jforum example source code file (C3P0PooledConnection.java)

This example jforum source code file (C3P0PooledConnection.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - jforum tags/keywords

c3p0pooledconnection, combopooleddatasource, combopooleddatasource, connection, databaseexception, dbconnection, exception, exception, integer, jdbc, method, object, object, reflection, sql, string, string

The jforum C3P0PooledConnection.java source code

/*
 * Copyright (c) JForum Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * Created on 30/11/2005 17:07:51
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum;

import java.lang.reflect.Method;
import java.sql.Connection;

import net.jforum.exceptions.DatabaseException;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import com.mchange.v2.c3p0.DataSources;

/**
 * @author Rafael Steil
 * @version $Id: C3P0PooledConnection.java,v 1.7 2007/04/12 02:11:52 rafaelsteil Exp $
 */
public class C3P0PooledConnection extends DBConnection
{
	private ComboPooledDataSource ds;
	
	/**
	 * 
	 * @see net.jforum.DBConnection#init()
	 */
	public void init() throws Exception
	{
		this.ds = new ComboPooledDataSource();
		
		this.ds.setDriverClass(SystemGlobals.getValue(ConfigKeys.DATABASE_CONNECTION_DRIVER));
		this.ds.setJdbcUrl(SystemGlobals.getValue(ConfigKeys.DATABASE_CONNECTION_STRING));
		this.ds.setMinPoolSize(SystemGlobals.getIntValue(ConfigKeys.DATABASE_POOL_MIN));
		this.ds.setMaxPoolSize(SystemGlobals.getIntValue(ConfigKeys.DATABASE_POOL_MAX));
		this.ds.setIdleConnectionTestPeriod(SystemGlobals.getIntValue(ConfigKeys.DATABASE_PING_DELAY));
		
		this.extraParams();
	}
	
	private void extraParams()
	{
		String extra = SystemGlobals.getValue(ConfigKeys.C3P0_EXTRA_PARAMS);
		
		if (extra != null && extra.trim().length() > 0) {
			String[] p = extra.split(";");
			
			for (int i = 0; i < p.length; i++) {
				String[] kv = p[i].trim().split("=");
				
				if (kv.length == 2) {
					this.invokeSetter(kv[0], kv[1]);
				}
			}
		}
	}
	
	/**
	 * Huge hack to invoke methods without the need of an external configuration file
	 * and whithout knowing the argument's type
	 */
	private void invokeSetter(String propertyName, String value)
	{
		try {
			String setter = "set" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);
			
			Method[] methods = this.ds.getClass().getMethods();
			
			for (int i = 0; i < methods.length; i++) {
				Method method = methods[i];
				
				if (method.getName().equals(setter)) {
					Class[] paramTypes = method.getParameterTypes();
					
					if (paramTypes[0] == String.class) {
						method.invoke(this.ds, new Object[] { value });
					}
					else if (paramTypes[0] == int.class) {
						method.invoke(this.ds, new Object[] { new Integer(value) });
					}
					else if (paramTypes[0] == boolean.class) {
						method.invoke(this.ds, new Object[] { Boolean.valueOf(value) });
					}
				}
			}
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * @see net.jforum.DBConnection#getConnection()
	 */
	public Connection getConnection()
	{
		try {
			return this.ds.getConnection();
		}
		catch (Exception e) {
			throw new DatabaseException(e);
		}
	}

	/**
	 * @see net.jforum.DBConnection#releaseConnection(java.sql.Connection)
	 */
	public void releaseConnection(Connection conn)
	{
        if (conn==null) {
            return;
        }

        try {
			conn.close();
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * @see net.jforum.DBConnection#realReleaseAllConnections()
	 */
	public void realReleaseAllConnections() throws Exception
	{
		DataSources.destroy(this.ds);
	}
}