Java tutorial
/* * The MIT License * * Copyright 2014 Anton, Carl, John, Peter. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package edu.chalmers.dat076.moviefinder.service; import edu.chalmers.dat076.moviefinder.model.TemporaryMedia; import edu.chalmers.dat076.moviefinder.model.TraktEpisodeResponse; import edu.chalmers.dat076.moviefinder.model.TraktMovieResponse; import edu.chalmers.dat076.moviefinder.model.TraktResponse; import edu.chalmers.dat076.moviefinder.model.TraktShowResponse; import edu.chalmers.dat076.moviefinder.persistence.Episode; import edu.chalmers.dat076.moviefinder.persistence.EpisodeRepository; import edu.chalmers.dat076.moviefinder.persistence.Movie; import edu.chalmers.dat076.moviefinder.persistence.MovieRepository; import edu.chalmers.dat076.moviefinder.persistence.Series; import edu.chalmers.dat076.moviefinder.persistence.SeriesRepository; import java.io.File; import java.nio.file.Path; import java.util.HashMap; import java.util.List; import java.util.concurrent.Semaphore; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.dao.DataIntegrityViolationException; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; /** * A service for saving and removing files from the database. New files are * looked up via a third party media API to try and get information about them. * * @author Peter */ @Service public class MovieFileDatabaseHandlerImpl implements MovieFileDatabaseHandler { @Autowired private MovieRepository movieRepository; @Autowired private SeriesRepository seriesRepository; @Autowired private EpisodeRepository episodeRepository; private final Semaphore lock = new Semaphore(300); private final HashMap<String, Semaphore> serieLock = new HashMap<>(); private final Semaphore movieSemaphore = new Semaphore(1, true); @Override public void saveFile(final Path path) { Runnable r = new Runnable() { @Override @Transactional public void run() { try { TemporaryMedia temporaryMedia = new TitleParser().parseMedia(path.getFileName().toString()); TraktResponse traktData = new TraktHandler().getByTmpMedia(temporaryMedia); if (traktData != null) { if (traktData instanceof TraktMovieResponse) { Movie movie = new Movie(path.toString(), traktData); try { try { movieSemaphore.acquire(); } catch (InterruptedException ex) { } movieRepository.save(movie); } catch (DataIntegrityViolationException e) { } finally { movieSemaphore.release(); } } else { TraktEpisodeResponse epr = (TraktEpisodeResponse) traktData; Semaphore sLock = serieLock.get(epr.getShow().getTitle()); if (sLock == null) { sLock = new Semaphore(1, true); serieLock.put(epr.getShow().getTitle(), sLock); } try { sLock.acquire(); Series s = seriesRepository.findByImdbId(epr.getShow().getImdbId()); if (s == null) { TraktShowResponse sr = new TraktHandler() .getByShowName(temporaryMedia.getName()); if (sr != null) { s = new Series(sr); seriesRepository.save(s); } } if (s != null) { Episode ep = new Episode(path.toString(), traktData, s); episodeRepository.save(ep); } } catch (InterruptedException ex) { } finally { sLock.release(); } } } } finally { lock.release(); } } }; try { lock.acquire(); } catch (InterruptedException ex) { } new Thread(r).start(); } @Override public void setPaths(List<Path> paths) { Iterable<Movie> movies = movieRepository.findAll(); Iterable<Episode> episodes = episodeRepository.findAll(); for (Movie m : movies) { boolean foundParent = false; for (Path p : paths) { if (m.getFilePath().startsWith(p.toString())) { foundParent = true; break; } } if (!foundParent) { removeFile(new File(m.getFilePath()).toPath()); } } for (Episode e : episodes) { boolean foundParent = false; for (Path p : paths) { if (e.getFilePath().startsWith(p.toString())) { foundParent = true; break; } } if (!foundParent) { removeFile(new File(e.getFilePath()).toPath()); } } } @Override @Transactional public void updateFiles(List<Path> paths, Path basePath) { List<Movie> movies = movieRepository.findAllByFilePathStartingWith(basePath.toString()); for (int j = 0; j < movies.size(); j++) { for (int i = 0; i < paths.size(); i++) { if (paths.get(i).toString().equals(movies.get(j).getFilePath())) { paths.remove(i); movies.remove(j); j--; break; } } } List<Episode> episodes = episodeRepository.findAllByFilePathStartingWith(basePath.toString()); for (int j = 0; j < movies.size(); j++) { for (int i = 0; i < paths.size(); i++) { if (paths.get(i).toString().equals(episodes.get(j).getFilePath())) { paths.remove(i); episodes.remove(j); j--; break; } } } for (Path p : paths) { saveFile(p); } for (Movie m : movies) { removeFile(new File(m.getFilePath()).toPath()); } for (Episode e : episodes) { removeFile(new File(e.getFilePath()).toPath()); } } @Override @Transactional public void removeFile(Path path) { try { movieSemaphore.acquire(); List<Movie> movies = movieRepository.findAllByFilePathStartingWith(path.toString()); for (Movie m : movies) { movieRepository.delete(m); } } catch (InterruptedException ex) { } finally { movieSemaphore.release(); } List<Episode> episodes = episodeRepository.findAllByFilePathStartingWith(path.toString()); for (Episode m : episodes) { Semaphore sLock = serieLock.get(m.getSeries().getTitle()); if (sLock == null) { sLock = new Semaphore(1, true); serieLock.put(m.getSeries().getTitle(), sLock); } try { sLock.acquire(); Series s = m.getSeries(); s.getEpisodes().remove(m); episodeRepository.delete(m); if (s.getEpisodes().isEmpty()) { seriesRepository.delete(s); } else { seriesRepository.save(s); } } catch (InterruptedException ex) { } finally { sLock.release(); } } } }