LoadBalanceExceptionChecker.java

/*
  Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  This program 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.
  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA
 
 */

package com.mysql.jdbc;

import java.sql.SQLException;


public interface LoadBalanceExceptionChecker extends Extension {
	
	/**
	 * Invoked to determine whether or a given SQLException should
	 * trigger a failover in a load-balanced deployment.
	 * 
	 * The driver will not pass in a Connection instance when calling init(), but it
	 * will pass in the Properties, otherwise it acts like a normal Extension.
	 * 
	 * One instance of a handler *per* JDBC connection instance will be created. If
	 * you need singleton-like behavior, you're on your own to provide it.

	 * @param ex
	 * @return true if the exception should trigger failover.
	 */
	public boolean shouldExceptionTriggerFailover(SQLException ex);

}