Java tutorial
/* This softtware use BSD licence (http://opensource.org/licenses/BSD-3-Clause) Copyright (c) 2013, Martin Lebeda All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the Martin Lebeda nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.collections.Predicate; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOCase; import org.apache.commons.io.filefilter.FileFilterUtils; import org.apache.commons.io.filefilter.IOFileFilter; import org.apache.commons.io.filefilter.WildcardFileFilter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * @author <a href="mailto:martin.lebeda@gmail.com">Martin Lebeda</a> * Date: 10.11.13 */ public class BackupService { final Logger logger = LoggerFactory.getLogger(BackupService.class); private String idBackup; private Repository repository; private List<String> pathToBackupList; private List<String> excludes; private List<String> excludeDirs; private VOConfig cfg = null; private VOBackupSumary sumary = new VOBackupSumary(); /** * Create object who provided backup. * * @param cfg configuration provider * @param repository reporitory provider */ public BackupService(VOConfig cfg, Repository repository) { this.cfg = cfg; this.idBackup = cfg.getBackup(); this.repository = repository; this.pathToBackupList = cfg.getPaths(); this.excludes = cfg.getExclude(); this.excludeDirs = cfg.getExcludedir(); } /** * Main method to start backup action. * * @return Index ID of backup (technicaly name of create index file) * @throws Exception */ public String run() throws Exception { logger.info("Backup started for '{}', to repository '{}'", idBackup, repository.getFullPath()); Set<VOBackupFile> oldFileSet = repository.getOldBackupIndex(idBackup); logger.info("Found {} files in old indexes.", oldFileSet.size()); Map<VOBackupFile, VOBackupFile> oldFileIndex = new HashMap<>(oldFileSet.size()); for (VOBackupFile voBackupFile : oldFileSet) { oldFileIndex.put(voBackupFile, voBackupFile); } logger.trace("Index prepared"); // explore source paths List<VOBackupFile> newFileList = exploreBackupFiles(); sumary.setFounded(newFileList.size()); logger.trace("finding directories."); sumary.setDirs(CollectionUtils.select(newFileList, new Predicate() { @Override public boolean evaluate(Object object) { return (((VOBackupFile) object).isDirectory()); } }).size()); logger.trace("finding empty files."); sumary.setEmptyFiles(CollectionUtils.select(newFileList, new Predicate() { @Override public boolean evaluate(Object object) { return (((VOBackupFile) object).getSize() == 0) && !((VOBackupFile) object).isDirectory(); } }).size()); logger.trace("start comparing."); // find unchanged items int cnt = 0; for (VOBackupFile voBackupFile : newFileList) { if (voBackupFile.unPrepared() && oldFileIndex.containsKey(voBackupFile)) { VOBackupFile voBackupFileOld = oldFileIndex.get(voBackupFile); // (VOBackupFile) CollectionUtils.find(oldFileSet, PredicateUtils.equalPredicate(voBackupFile)); if (voBackupFileOld != null) { voBackupFile.setFileHash(voBackupFileOld.getFileHash()); voBackupFile.setCheckSumBck(voBackupFileOld.getCheckSumBck()); cnt++; } else { logger.trace("Wrog finding old object."); } } } sumary.setNonChanged(cnt); logger.info("Found {} unchanged files.", cnt); // for unprepared items do backup cnt = 0; for (VOBackupFile voBackupFile : newFileList) { if (voBackupFile.unPrepared()) { try { repository.saveContentToRepo(voBackupFile, oldFileSet); cnt++; } catch (Exception e) { sumary.getErrors().add(voBackupFile.getPath() + " - " + e.getMessage()); logger.error("Unable to backup " + voBackupFile.getPath() + ": ", e); } } } sumary.setProcessed(cnt); logger.info("Processed {} changed or new files.", cnt); // store index in repository meta VOBackupIndex backupIndex = new VOBackupIndex(newFileList); backupIndex.setConfig(cfg); backupIndex.setSummary(sumary); // check before save VOCheckIndex voCheckIndex = repository.checkIndex(backupIndex, false, false); if (voCheckIndex.allOk()) { logger.info("check index: OK"); } else { logger.error("check index: {}", voCheckIndex.toString()); } backupIndex.setCheck(voCheckIndex); String indexFileName = repository.saveBackupIndex(backupIndex, idBackup); logger.info(sumary.toString()); logger.info("Backup ended"); return indexFileName; } /** * Explore path on local system and identify files to backup. * It takes into account filters of excluded files and directories. * * @return list of local files and directories to backup */ private List<VOBackupFile> exploreBackupFiles() { List<VOBackupFile> newFileList = new ArrayList<>(); for (String pathForBackup : pathToBackupList) { logger.info("start explore source path '{}' for backup.", pathForBackup); IOFileFilter symlinkFilter = new IOFileFilter() { @Override public boolean accept(final File file) { try { final File parentFile = file.getParentFile(); final boolean symlink = FileUtils.isSymlink(parentFile); return !symlink; } catch (IOException e) { e.printStackTrace(); //TODO Lebeda - oetit } return false; } @Override public boolean accept(final File dir, final String name) { try { return !FileUtils.isSymlink(dir.getParentFile()); } catch (IOException e) { e.printStackTrace(); //TODO Lebeda - oetit } return false; } }; // http://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/filefilter/WildcardFileFilter.html IOFileFilter fileFilter = FileFilterUtils.and(symlinkFilter, getWildcardsFilter(excludes)); IOFileFilter dirFilter = FileFilterUtils.and(symlinkFilter, getWildcardsFilter(excludeDirs)); //noinspection unchecked final Collection<File> fileColection = FileUtils.listFilesAndDirs(new File(pathForBackup), fileFilter, dirFilter); for (File file : fileColection) { newFileList.add(new VOBackupFile(file)); } logger.info("end of explore source path '{}'.", pathForBackup); } logger.info("end of explore all source paths, found {} items.", newFileList.size()); return newFileList; } /** * Create filter for finding files. Compile one filter using or operator. * <p/> * Example: list of texts: *.bak, *.o -> object repsents: *.bak or *.o * * @param excludes list of user defined wildcard filters * * @return It takes into account lists */ private IOFileFilter getWildcardsFilter(List<String> excludes) { IOFileFilter result; if (CollectionUtils.isNotEmpty(excludes)) { List<IOFileFilter> fileFilterList = new ArrayList<>(excludes.size()); for (String exclude : excludes) { fileFilterList.add(new WildcardFileFilter(exclude, IOCase.SYSTEM)); } //noinspection SuspiciousToArrayCall final IOFileFilter orFiler = FileFilterUtils .or(fileFilterList.toArray(new WildcardFileFilter[excludes.size()])); result = FileFilterUtils.notFileFilter(orFiler); } else { result = FileFilterUtils.trueFileFilter(); } return result; } }