com.mmounirou.spotirss.spotify.tracks.TrackCache.java Source code

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Here is the source code for com.mmounirou.spotirss.spotify.tracks.TrackCache.java

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/*
 * Copyright (C) 2011 Mohamed MOUNIROU
 *
 * 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.
 */
package com.mmounirou.spotirss.spotify.tracks;

import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Date;
import java.util.List;
import java.util.Map;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.time.DateUtils;

import com.google.common.base.Charsets;
import com.google.common.base.Joiner;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.google.common.io.Files;
import com.mmounirou.spotirss.rss.Track;

public class TrackCache implements Closeable {
    private Map<Track, String> m_cache = Maps.newHashMap();
    private OutputStreamWriter stream;

    public TrackCache() throws IOException {
        File cacheDir = new File(FileUtils.getTempDirectory(), "spotify");
        cacheDir.mkdirs();
        File cacheFile = new File(cacheDir, "hrefCache");
        if (FileUtils.isFileOlder(cacheFile, DateUtils.addDays(new Date(), -1))) {
            cacheFile.delete();
            System.out.println("Delete cache ..." + cacheFile.getAbsolutePath());
        }

        if (cacheFile.exists()) {
            System.out.println("load cache ..." + cacheFile.getAbsolutePath());
            List<String> strExtendedTracks = Files.readLines(cacheFile, Charsets.UTF_8);
            for (String strExtendedTrack : strExtendedTracks) {
                String[] extendedTrackSplitted = strExtendedTrack.split(",");
                String m_artist = extendedTrackSplitted[0];
                String m_song = extendedTrackSplitted[1];
                String m_href = extendedTrackSplitted[2];
                Track track = new Track(Sets.newHashSet(m_artist.split("&")), m_song);
                m_cache.put(track, m_href);
            }
        }

        stream = Files.newWriterSupplier(cacheFile, Charsets.UTF_8, true).getOutput();
    }

    public String get(Track track) {
        return m_cache.get(track);
    }

    public void put(Track track, String strHref) {
        m_cache.put(track, strHref);
        try {
            stream.write(
                    String.format("%s,%s,%s\n", Joiner.on("&").join(track.getArtists()), track.getSong(), strHref));
        } catch (IOException e) {
            // just a try write
        }
    }

    @Override
    public void close() throws IOException {
        stream.close();
    }

}