/*
* Jajuk
* Copyright (C) The Jajuk Team
* http://jajuk.info
*
* 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
package org.jajuk.services.players;
import java.util.HashSet;
import java.util.Set;
import org.jajuk.events.JajukEvent;
import org.jajuk.events.JajukEvents;
import org.jajuk.events.ObservationManager;
import org.jajuk.events.Observer;
/**
* FIFO convenient facilities <singleton>.
*/
public final class QueueController implements Observer {
private static QueueController self = new QueueController();
// Register this item, do not do this in the constructor as the instance is not yet available
static {
ObservationManager.register(self);
}
/**
* Gets the single instance of QueueController.
*
* @return single instance of QueueController
*/
public static QueueController getInstance() {
return self;
}
/*
* (non-Javadoc)
*
* @see org.jajuk.events.Observer#getRegistrationKeys()
*/
@Override
public Set<JajukEvents> getRegistrationKeys() {
Set<JajukEvents> keys = new HashSet<JajukEvents>();
keys.add(JajukEvents.DEVICE_REFRESH);
return keys;
}
/*
* (non-Javadoc)
*
* @see org.jajuk.events.Observer#update(org.jajuk.events.Event)
*/
@Override
public void update(JajukEvent event) {
JajukEvents subject = event.getSubject();
// In case of device refresh, we force fifo cleanup, for ie to remove
// deleted files
if (JajukEvents.DEVICE_REFRESH.equals(subject)) {
QueueModel.clean();
}
}
}