImage cannot be null"); SqlSessionFactory lSqlSessionFactory = SqlSessionFactoryManager.getInstance().getSqlSessionFactoryProject(); SqlSession lSqlSession = lSqlSessionFactory.openSession(); try { ImagesMapper lImagesMapper = lSqlSession.getMapper(ImagesMapper.class); Images lImages = lImagesMapper.selectByPrimaryKey(pIntIdImage.longValue()); if (lImages != null) { lStrFileName = lImages.getFileName(); } } catch (Throwable t) { mLog.error(t); throw new BibiscoException(t, BibiscoException.SQL_EXCEPTION); } finally { lSqlSession.close(); } mLog.debug("End load(ImageDTO)"); return lStrFileName; } public static List<ImageDTO> loadImagesByElement(Integer pIntIdElement, ElementType pElementType) { List<ImageDTO> lListImageDTO = new ArrayList<ImageDTO>(); mLog.debug("Start loadImagesByElement(Integer, ElementType"); // validate preconditions Validate.notNull(pIntIdElement, "argument idElement cannot be null"); Validate.notNull(pElementType, "argument ElementType cannot be null"); SqlSessionFactory lSqlSessionFactory = SqlSessionFactoryManager.getInstance().getSqlSessionFactoryProject(); SqlSession lSqlSession = lSqlSessionFactory.openSession(); try { ImagesExample lImagesExample = new ImagesExample(); lImagesExample.createCriteria().andIdElementEqualTo(pIntIdElement) .andElementTypeEqualTo(pElementType.getValue()); lImagesExample.setOrderByClause("id_image"); ImagesMapper lImagesMapper = lSqlSession.getMapper(ImagesMapper.class); List<Images> lListImages = lImagesMapper.selectByExample(lImagesExample); for (Images lImages : lListImages) { ImageDTO lImageDTO = new ImageDTO(); lImageDTO.setIdImage(lImages.getIdImage().intValue()); lImageDTO.setDescription(lImages.getDescription()); lImageDTO.setElementType(pElementType); lImageDTO.setIdElement(pIntIdElement); lListImageDTO.add(lImageDTO); } } catch (Throwable t) { mLog.error(t); throw new BibiscoException(t, BibiscoException.SQL_EXCEPTION); } finally { lSqlSession.close(); } mLog.debug("End loadImagesByElement(ImageDTO"); return lListImageDTO; } public static void delete(Integer pIntIdImage) { mLog.debug("Start delete(Integer)"); // validate preconditions Validate.notNull(pIntIdImage, "argument idImage cannot be null"); SqlSessionFactory lSqlSessionFactory = SqlSessionFactoryManager.getInstance().getSqlSessionFactoryProject(); SqlSession lSqlSession = lSqlSessionFactory.openSession(); try { ImagesMapper lImagesMapper = lSqlSession.getMapper(ImagesMapper.class); // load image to delete Images lImages = lImagesMapper.selectByPrimaryKey(pIntIdImage.longValue()); if (lImages != null) { // delete image file on disk deleteFile(lImages.getFileName()); // delete image on db lImagesMapper.deleteByPrimaryKey(pIntIdImage.longValue()); lSqlSession.commit(); } } catch (Throwable t) { mLog.error(t); lSqlSession.rollback(); throw new BibiscoException(t, BibiscoException.SQL_EXCEPTION); } finally { lSqlSession.close(); } mLog.debug("End delete(Integer)"); } public static void deleteImagesByElement(SqlSession pSqlSession, Integer pIntIdElement, ElementType pElementType) { mLog.debug("Start deleteImagesByElement(SqlSession, Integer, ElementType)"); // validate preconditions Validate.notNull(pSqlSession, "argument SqlSession cannot be null"); Validate.notNull(pIntIdElement, "argument idElement cannot be null"); Validate.notNull(pElementType, "argument ElementType cannot be null"); try { ImagesExample lImagesExample = new ImagesExample(); lImagesExample.createCriteria().andIdElementEqualTo(pIntIdElement) .andElementTypeEqualTo(pElementType.getValue()); ImagesMapper lImagesMapper = pSqlSession.getMapper(ImagesMapper.class); // load images to delete List<Images> lListImages = lImagesMapper.selectByExample(lImagesExample); // delete image files on disk for (Images lImages : lListImages) { deleteFile(lImages.getFileName()); } // delete images on db lImagesMapper.deleteByExample(lImagesExample); } catch (Throwable t) { mLog.error(t); throw new BibiscoException(t, BibiscoException.SQL_EXCEPTION); } mLog.debug("End deleteImagesByElement(SqlSession, Integer, ElementType)"); } }