ConnectionUtils.java

/*
 * Distributed as part of mchange-commons-java 0.2.11
 *
 * Copyright (C) 2015 Machinery For Change, Inc.
 *
 * Author: Steve Waldman <swaldman@mchange.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of EITHER:
 *
 *     1) The GNU Lesser General Public License (LGPL), version 2.1, as 
 *        published by the Free Software Foundation
 *
 * OR
 *
 *     2) The Eclipse Public License (EPL), version 1.0
 *
 * You may choose which license to accept if you wish to redistribute
 * or modify this work. You may offer derivatives of this work
 * under the license you have chosen, or you may provide the same
 * choice of license which you have been offered here.
 *
 * This software 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.
 *
 * You should have received copies of both LGPL v2.1 and EPL v1.0
 * along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
 * If not, the text of these licenses are currently available at
 *
 * LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 *  EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php 
 * 
 */

package com.mchange.v1.db.sql;

import java.sql.*;
import com.mchange.v2.log.*;

public final class ConnectionUtils
{
    private final static MLogger logger = MLog.getLogger( ConnectionUtils.class );

    /** 
     * @return false iff and Exception occurred while
     *         trying to close this object.
     */
    public static boolean attemptClose(Connection con)
    {
	try 
 	    {
 		if (con != null) con.close();
		//System.err.println("Connection [ " + con + " ] closed.");
 		return true;
 	    }
        catch (SQLException e)
	    {
		//e.printStackTrace();
		//System.err.println("Connection close FAILED.");

		if ( logger.isLoggable( MLevel.WARNING ) )
		    logger.log( MLevel.WARNING, "Connection close FAILED.", e );
 		return false;
	    }
    }

    public static boolean attemptRollback(Connection con)
    {
        try 
	    {
		if (con != null) con.rollback();
		return true;
	    }
        catch (SQLException e)
            {
		//e.printStackTrace();

		if ( logger.isLoggable( MLevel.WARNING ) )
		    logger.log( MLevel.WARNING, "Rollback FAILED.", e );
		return false;
	    }
    }

    private ConnectionUtils()
    {}
}