org.messic.server.api.APIRandomLists.java Source code

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Here is the source code for org.messic.server.api.APIRandomLists.java

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/*
 * Copyright (C) 2013
 *
 *  This file is part of Messic.
 * 
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 */
package org.messic.server.api;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

import org.apache.log4j.Logger;
import org.messic.server.api.datamodel.RandomList;
import org.messic.server.api.datamodel.User;
import org.messic.server.api.randomlists.RandomListPlugin;
import org.messic.server.datamodel.dao.DAOAuthor;
import org.messic.server.datamodel.dao.DAOSong;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

@Transactional
@Component
public class APIRandomLists {
    @Autowired
    private DAOSong daoSong;

    @Autowired
    private DAOAuthor daoAuthor;

    @Autowired
    private RandomListPlugin[] plugins;

    private static final Logger log = Logger.getLogger(APIRandomLists.class);

    @Transactional
    public RandomList getList(User user, String name) {
        for (int i = 0; i < plugins.length; i++) {
            RandomListPlugin rlp = plugins[i];
            RandomList rl = rlp.getRandomList(user);
            if (rl != null && rl.getSongs().size() > 0) {
                if (rl.getName().equalsIgnoreCase(name)) {
                    return rl;
                }
            }
        }

        return null;
    }

    @Transactional
    public List<RandomList> getAllLists(User user) {
        ArrayList<RandomList> result = new ArrayList<RandomList>();

        // we will get only 4 lists as maximum, each time different ones... so lets shuffle the lists
        long seed = System.nanoTime();
        ArrayList<RandomListPlugin> lplugins = new ArrayList<RandomListPlugin>();
        for (int i = 0; i < plugins.length; i++) {
            lplugins.add(plugins[i]);
        }
        Collections.shuffle(lplugins, new Random(seed));

        for (int i = 0; i < lplugins.size() && i < 4; i++) {
            long start = System.currentTimeMillis();

            RandomListPlugin rlp = lplugins.get(i);
            RandomList rl = rlp.getRandomList(user);
            if (rl != null && rl.getSongs().size() > 0) {
                result.add(rl);
            }

            long end = System.currentTimeMillis();

            log.debug("(" + ((end - start)) + "ms)-Timing obtaining info from plugin:" + rlp.getName());
        }

        return result;
    }
}