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jforum example source code file (SimpleConnection.java)

This example jforum source code file (SimpleConnection.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

connection, connection, databaseexception, databaseexception, dbconnection, dbconnection, exception, exception, jdbc, simpleconnection, sql

The jforum SimpleConnection.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
 * 
 * This file creation date: 25/08/2004 23:32:20
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum;

import java.sql.Connection;
import java.sql.DriverManager;

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

/**
 * Non-pooled connection implementation.
 * This class will ask a new conneciton to the database on every
 * <code>getConnection() class. Uses of this class include
 * systems where a connection pool is not permited or the 
 * connections' life time is too short, not justifying to have
 * a connection pool.
 * 
 * @author Rafael Steil
 * @version $Id: SimpleConnection.java,v 1.16 2007/09/12 23:54:21 rafaelsteil Exp $
 */
public class SimpleConnection extends DBConnection 
{
	/** 
	 * @see net.jforum.Connection#init()
	 */
	public void init() throws Exception 
	{
		try {
			Class.forName(SystemGlobals.getValue(ConfigKeys.DATABASE_CONNECTION_DRIVER));
			
			// Try to validate the connection url
			Connection conn = this.getConnection();
		
			if (conn != null) {
				this.releaseConnection(conn);
			}
			
			this.isDatabaseUp = true;
		}
		catch (Exception e) {
			this.isDatabaseUp = false;
			throw e;
		}
	}

	/** 
	 * @see net.jforum.Connection#getConnection()
	 */
	public Connection getConnection()
	{
		try {
			return DriverManager.getConnection(SystemGlobals.getValue(ConfigKeys.DATABASE_CONNECTION_STRING));
		}
		catch (Exception e) {
			e.printStackTrace();
			throw new DatabaseException(e);
		}
	}

	/** 
	 * @see net.jforum.Connection#releaseConnection(java.sql.Connection)
	 */
	public void releaseConnection(Connection conn)
	{
		if (conn != null) {
			try {
				conn.close();
			}
			catch (Exception e) { }
		}
	}
	
	/** 
	 * @see net.jforum.DBConnection#realReleaseAllConnections()
	 */
	public void realReleaseAllConnections() throws Exception {}
}

Other jforum examples (source code examples)

Here is a short list of links related to this jforum SimpleConnection.java source code file:

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