136 lines
4.3 KiB
Java
136 lines
4.3 KiB
Java
/*
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* This file is part of the L2J Mobius project.
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*
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* This program 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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* This program 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.l2jmobius.commons.database;
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import java.beans.PropertyVetoException;
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import java.sql.Connection;
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import java.sql.SQLException;
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import java.util.logging.Logger;
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import com.l2jmobius.Config;
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import com.mchange.v2.c3p0.ComboPooledDataSource;
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/**
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* Database Factory implementation.
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* @author Zoey76
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*/
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public class DatabaseFactory
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{
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private static final Logger _log = Logger.getLogger(DatabaseFactory.class.getName());
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private final ComboPooledDataSource _dataSource;
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public DatabaseFactory()
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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 2 connections are required.");
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}
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_dataSource = new ComboPooledDataSource();
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_dataSource.setAutoCommitOnClose(true);
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_dataSource.setInitialPoolSize(10);
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_dataSource.setMinPoolSize(10);
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_dataSource.setMaxPoolSize(Math.max(10, Config.DATABASE_MAX_CONNECTIONS));
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_dataSource.setAcquireRetryAttempts(0); // try to obtain connections indefinitely (0 = never quit)
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_dataSource.setAcquireRetryDelay(500); // 500 milliseconds wait before try to acquire connection again
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_dataSource.setCheckoutTimeout(0); // 0 = wait indefinitely for new connection if pool is exhausted
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_dataSource.setAcquireIncrement(5); // if pool is exhausted, get 5 more connections at a time cause there is
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// a "long" delay on acquire connection so taking more than one connection at once will make connection pooling more effective.
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// this "connection_test_table" is automatically created if not already there
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_dataSource.setAutomaticTestTable("connection_test_table");
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_dataSource.setTestConnectionOnCheckin(false);
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// testing OnCheckin used with IdleConnectionTestPeriod is faster than testing on checkout
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_dataSource.setIdleConnectionTestPeriod(3600); // test idle connection every 60 sec
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_dataSource.setMaxIdleTime(Config.DATABASE_MAX_IDLE_TIME); // 0 = idle connections never expire
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// *THANKS* to connection testing configured above but I prefer to disconnect all connections not used 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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_dataSource.setMaxStatementsPerConnection(100);
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_dataSource.setBreakAfterAcquireFailure(false); // never fail if any way possible setting this to true will make c3p0 "crash"
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// and refuse to work till restart thus making acquire errors "FATAL" ... we don't want that it should be possible to recover
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try
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{
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_dataSource.setDriverClass(Config.DATABASE_DRIVER);
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}
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catch (PropertyVetoException e)
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{
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e.printStackTrace();
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}
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_dataSource.setJdbcUrl(Config.DATABASE_URL);
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_dataSource.setUser(Config.DATABASE_LOGIN);
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_dataSource.setPassword(Config.DATABASE_PASSWORD);
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/* Test the connection */
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try
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{
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_dataSource.getConnection().close();
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}
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catch (SQLException e)
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{
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e.printStackTrace();
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}
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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 = _dataSource.getConnection();
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}
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catch (SQLException e)
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{
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_log.warning(getClass().getSimpleName() + ": Unable to get a connection: " + e.getMessage());
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}
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}
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return con;
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}
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public void close()
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{
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try
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{
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_dataSource.close();
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}
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catch (Exception e)
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{
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_log.info(e.getMessage());
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}
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}
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public static DatabaseFactory getInstance()
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{
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return SingletonHolder.INSTANCE;
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}
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private static class SingletonHolder
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{
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protected static final DatabaseFactory INSTANCE = new DatabaseFactory();
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}
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}
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