275 lines
7.3 KiB
Java
275 lines
7.3 KiB
Java
/*
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* Copyright (C) 2004-2015 L2J Server
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*
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* This file is part of L2J Server.
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*
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* L2J Server is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* L2J Server is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver;
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import java.sql.Connection;
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import java.sql.SQLException;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.TimeUnit;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import com.l2jserver.gameserver.ThreadPoolManager;
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import com.mchange.v2.c3p0.ComboPooledDataSource;
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/**
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* This class manages the database connections.
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*/
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public class L2DatabaseFactory
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{
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private static final Logger _log = Logger.getLogger(L2DatabaseFactory.class.getName());
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private static L2DatabaseFactory _instance;
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private static volatile ScheduledExecutorService _executor;
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private ComboPooledDataSource _source;
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/**
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* Instantiates a new l2 database factory.
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* @throws SQLException the SQL exception
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*/
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public L2DatabaseFactory() throws SQLException
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{
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try
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{
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if (Config.DATABASE_MAX_CONNECTIONS < 2)
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{
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Config.DATABASE_MAX_CONNECTIONS = 2;
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_log.warning("A minimum of " + Config.DATABASE_MAX_CONNECTIONS + " db connections are required.");
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}
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_source = new ComboPooledDataSource();
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_source.setAutoCommitOnClose(true);
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_source.setInitialPoolSize(10);
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_source.setMinPoolSize(10);
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_source.setMaxPoolSize(Math.max(10, Config.DATABASE_MAX_CONNECTIONS));
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_source.setAcquireRetryAttempts(0); // try to obtain connections indefinitely (0 = never quit)
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_source.setAcquireRetryDelay(500); // 500 milliseconds wait before try to acquire connection again
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_source.setCheckoutTimeout(0); // 0 = wait indefinitely for new connection
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// if pool is exhausted
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_source.setAcquireIncrement(5); // if pool is exhausted, get 5 more connections at a time
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// cause there is a "long" delay on acquire connection
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// so taking more than one connection at once will make connection pooling
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// more effective.
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// this "connection_test_table" is automatically created if not already there
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_source.setAutomaticTestTable("connection_test_table");
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_source.setTestConnectionOnCheckin(false);
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// testing OnCheckin used with IdleConnectionTestPeriod is faster than testing on checkout
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_source.setIdleConnectionTestPeriod(3600); // test idle connection every 60 sec
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_source.setMaxIdleTime(Config.DATABASE_MAX_IDLE_TIME); // 0 = idle connections never expire
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// *THANKS* to connection testing configured above
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// but I prefer to disconnect all connections not used
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// for more than 1 hour
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// enables statement caching, there is a "semi-bug" in c3p0 0.9.0 but in 0.9.0.2 and later it's fixed
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_source.setMaxStatementsPerConnection(100);
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_source.setBreakAfterAcquireFailure(false); // never fail if any way possible
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// setting this to true will make
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// c3p0 "crash" and refuse to work
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// till restart thus making acquire
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// errors "FATAL" ... we don't want that
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// it should be possible to recover
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_source.setDriverClass(Config.DATABASE_DRIVER);
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_source.setJdbcUrl(Config.DATABASE_URL);
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_source.setUser(Config.DATABASE_LOGIN);
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_source.setPassword(Config.DATABASE_PASSWORD);
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/* Test the connection */
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_source.getConnection().close();
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if (Config.DEBUG)
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{
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_log.fine("Database Connection Working");
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}
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}
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catch (SQLException x)
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{
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if (Config.DEBUG)
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{
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_log.fine("Database Connection FAILED");
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}
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// re-throw the exception
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throw x;
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}
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catch (Exception e)
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{
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if (Config.DEBUG)
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{
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_log.fine("Database Connection FAILED");
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}
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throw new SQLException("Could not init DB connection:" + e.getMessage());
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}
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}
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/**
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* Shutdown.
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*/
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public void shutdown()
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{
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try
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{
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_source.close();
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}
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catch (Exception e)
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{
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_log.log(Level.INFO, "", e);
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}
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try
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{
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_source = null;
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}
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catch (Exception e)
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{
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_log.log(Level.INFO, "", e);
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}
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}
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/**
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* Gets the single instance of L2DatabaseFactory.
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* @return single instance of L2DatabaseFactory
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* @throws SQLException the SQL exception
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*/
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public static L2DatabaseFactory getInstance() throws SQLException
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{
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synchronized (L2DatabaseFactory.class)
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{
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if (_instance == null)
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{
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_instance = new L2DatabaseFactory();
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}
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}
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return _instance;
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}
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/**
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* Gets the connection.
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* @return the connection
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*/
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public Connection getConnection()
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{
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Connection con = null;
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while (con == null)
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{
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try
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{
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con = _source.getConnection();
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if (Server.serverMode == Server.MODE_GAMESERVER)
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{
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ThreadPoolManager.getInstance().scheduleGeneral(new ConnectionCloser(con, new RuntimeException()), Config.CONNECTION_CLOSE_TIME);
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}
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else
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{
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getExecutor().schedule(new ConnectionCloser(con, new RuntimeException()), Config.CONNECTION_CLOSE_TIME, TimeUnit.MILLISECONDS);
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}
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}
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catch (SQLException e)
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{
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_log.log(Level.WARNING, "L2DatabaseFactory: getConnection() failed, trying again " + e.getMessage(), e);
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}
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}
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return con;
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}
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/**
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* The Class ConnectionCloser.
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*/
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private static class ConnectionCloser implements Runnable
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{
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private static final Logger _log = Logger.getLogger(ConnectionCloser.class.getName());
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/** The connection. */
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private final Connection c;
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/** The exception. */
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private final RuntimeException exp;
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/**
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* Instantiates a new connection closer.
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* @param con the con
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* @param e the e
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*/
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public ConnectionCloser(Connection con, RuntimeException e)
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{
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c = con;
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exp = e;
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}
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@Override
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public void run()
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{
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try
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{
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if (!c.isClosed())
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{
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_log.log(Level.WARNING, "Unclosed connection! Trace: " + exp.getStackTrace()[1], exp);
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}
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}
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catch (SQLException e)
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{
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_log.log(Level.WARNING, "", e);
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}
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}
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}
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/**
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* Gets the executor.
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* @return the executor
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*/
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private static ScheduledExecutorService getExecutor()
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{
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if (_executor == null)
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{
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synchronized (L2DatabaseFactory.class)
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{
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if (_executor == null)
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{
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_executor = Executors.newSingleThreadScheduledExecutor();
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}
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}
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}
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return _executor;
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}
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/**
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* Gets the busy connection count.
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* @return the busy connection count
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* @throws SQLException the SQL exception
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*/
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public int getBusyConnectionCount() throws SQLException
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{
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return _source.getNumBusyConnectionsDefaultUser();
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}
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/**
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* Gets the idle connection count.
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* @return the idle connection count
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* @throws SQLException the SQL exception
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*/
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public int getIdleConnectionCount() throws SQLException
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{
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return _source.getNumIdleConnectionsDefaultUser();
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}
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}
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