/*
* 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 lineage2.loginserver;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Map;
import java.util.TreeMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import lineage2.commons.dbutils.DbUtils;
import lineage2.loginserver.database.L2DatabaseFactory;
import lineage2.loginserver.gameservercon.GameServer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Mobius
* @version $Revision: 1.0 $
*/
public class GameServerManager
{
/**
* Field _log.
*/
private static Logger _log = LoggerFactory.getLogger(GameServerManager.class);
/**
* Field _instance.
*/
private static final GameServerManager _instance = new GameServerManager();
/**
* Method getInstance.
* @return GameServerManager
*/
public static final GameServerManager getInstance()
{
return _instance;
}
/**
* Field _gameServers.
*/
private final Map<Integer, GameServer> _gameServers = new TreeMap<>();
/**
* Field _lock.
*/
private final ReadWriteLock _lock = new ReentrantReadWriteLock();
/**
* Field _readLock.
*/
private final Lock _readLock = _lock.readLock();
/**
* Field _writeLock.
*/
private final Lock _writeLock = _lock.writeLock();
/**
* Constructor for GameServerManager.
*/
public GameServerManager()
{
load();
_log.info("Loaded " + _gameServers.size() + " registered GameServer(s).");
}
/**
* Method load.
*/
private void load()
{
Connection con = null;
PreparedStatement statement = null;
ResultSet rset = null;
try
{
con = L2DatabaseFactory.getInstance().getConnection();
statement = con.prepareStatement("SELECT server_id FROM gameservers");
rset = statement.executeQuery();
int id;
while (rset.next())
{
id = rset.getInt("server_id");
GameServer gs = new GameServer(id);
_gameServers.put(id, gs);
}
}
catch (Exception e)
{
_log.error("", e);
}
finally
{
DbUtils.closeQuietly(con, statement, rset);
}
}
/**
* Method getGameServers.
* @return GameServer[]
*/
public GameServer[] getGameServers()
{
_readLock.lock();
try
{
return _gameServers.values().toArray(new GameServer[_gameServers.size()]);
}
finally
{
_readLock.unlock();
}
}
/**
* Method getGameServerById.
* @param id int
* @return GameServer
*/
public GameServer getGameServerById(int id)
{
_readLock.lock();
try
{
return _gameServers.get(id);
}
finally
{
_readLock.unlock();
}
}
/**
* Method registerGameServer.
* @param gs GameServer
* @return boolean
*/
public boolean registerGameServer(GameServer gs)
{
if (!Config.ACCEPT_NEW_GAMESERVER)
{
return false;
}
_writeLock.lock();
try
{
int id = 1;
while (id++ > 0)
{
GameServer pgs = _gameServers.get(id);
if ((pgs == null) || !pgs.isAuthed())
{
_gameServers.put(id, gs);
gs.setId(id);
return true;
}
}
}
finally
{
_writeLock.unlock();
}
return false;
}
/**
* Method registerGameServer.
* @param id int
* @param gs GameServer
* @return boolean
*/
public boolean registerGameServer(int id, GameServer gs)
{
_writeLock.lock();
try
{
GameServer pgs = _gameServers.get(id);
if (!Config.ACCEPT_NEW_GAMESERVER && (pgs == null))
{
return false;
}
if ((pgs == null) || !pgs.isAuthed())
{
_gameServers.put(id, gs);
gs.setId(id);
return true;
}
}
finally
{
_writeLock.unlock();
}
return false;
}
}